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Watlow Series 922 - Whaley Food Service

1. 2 a 4 Channel 2 7 Channel 1 s Input Option 5 Terminals 1 8 Model 922A 5__0 _ 000 Model 922A 8 _0 _ 000 Model 922A 9 _0 _ 000 1 Retransmit Common _ Chart i gt E 3 Ea 4 ap Channel 2 J a J O 7 a Channel 1 sills How to Install and Wire Chapter 4 Wire Input Figure 20 Input Option 4 Dual Process Wiring Diagram NOTE Jumper terminal 4 to 5 only when using 4 20mA input for Channel 2 NOTE Jumper Terminals 7 to 8 when using 4 20mA input for Channel 1 Figure 21 Input Option 5 8 or 9 Dual T C Wiring Diagram WARNING Use ungrounded sensor for proper operation WATLOW Series 922 User s Manual 31 Wire Output Output Option BB Dual Solid State Relay Model 922A BB _ _ 000 Figure 22 Dual S S Relay MM a L 57 Output Option Output 1 BB Wiring 2 _ Diagram Channel 1 r 22 Output 2 Output 3 Ghanneli2 gt a o o iecere Output 4 fo e a L2 Neutral L1 Hot Output Option CC Solid State Switch Figure 23 Solid State Switch Model 922A _ CC _ _ 000 Option CC Wiring Diagram Output 1 Channel 1 NOTE If SPCLFUNC Output 2 parameters OUT 1 and or OUT2 are set to CL HT then Output 3 Outputs1 and or 3 Channel 2 will be the cooling output and 4 Outputs 2 and or Suto 4 will be the heating outputs Output Option FB 4 20mA Solid State Model 922A _ FBO _ 000 Figure 24 4
2. Figure 2 How to Open the Series 922 How to Set the DIP Switches The Watlow Series 922 has a set of Dual In line Package DIP switches inside the control on circuit board A007 1727 The locations of the board and switches appear in Figure 3 The switches are clearly numbered from left to right You will use DIP Switches 1 4 and 6 5 is not used Table 1 on the next page shows the DIP switch selections Starting Out Chapter 1 WATLOW Series 922 User s Manual DIP Switches Figure 3 DIP Switch Location and Orientation Table 1 DIP Switch Selec tion WARNING Doing a cold start will cause all SETUP parameters and files to be lost DO NOT put DIP switch 1 in the ON position unless all user programmed information is to be cleared SPCLFUNC parame ters define the personality of your Series 922 Such as input type units of measure range calibration offset output action alarm type and lock out 10 WATLOW Series 922 User s Manual A007 1727 Board Control Chassis Top View Normal Operating Position Function ON OFF Cold Start Warm Start OFF Display all SPCLFUNC Choose parameters No decimal displayed Choose 1 5VDC 4 20mA input Choose Not Used OFF Normal Operation OFF Display the factory selected SPCLFUNC parameters Tenths of units displayed 0 5VDC 0 20mA input Not Used Factory Test Calibrate DIP Switch 1 det
3. Step Type POINT To FILE Values Events ON or OFF EV3 EV4 EV5 EV6 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK To FILE WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 Alarms Chapter 7 How To Use the Series 922 Alarms NOTE If your unit does not have an external output One of the most versatile features of the Watlow Series 922 is its capability for board or it s not alarms The alarms can be automatic signals for process error or temperature connected this related event type actions in your system section does not apply to your unit To use the alarms to their fullest extent you need to understand what they are and what they will do Here s an overview of the different alarm parameters again Although you may already be aware of the alarms notice how these parameters interact Alarm Relay Configuration Series 922 alarm relays are configured to de energize when the ACTUAL value is beyond the alarm limits Normally open contacts are thus closed when tem peratures are OK That way alarm conditions exist if power is lost from the control Number Of Alarms There are two alarms in the Series 922 ALARM 1 and ALARM 2 These parame ters indicate an alarm condition or a de energized alarm relay with a flashing ALRMxX XX in the
4. RETURN JUMPLOOP ae n c O Niat RETURN WAITFOR 3 N WHR WMN 60 WATLOW Series 922 User s Manual SETPOINT step is executed These events only appear when the 8 output event board is connected to the Series 922 Range OFF or ON Default Unprogrammed OFF Event OFF ON Event ON From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to FILE by pressing the MODE key One of six step types under the PROGRAM menu of the Series 922 that can be programmed as a step or file You can jump from one step to another within a file The Series 922 will jump loop to any step within your current file You cannot jump loop to another step in another file Range 1 to 99 Default 1 The number of times that the Series 922 jumps to the step that was specified by the JS step 0 Infinite number of jumps Range 0 to 100 Default 0 From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to FILE by pressing the MODE key One of six step types under the PROGRAM menu of the Series 922 that can be programmed to wait fora specific amount of time a desired set point or both When either or both are used they must be true before the program continues Value the system compares against the process variable of Channel 1 and waits for before proceeding to the next step of the program Range RiL to R1H Default Unprog
5. RM RETURN To SYSTEM J PROGRAM Menu AUTOSTART stoe LINK FILE MN Hour To SYSTEM y WATLOW Series 922 User s Manual 89 90 WATLOW Series 922 User s Manual Appendix Appendix WATLOW Series 922 User s Manual 91 Watlow Series 922 User s Manual Watlow Controls 1241 Bundy Blvd P O Box 5580 Winona MN 55987 5580 Phone 507 454 5300 Fax 507 452 4507
6. Event Option B and K Solid State Relay Figure 28a Event Option C Switched DC A A CAUTION If AC load is connected to C option output damage may occur to event board and to 922 Model A007 1732 XXBX With RC Suppression Minimum OFF state impedance 20K Model A007 1732 XXKX Without RC Suppression Minimum OFF state impedance 31M Event Alarm Outputs N o o o Im lo le O Event Output Option C Switched DC Model A007 1732 XXCX 34 WATLOW Series 922 User s Manual Load Power How to Install and Wire Chapter 4 Single Phase 120VAC Application Wiring Example WARNING Install High or low temperature limit control protection in systems where an overtemperature or undertemperature fault condition could present a fire hazard or other hazard Failure to install temperature limit control protection where a potential hazard exists could result in damage to equipment and property and injury to personnel L2 Wet Bulb RTD Cooling Output internal to oven Li L1 120 VAC Control L2 Power Earth Ground Figure 29 Series 922 System Wiring Example Dry Temp RTD Control Output Dehumidifier L4 High Limit H Mercury aoe Power Load bh Relay for 120 VAC Power Control Integral Setpot rs Fuse D O D Indicator ON w
7. Setup and Calibration NOTE Before calibration on an installed control make sure all data and Figure 40 parameters are documented Voltage Current 1 Connect the voltage current source to 6 Positive and 8 Negative on the Source to Series 922 Series 922 terminal strip for Channel 1 4 Positive and 5 Negative for Connection Diagram Channel 2 See Figure 40 Series 922 Series 922 Terminal Strip Terminal Strip Channel 1 Channel 2 r 3 Voltage Current Source D 4 S 5 a 2 Connect AC line voltage L1 to 17 L2 to 20 ground to 21 on the Series 922 terminal strip Jumper for correct line voltage See Chapter 4 How to Install and Wire 3 Set DIP Switch 6 ON Apply power to the 922 and allow it to warm up for 15 minutes The unit should be in the TEST mode 4 Connect DVM common to TP2 and DVM positive to TP1 on the A007 1728 or A007 1729 circuit board located on the top side behind the center chassis support This circuit board is dependent on your model number Your unit will have only one of these boards DVM should be set up for DC volts and in a range capable of displaying 6 3000 volts 5 Press the MODE key until DAS6 XXXX appears on the alphanumeric display Use the UP DOWN keys to adjust the alphanumeric display on the 922 to match the reading on the DVM Once the two readings match press the ENTER key 6 Press the MODE key until CH1Z XXXX appears on the alphanumeric display for C
8. Four 0 156 dia r4 mm mounting holes Power Terminal Strip Series 922 Interface Connection See Page 33 for power wiring 3 62 to 3 65 92 00 to 92 79mm Your Panel Bete ii i utou Thickness PAET 3 63 x 3 63 92 08 x 92 08mm Nominal 1 524 to 6 35mm How to Install and Wire Chapter 4 Figure 13 Series 922 Dimensions side view Figure 14 External Event Alarm Board Dimensions Figure 15 Series 922 Panel Cutout Dimensions WATLOW Series 922 User s Manual 27 Wire Power WARNING To avoid potential electric shock use National Electric Code safety prac tices when wiring connecting this unit to a power source and to electrical sensors or periph eral devices Green GND Wire Figure 16 Series 922 Power Wiring Diagram WARNING To avoid electric shock connect the chassis ground terminal to Earth Ground CAUTION Remove the short green ground jumper on the back of the 922 T 21 if your control is mounted in a metal panel connected to safety chassis ground Removing the jumper will prevent ground loops OR leave the short green ground jumper in place if the Series 922 case is not connected to safety chassis ground 28 amp Chassis 17 WATLOW Series 922 User s Manual Series 922 Power Wiring NOTE NOTE For 115VAC For 230VAC jumper 17 to 19 jumper 18 to 19 and jumper 18 to 20 L1 Chassis 1 L1 GND GND 18 Green
9. From any RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to PID by pressing the MODE key In the SETUP menu ACCESS 3 must be selected to enter the DIAGNOS parameters Here you can manually adjust percent power for Channel 1 and 2 When ACCESS 3 is selected under the SETUP mode of the Series 922 the DIAGNOS parameters appear The outputs will revert to open loop manual percent power control at the percent of power that they happen to be at before entering the DIAGNOS menu The control will revert back to a closed loop control when you leave the DIAGNOS menu Allows the operator to manually adjust the percent power output for Channel 1 If set to 100 the heat output for Channel 1 is full ON Range 100 to 100 Default power unit was at when DIAGNOS was entered Allows the operator to manually adjust the percent power output for Channel 2 This parameter will not appear if the TYP prompt has been set to T Tem perature for Channel 1 only or P Process for Channel 1 only If set to 100 the heat output for Channel 2 is full ON Range 100 to 100 Default power unit was at when DIAGNOS was entered Channel 2 ACTUAL temperature humidity Range R2L to R2H Default Unprogrammed From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to ACCESS 3 menu by pressing the MODE key In the SETUP menu ACCESS 5 must be selected to enter the SPCLFUNC parameter
10. How to Install and Wire 3 Set DIP Switch 6 to ON Apply power to the unit and allow it to warm up for 15 minutes The unit should be in the TEST mode 4 Connect DVM common to TP2 and DVM positive to TP1 on the A007 1728 circuit board located on the top side behind the center chassis support DVM should be set up for DC volts and in a range capable of displaying 6 3000 volts Appendix WATLOW Series 922 User s Manual 71 T C Calibration 72 Press the MODE key until DAS6 XXXX appears on the alphanumeric display Use the UP DOWN keys to adjust the alphanumeric display to match the reading on the DVM Once the two readings match press the ENTER key Press the MODE key until CH1Z XXXX appears on the alphanumeric display for Channel 1 CH2Z XXXX for Channel 2 Enter 0 00 millivolts from the millivolt source to the reference compensator or set the t c calibrator to 0 C 32 F Allow the Series 922 to stabilize for 10 seconds press the ENTER key Press the MODE key until parameter CH1G XXXX for Channel 1 CH2G XXXX for Channel 2 appears on the alphanumeric display Using the table below set the millivolt source to its appropriate setting from the millivolt source to the reference compensator If you are using the t c calibrator use the values in the table below Allow the Series 922 to stabilize for 10 seconds press ENTER Thermocouple Type Millivolt Source T C Calibrator Settin Settin J t c 42 283mV 1382 F 750
11. P Process for Channel 1 only Range R2L to R2H Default Unprogrammed SP2 The number of hours in combination with the MIN and SEC parameters that equal the total step time to achieve the temperature under the SETPOINT step type Range 0 to 23 hours Default Unprogrammed HOUR The number of minutes that equal total step time to achieve the MIN _ temperature of the Series 922 Under the SETPOINT step type Range 0 to 59 minutes Default Unprogrammed The number of seconds that equal total step time to achieve the SEC temperature of the Series 922 under the SETPOINT step type Range 0 to 59 seconds Default Unprogrammed This auxiliary output can be an alarm or event EV1 will only appear when AUX1 EV and the external event board is connected to the Series 922 Auxiliary outputs can be alarms or events Range OFF or ON Default Unprogrammed OFF Event OFF ON Event ON EV1 EV2 can be an alarm or event EV2 will only appear when AUX2 EV and the external event board is connected to the Series 922 or EV2 will appear if T or P in the TYP parameter under the SPCLFUNC menu have been selected and an external event board is present Range OFF or ON Default Unprogrammed OFF Event OFF ON Event ON Ev2 Represents the state the 6 event outputs are forced to when the How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 59 PROGRAM Menu E EE E
12. The user selectable scaling factors are 1 2 5 or 10mV per least significant digit If you don t have a chart recorder available you can still plot the time vs temperature system response Record the 922 s ACTUAL display readings on graph paper with an x y axis to accomplish the same thing 36 WATLOW Series 922 User s Manual How To Tune and Run the Series 922 Chapter 5 Ee E For optimum control performance tune the 922 to the thermal system The tuning settings here are meant for a broad spectrum of applications your system may have somewhat different requirements Refer to the key flow charts diagrams and definitions on Pages 42 61 for prompt location and description Repeat this tuning procedure for both Channel 1 and 2 NOTE When tuning in the Heat mode use PID prompts followed by H When tuning in the Cool mode use PID prompts followed by C 1 Apply power to the Series 922 and enter a set point in the SYSTEM menu Next go into the SETUP mode and enter ACCESS 1 the SPCLFUNC Special Function parameter Using the MODE UP DOWN and ENTER keys set the Operating Parameters initially Proportional Band PB_H C 0 Reset RS_H C 0 00 Rate RT_H C 0 00 Cycle Time CT_H C 5 Under ACCESS 0 enter CAL_ 0 Allow actual process temperature to stabilize at or near Set Point SP The ACTUAL display will indicate when the load is stabilized near setpoint Proportional Band Adjustment Graduall
13. and in a range capable of displaying 6 300 volts 5 Using the MODE key advance until the DAS6 XXXX parameter appears in the alphanumeric display Using the UP DOWN keys adjust the alpha numeric display to match the DVM display Press the ENTER key 6 Press the MODE key until the CH1Z XXXX parameter for Channel 1 appears on the alphanumeric display CH2Z XXXX for Channel 2 Set the Appendix WATLOW Series 922 User s Manual 73 men D Merl ilele tilela Table 11 RTD Parameter Seitings precision decade box to the correct RTD setting from Table 11 that corre sponds to the type of 922 unit you have Allow 10 seconds for settling press the ENTER key Press the MODE key until CH1G XXXX for Channel 1 appears on the alphanumeric display CH2G XXXX for Channel 2 Set the precision dec ade box to the correct RTD setting from Table 11 that corresponds tothe type of 922 unit you have Allow 10 seconds for settling and then press the ENTER key This unit is calibrated for JIS RTD on Channel 1 or 2 Remove power from the Series 922 Remove wires from 6 7 and 8 for Channel 1 Remove wires from 8 4 and 5 for Channel 2 Set DIP Switch 6 to the OFF position Parameters 0 1 RTD CH1Z or CH2Z 119 73 CH1G or CH2G 177 13 74 WATLOW Series 922 User s Manual Appendix Process Field Calibration Procedure Process Equipment Required e 4 1 2 digit digital voltmeter DVM e Precision voltage current source
14. the PID parameters will appear These parameters consist of Proportional Integral auto reset and Derivative rate actions Choose between CH1 or CH2 Channel 1 Channel 2 If T or P have been entered in the TYP parameter under the SPCLFUNC menu Channel 2 will not appear Range CH1 CH2 Default CH1 A proportional temperature band expressed in degrees within which a temperature controller proportioning function is active for Channel 1 heating Expressed in degrees Range 0 to 900 F 0 to 500 C 0 to 500 Units 0 0 to 90 0 F 0 0 to 50 0 C 0 0 to 50 0 Units Default 45 F 25 C 25 Units 4 5 F 2 5 C 2 5 Units A reset integral heating control action for Channel 1 that automatically eliminates offset or droop between set point and actual process tempera ture in a proportional control Expressed by repeats per minute This parame ter will not appear if PB1H is set to 0 Range 0 00 to 5 00 repeats minute Default 0 00 The rate derivative heating function for Channel 1 of the Series 922 The rate is determined by how fast the error being corrected is increasing Ex pressed in minutes This parameter will not appear if PB1H is set to 0 Range 0 00 to 5 00 minutes Default 0 00 The Channel 1 heating cycle time usually expressed in seconds for a control ler to complete one ON OFF cycle Time between successive turn ons This parameter will not appear if Your Series 922 has a 4 20mA output and OU
15. 20mA Solid State Output Option FB Wiring Diagram Output 1 Channel 1 Output 2 600 Max M aka sam Output 3 Channel 2 Output 4 32 WATLOW Series 922 User s Manual How to Install and Wire Chapter 4 Use the following figures to learn the connections and wiring of the External Event Alarm Board Refer to Page 27 for dimension and mounting information Eve nt Board Figure 26 Figure 28a amp 28b Figure 27 D D o o o k D D D D D o o o Control Power Control Power L2 L1 GND L2 L1 GND Earth Ground Earth Ground L2B L2B L1B L1B L1A LIA L2A L2A N C N C 115 VAC 230 VAC An auxiliary power supply is available on the Series 922 event board to supply DC voltage needed to operate the Vaisala Model HMM 30C RH sensor or other transmitters or transducers The supply voltage varies from 21 to 33VDC with the maximum current output of 25mA External Event Board to Series 922 Connection Ribbon Cable Connection to Series 922 Figure 25 External Event Alarm Board Information Figure 26 External Board Control Power Wiring Figure 27 Ribbon Cable Connector to Series 922 How to Install and Wire Chapter 4 WATLOW Series 922 User s Manual 33 Event Board Event Output Option B and K Solid State Relay 0 5A 24V VAC Min 253V VAC Max NOTE Check model number for appropriate diagram Figure 28
16. 922 asks what file you want to run and asks what step to begin with After entering the file and step number your program begins and the RUN LED is lit While in the RUN mode you can only view the current file and step To stop a running program press the RUN HOLD key To resume a previously halted program press the RUN HOLD key When the FILE parameter appears press the MODE key to advance to the next parameter When START appears press the MODE key again Next the RESUME parameter is now present Press ENTER AT THE SYSTEM prompt press to continue to PROGRAM mode Press to enter the PROGRAM parameter values or press to continue to SETUP SYSTEM FILE RETURN One of the three step types will be displayed depending on the type of step PROGRAMmed JUMPLOOP STOP and LINK step types are immediate and will not be visible DAY HOUR MIN 00 00 00 00 00 00 MODE Key ENTER Key UP DOWN Key Where To Go From Here Good job You ve just programmed and run the Series 922 sample program As soon as you feel comfortable with the Series 922 sample program move on to Installation and Wiring Chapter 4 Or if you have already installed and wired your system go to the Master Step Chart in Chapter 5 and begin entering and documenting your Series 922 program Sample Program Chapter 3 Chapter 4 Install Wire How to Install and Wire the Series 922 This chapte
17. 999 F 555 C U Your Settings Enter the Channel 1 Proportional Band value Heating 0 900 F 0 500 C 0 500Units 45 F 25 C 25U Enter the Channel 1 Reset value Heating Not displayed if PB1H 0 0 00 5 00 repeats minute 0 00 Enter the Channel 1 Rate value Heating Not displayed if PB1H 0 0 00 5 00 minutes 0 00 Enter the Channel 1 Cycle Time value Heating Not displayed if PB1H 0 Dependent on output amp OUT1 1 60 seconds 5 Enter the Channel 1 Rate Band value Heating Not displayed if PB1H 0 0 denotes rate is always functional 0 7 times PB1H 0 Enter the Current Dead Band value for Channel 1 36 to 36 F 20 to 20 C 20 to 20 Units 0 Enter the Channel 1 Proportional Band value Cooling 0 900 F 0 500 C 0 500Units 45 F 25 C 25U RB1C Enter the Channel 1 Reset value Cooling B1C 0 0 00 5 00 repeats minute 0 00 Enter the Channel 1 Rate value Cooling Not displayed if PB1C 0 0 00 5 00 minutes 0 00 Enter ine leaa 1 Cycle Time value raong 1 60 seconds 5 Enter re Charnel 1 Rate Band value Coolie Not displayed if PB1C 0 0 denotes rate is always functional 0 7 times PB1C 0 RETURN 46 Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the PID prompt WATLOW Series 922 User s Manual How To Program the Series 922
18. C K t c 50 633 mV 2282 F 1250 C T tlc 17 816mV 662 F 350 C Remove power from the Series 922 Remove thermocouple wires from 6 and 8 for Channel 1 3 and 5 for Channel 2 Turn off the compensator Set DIP Switch 6 to the OFF position WATLOW Series 922 User s Manual Appendix RTD Calibration RTD Field Calibration Procedure Equipment Required e 100 precision decade resistance box with 0 01 ohms resolution e 4 1 2 digit digital voltmeter DVM Setup and Calibration NOTE Before calibration on an installed control make sure all data and parameters are documented 1 Connect the precision decade box to 6 7 and 8 of the Series 922 Figure 39 terminal strip for Channel 1 as shown on Figure 39 For Channel 2 connect Decade Resistance the precision decade box to 3 4 and 5 of the terminal strip Box to Series 922 Connection Diagram 2 Connect AC line voltage L1 to 17 L2 to 20 ground to 21 Jumper for Series 922 Series 922 Terminal Strip Terminal Strip Channel 1 Channel 2 IOs li eal loos General Radio Model 1433 T correct line voltage see Chapter 4 How to Install and Wire 3 Set DIP Switch 6 ON Apply power to the Series 922 and allow it to warm up for 15 minutes The unit should be in the TEST mode 4 Connect DVM common to TP2 and DVM positive to TP1 on the A007 1729 circuit board Located on the top side behind the center chassis support DVM should be set up for DC volts
19. Channel 2 according to the HOUR MIN SEC parameters Dependent on TYP parameter under SPCLFUNC R2L and R2H HOUR Enter the hours programmed for this step 0 23 hours MIN Enter the minutes programmed for this step 0 59 minute SEC Enter the seconds programmed for this step 0 59 seconds EV1 Enter the Event Output 1 status Dependent on output amp AUX1 OFF or ON EV2 Enter the Event Output 2 status Dependent on output amp AUX2 OFF or ON EV3 Enter the Event Output 3 status Dependent on output board OFF or ON EV4 Enter the Event Output 4 status Dependent on output board OFF or ON EV5 Enter the Event Output 5 status Dependent on output board OFF or ON EV6 Enter the Event Output 6 status Dependent on output board OFF or ON EV7 Enter the Event Output 7 status Dependent on output board OFF or ON EV8 Enter the Event Output 8 status Dependent on output board OFF or ON RETURN Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the FILE prompt JUMPLOOP Siep Type JS Enter the step number the 922 will jump to JC Enter the number of times the 922 will jump to the step indicated by JS RETURN Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the FILE prompt WAITFOR Step Type WHR Enter the hours
20. Chapter 6 Table 9 continued CH2 PB2H Description ACCESS 1 PID Continued To enter PID parameters use ACCESS 1 amp press ENTER Enter the Channel 2 Proportional Band value Heating Dependent on TYP parameter SETUP Menu 0 900 F 0 500 C 0 500Units Default 45 F 25 C 25U RS2H Enter the Channel 2 Reset value Heating Not displayed if PB2H 0 Dependent on TYP parameter 0 00 5 00 repeats minute 0 00 RT2H Enter the Channel 2 Rate value Heating Not displayed if PB2H 0 Dependent on TYP parameter 0 00 5 00 minutes 0 00 CT2H Enter the Channel 2 Cycle Time value Heating Not displayed if PB2H 0 Dependent on output TYP amp OUT2 1 60 seconds 5 RB2H Enter the Channel 2 Rate Band value Heating Not displayed if PB2H 0 Dependent on TYP parameter 0 denotes rate is always functional 0 7 times PB2H DB2 Enter the Current Dead Band value for Channel 2 Dependent on TYP parameter 36 to 36 F 20 to 20 C 20 to 20 Units 0 PB2C Enter the Channel 2 Proportional Band value Cooling Dependent on TYP parameter 0 900 F 0 500 C 0 500U 45 F 25 C 25U RS2C Enter the Channel 2 Reset value Cooling Not displayed if PB2C 0 Dependent on TYP parameter 0 00 5 00 repeats minute 0 00 RT2C Enter the Channel 2 Rate value Cooling Not displayed if PB2C 0 Dependent on TYP parameter 0 00 5 00 minu
21. GND La Wire Earth Earth Ground Ground 2 22 23 Remote Hold 23 Remote Hold 24 External Event 24 External Event Input Input Connect AC power lines and jumper wires to the power supply terminal strip of the Series 922 Study the strip connections carefully before beginning Be sure to use these jumpers on the power supply terminal strip For 230VAC jumper 18 to 19 For 115VAC jumper 17 to 19 and jumper 18 to 20 All wiring and fusing must conform to the National Electric Code and to any locally applicable codes also Before applying power open the Series 922 and set DIP Switch 1 in the ON position for a Cold Start Replace the control chassis in the enclosure Apply power to the unit This clears all previously entered information from the 922 it is a clean or cold start Now remove power again open the unit and set Switch 1 to OFF This makes the next start a warm one retaining all subsequently entered informa tion in the processor s memory Close the 922 When applying power without sensor inputs on the Signal Conditioner terminal strip or if the control is not configured for the correct sensor input the Series 922 alternately flashes from SYSTEM to ER1 00XX This is an error code indicating an open sensor These are normal displays for a unit without sen sors or improper configuration For more information on remote hold and external event input refer to page 38 How to Install and Wire Chapter 4 Ho
22. P Channel 1 only have been selected in the TYP parameter under the SPCLFUNC menu Range 0 to 900 F 0 to 500 C 0 to 500 Units 0 0 to90 0 F 0 0 to 50 0 C 0 0 to 50 0 Units 0 to 500 RH Default 45 F 25 C 25 Units 4 5 F 2 5 C 2 5 Units 25 RH PB2H How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 51 ep m C 5 Z e Cc A reset integral heating control action for Channel 2 that automati cally eliminates offset or droop between point and actual process temperature in a proportional control Expressed by repeats per minute This parameter will not appear if PB2H is set to 0 or if T or P have been selected in TYP under the SPCLFUNC parameter Range 0 00 to 5 00 repeats minute Default 0 00 RS2H RT2H The rate derivative heating function for Channel 2 of the Series 922 The rate is determined by how fast the error being corrected is increasing Expressed in minutes This parameter will not appear if PB2H is set to 0 Range 0 00 to 5 00 minutes Default 0 00 The Channel 2 heating cycle time usually expressed in seconds for a controller to complete one ON OFF cycle Time between successive turn ons This parameter will not appear if Your Series 922 has a 4 20mA output and OUT2 under the SPCLFUNC menu is set to HTCL PB2H is set to 0 or you have selected T or P Channel 1 only in the TYP parameter under the SPCLFUNC menu Range 1 to 60 s
23. Select 1 or 2 PBIH_ ERE RTIH CTIH RIH RBiH R2 L DBI R2H PBiC RETURN RSiC AUX2 To SYSTEM RTiC ALTYP 1 GHE RBIC LAT Press to return to SYSTEM or press to return to the first parameter COM COM ID How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 45 SETUP Menu Prompt Make Description ACCESS 0 CALIB To enter CALIB parameters use ACCESS 0 and ENTER photocopies keep original clean Range Table 9 SETUP Prompts and Description Default TL XX XX Read only Displays the Real Time HH MM HOUR Enter the hours to display the system time of day clock 0 23 hours MIN Enter the minutes to display the system time of day clock 0 59 minutes CAL1 Enter the Calibration Offset value for Channel 1 90 to 90 F 50 to 50 C 9 0 to 9 0 F 5 0 to 5 0 C U CAL2 Enter the Calibration Offset value for Channel 2 Dependent on TYP parameter 90 to 90 F 50 to 50 C 9 0 to 9 0 F 5 0 to 5 0 C U A1H Enter the Alarm 1 High value Displayed if AUX1 AL Dependent on AUX1 and ALTYP1 parameters See below AiL Enter the Alarm 1 Low value Displayed if AUX1 AL Dependent on AUX1 and ALTYP1 parameters See below A2H Enter the Alarm 2 High value Displayed if AUX2 AL Dependent on AUX2 ALTYP2 and TYP param
24. There can be up to ten profiles consisting of a total of 99 steps You can only choose one step type per step Graphics Key MODE Key NOTE Shaded ENTER Key parameters may not ay UP DOWN Key appear on your control These parameters are dependent on how your control is config ured See Pages 58 61 for more informa NOTE The Series 922 leaves the factory programmed for a warm start tion STOP steps will appear as a default until you program your 922 Figure 33 PROGRAM Key Flow fefe Y AE At the SYSTEM prompt press to continue to PROGRAM mode Press to enter the PROGRAM menu STOP LINK FILE MIN RETURN RETURN MN O RETURN Press to return to SYSTEM or press to return to the file prompt To SYSTEM How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 57 PROGRAM Menu Make photocopies keep original clean PROGRAM Description Default Table 10 PROGRAM Prompts and Description Your Settings Current system file to edit 1 Select step number to view or edit Press MODE for step type prompt To change step type use the increment decrement key and press ENTER SETPOIN T Step Type SP1 Enter the temperature to achieve for the step s ending set point for Channel 1 according to the HOUR MIN SEC parameters RiL and R1H SP2 Enter the temperature to achieve for the step s ending set point for
25. alphanumeric display By retaining the indication of a previ ous alarm condition an operator absent from the control panel can be aware that an alarm occurred We ll look more closely at that in a few minutes Alarm 1 will only respond to Channel 1 and Alarm 2 only responds to Channel 2 How To Use The Alarms Chapter 7 WATLOW Series 922 User s Manual 63 Alarms Figure 34 Alarm Type for Alarm 1 is Process Alarm ALTYP1 P Figure 35 Alarm Type for Alarm 1 is a Devia tion Alarm ALTYP 1 D Alarm Types There are two Alarm Types for each alarm ALTYP1 and ALTYP2 are the prompts for Alarm 1 and Alarm 2 respectively The choices are Process alarm P or Deviation alarm D For review a process type alarm is one that is set at a fixed degree dis tance either positive or negative from the mean 0 C or 0 F A deviation type alarm is always a fixed degree distance positive or negative from Set Point SP If we change SP a process type alarm remains where it was originally set while a deviation type alarm will shift with SP the same number of degrees as its value The examples illustrate a plot of each alarm type Here we ve added a process alarm function to the basic graph Temp r Process Alarm SP1 AM PEET T Mest ven Mg AFET TE CET Fixed Distance from 0 Actual 0 C This graph shows a deviation alarm setting and how it shifts with a change in SP Deviation Ala
26. appear if The 2 or 8 event output board is not connected AUX1 EV or DIP Switch 2 is ON Range Alpha Display Alarm Type ALTYP1 P Process Alarm ALTYP1 D Deviation Alarm Default P Determines whether the alarm type for Auxiliary Output 2 will be a process alarm or deviation alarm This parameter will not appear if The external 2 event or 8 event output board is not connected if the TYP parameter has been set to T or P Channel 1 only or if DIP Switch 2 is ON Range Alpha Display Alarm Type ALTYP2 P Process Alarm ALTYP2 D Deviation Alarm Default P Selects alarms as latching or non latching Latching means the alarms remain active until you manually clear it This will not appear if DIP Switch 2 is ON Range LAT or NLAT Default NLAT Allows the operator to change the input gain of one or both of the RTD input channels for different curves This parameter will not appear if The input board type is Dual T C T C Process or Dual Process or DIP Switch 2 is ON Range JIS or DIN Default JIS The Altitude parameter represents the setting for altitude in feet above sea level for barometric correction when in the humidity mode This parameter only appears if the TYP parameter is set to T H This parameter will not appear if DIP Switch 2 is ON Range 0 2500 5000 Default 0 The Guaranteed Soak parameter guarantees the actual temperature for Channel 1 is being controlled within a window around set point while a profil
27. charts here but make copies to document your control Prompt definitions are also listed in the glossary Programming in General Programming the Series 922 is easy as 1 2 3 1 Use the MODE key to select the alphanumeric display prompt you want 2 Use the UP DOWN keys to select data or prompts in the alphanumeric display 3 Press ENTER SYSTEM Menu The SYSTEM mode has the capability to generate a non ramping set point and manipulate events You can also clear alarms and error codes from this menu Step through the SYSTEM menu using the key flow diagram and table below Graphics Key MODE Key ENTER Key UP DOWN Key NOTE Shaded parameters may not appear on your control These parameters are dependent on how your control is configured See Pages 43 44 for more information Press to enter SYSTEM menu After selecting a value with the oO keys press f Continue to the next parameter by pressing i Figure 31 SYSTEM Key Flow RETURN At any RETURN you can press to return to To SYSTEM SYSTEM or press to return to the first parameter 42 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 Table 8 SYSTEM Prompts and Description SYSTEM Prompt Make photocopies keep original clean Description Monitor Enter CH 1 Fixed Set Point value TEMP RiL and R1H PROC AiL and A1H SYSTEM Menu Default Your Settings 73 F 23 C 73 4 F 23
28. here Temp Time Alarm Function Latching or Non Latching Alarm function is either latching or non latching Latching is a means of saving indication of an alarm event for the operator to clear manually A latching alarm requires the operator to manually clear it with the ENTER key when ACTUAL returns to within the limits A non latching alarm clears itself automatically when ACTUAL returns to within the limits It s your choice Here again is the LAT information from the Operating Parameters LAT Defines Alarm Function NLAT Non latching Alarm relays are automatically energized when ACTUAL temperature returns to within the operating band as defined by ALTYP X AXL and AXH LAT Latching Requires the ENTER key to manually energize alarm relays after ACTUAL temperature returns to within the operating band as defined by ALTYP X AXL and AXH To clear an alarm in the RUN mode simply press ENTER To clear an alarm in the HOLD mode return to the SYSTEM prompt Press the MODE key until CLR ALRM is displayed and press ENTER 66 WATLOW Series 922 User s Manual How To Use The Alarms Chapter 7 Alarms Clearing An Alarm Message You can clear a latched alarm when the ACTUAL display value returns to within the operating band You do not need to clear indeed you cannot clear a non latching alarm A non latching alarm clears itself as soon as the AC TUAL display value returns to within the operating band There
29. or P Channel 1 only or DIP Switch 2 is ON Changing this parameter defaults parameters SP2 A2L A2H and clears all files Represents the high limit to set points associated with Channel 2 The default values are also the high limits of the specific input type This parameter will not appear if the TYP parameter has been set to T or P Channel 1 only or DIP Switch 2 is ON Changing this param eter defaults parameters SP2 A2L A2H and clears all files How To Program the Series 922 Chapter 6 This parameter determines whether Auxiliary Output 1 will be an alarm or event output for the Series 922 This parameter will not appear if the 2 event or 8 event output board is not connected or DIP Switch 2 is ON Range Alpha Display Auxiliary Output 1 s Function AUX1 AL Alarm Output defined for Event 1 AUX1 EV Event Output defined for Event 1 Default AL This parameter determines whether Auxiliary Output 2 will be an alarm or event output for the Series 922 This parameter will not appear if the external 2 event or 8 event output board is not connected the TYP parameter has been set to T or P Channel 1 only or DIP Switch 2 is ON Range Alpha Display Auxilary Output 2 s Function AUX2 AL Alarm Output defined for Event 2 AUX2 EV Event Output defined for Event 2 Default AL Determines whether the alarm type for Auxiliary Output 1 will be a process alarm or a deviation alarm for the Series 922 This parameter will not
30. the 922 will wait relative to the beginning of the step 0 23 hours WMN Enter the minutes the 922 will wait relative to the beginning of the step 0 59 minutes WE Enter the state of the event input to wait for before continuing the program OPEN or CLSE w1 Enter a value to compare with the process variable of Channel 1 RiL R1H W2 RETURN Enter a value to compare with the process variable of under SPCLFUNC R2L R2H Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the FILE prompt AUTOSTART Step Type DAY Enter the number of days for the 922 to wait until AUTOSTART takes place 0 6 days HOUR Enter the number of hours for the 922 to wait for the time of day clock before AUTOSTART takes place 0 23 hours MIN Enter the number of minutes for the 922 to wait for the time of day clock before AUTOSTART takes place 0 59 minutes RETURN Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the FILE prompt STOP Siep Type STOP Press ENTER to display the last step of the program RETURN Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the FILE prompt LINK Step Type FILE The current system file will always link to Step 1 in the file specified 58 RETURN Press the ENTER key to return to the SY
31. through EV8 are not displayed unless you have the 8 event output board connected See the Model Number Information on Page 70 for ordering information If the events are programmed for one step and left unprogrammed for the next step the events maintain the last programmed status These event outputs are solid state relays rated at 0 5 amps up to 240VAC Guaranteed Soak The Series 922 Guaranteed Soak GS feature insures that the process tempera ture tracks a programmed ramp The Guaranteed Soak acts as a deviation alarm The program clock halts if the ACTUAL temperature exceeds the Guaranteed Soak value At this time the HOLD LED flashes The clock starts once the process variable is within the GS deviation value Programmed in degrees or process units GS is in the SETUP menu under ACCESS 5 Entering a value of 0 disables the Guaranteed Soak function The Guaranteed Soak function only applies to Fi 30 Channel 1 Figure 30 is an example of the Guaranteed Soak function ae Guaranteed Soak GS Example Programmed Ramp NOTE If the program is put in the HOLD mode while holding for a guaranteed soak and restarted at another step the GS has to be met for the previous step before the program can continue Temperature Guaranteed Soak Window Around Set Point Time How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 39 Jumploops The Four JUMPLOOP Types The Series 922 gives you the
32. time 00 00 is achieved one day has gone by If left blank unprogrammed the day count is ignored for use as a daily event rather than weekly Range 0 to 6 days Default Unprogrammed DAY Stands for the hour that the 922 waits for the time of day clock before AUTOSTART takes place Under the AUTOSTART step type Range 0 to 23 hours Default Unprogrammed HOUR MIN C This parameter represents the minutes that the 922 waits for on the time of day clock before AUTOSTART takes place Under the AUTOSTART step type Range 0 to 59 minutes Default Unprogrammed RETURN From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to FILE by pressing MODE STOP One of six step types under the PROGRAM menu of the Series 922 that indicates the end of any file RETURN From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to FILE by pressing MODE One of six step types under the PROGRAM menu of the Series 922 LINK that allows you to link one file to another FILE Enter the number of the file that you want to link to from here 3 Range 1 to 10 Default 1 RETURN From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to FILE by pressing MODE How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 61 VERIGE Kc RelA Chart 1 Master Step chart 62 Step Type SETPOINT Values Make photocop
33. which one to use For very dirty or critical application use microcomputer regulated power supply or Uninterruptable Power Supply U P S D M Line Filter Line Load ptt eee en nono oo 3 C M Line Filter Line Control Shield C M Line D M Line Filter Filter Line Load Line Load WATLOW Series 922 User s Manual 25 How to Install and Wire Chapter 4 Wiring Guide Figure 9 Differential Mode Filter Diagram NOTE Keep filters 12 inches or less from the control Minimize the line distance where noise can be reintroduced to control Figure 10 Common Mode Filter Diagram NOTE To prevent ground loops do not fasten common mode line filters or filters with metal cases to metal that is at ground poten tial Doing so will reduce filter effec tiveness Figure 11 Combination Differential Common Mode Filter Diagram Installation Installation Information CAUTION The front panel screw turns 90 only Do not apply excessive force or turn the screw more than 90 Figure 12 Series 922 Faceplate Dimensions The Series 922 mounts in a panel cutout with two brackets These brackets hold the case against the front panel The Series 922 behind panel dimensions are 3 56 in 9 05mm high by 3 56 in 9 05mm wide by 6 0 in 15 24mm deep Figure 12 shows the dimensions of the front panel bezel The 922 weighs 2 75 lbs 1 25Kg For unit dimensional and m
34. 0 C Monitor Enter CH 2 Fixed Set Point value Dependent on TYP under SPCLFUNC TEMP R2L and R2H PROC A2L and A2H 73 F 23 C 73 4 F 23 0 C Displays CH 2 actual process variable Dependent on TYP under SPCLFUNC Monitor Enter the Event Output 1 status Dependent on AUX1 EV amp output board OFF or ON OFF Monitor Enter the Event Output 2 status Dependent on AUX2 EV amp output board OFF or ON OFF Monitor Enter the Event Output 3 status Dependent on 8 event output board OFF or ON OFF Monitor Enter the Event Output 4 status Dependent on 8 event output board OFF or ON OFF Monitor Enter the Event Output 5 status Dependent on 8 event output board OFF or ON OFF Monitor Enter the Event Output 6 status Dependent on 8 event output board OFF or ON OFF Monitor Enter the Event Output 7 status Dependent on 8 event output board OFF or ON OFF Monitor Enter the Event Output 8 status Dependent on 8 event output board OFF or ON Displays status of the external event input OPEN or CLOSE CLR ALARM Displays Clears the most recent fatal error 0 18 0 40 Displays the current alarm 1 High 1 Low 2 High 2 Low RETURN SYSTEM SP1 S C2 RH P 2 Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the SP1 prompt Sh
35. 2 JC 01 Step 4 JUMPLOOP JS 01 JC 01 Step 5 SETPOINT Step 6 JUMPLOOP JS 01 JC 01 Step 7 STOP The steps in sequence will be 1 2 3 2 3 4 1 2 3 2 3 4 5 6 1 2 3 2 3 4 1 2 3 2 3 4 5 6 7 intertwined Loop An Intertwined loop can break across other loops Step 1 SETPOINT Step 2 SETPOINT Step 3 JUMPLOOP JS 01 JC 01 Step 4 JUMPLOOP JS 02 JC 01 Step 5 STOP The steps in sequence will be 1 2 3 1 2 3 4 2 3 1 2 3 4 5 Rules to Follow The one basic rule that you must follow is that you can only have a maximum of three consecutive jump loops ee 1 SETPOINT Csi 2 JUMPLOOP JS 01 JC 01 Step 3 JUMPLOOP JS 01 JC 01 Step 4 JUMPLOOP JS 01 JC 01 Step 5 JUMPLOOP JS 01 JC 01 Step 6 STOP Your program will run until it reaches Step 5 and flashes an ER2 0039 This is the infinite looping error and means you have too many consecutive loops Another rule to follow is you cannot JUMPLOOP to a step you are on You ll receive an ER2 0039 Clear the error in the ER2 parameter under the SYS TEM menu and retransmit your data Use simple loops in your program How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 41 SYSTEM Menu The next pages will show you each of the Series 922 menus and their prompts and values Each section SYSTEM SETUP and PROGRAM has a menu graphic with a table of values followed by prompt definitions Don t write in the tables and
36. 3 fata eh Step 2 A soak step step 75 Ramps from holds set Temp F Step 1 75 to 100 F point at 75 F Initializ 50 Sue BOE 2 0 5 10 15 0 5 5 40 4 5 Time seconds WATLOW Series 922 User s Manual Sample Program Chapter 3 Running Your Program Sample Program 1 Return to SYSTEM using the ENTER key at the RETURN prompt Press the RUN HOLD key 2 The 922 asks what FILE to run Enter 1 if itis not already entered 3 The 922 asks what step you would like to start on Again press 1 if it is not already there and press ENTER The 922 quickly shows the step type and jumps to Step 1 the RUN LED is lit After each step is completed the next step the 922 performs appears You may step through the parameters to see what the step type is and what the parameters are set at by pressing the MODE key The Time Remaining is also displayed at the end of the menu Once the Time Remaining reaches 00 00 00 it shows what step the profile has progressed to Editing Your Program Now let s try editing the program by expanding it with another ramp and soak step and adding a jump loop We ll jump to Step 1 and repeat Steps 1 through 6 two more times This is accomplished by programming a Jump Step JS 1 and Jump Count JC 2 This means that once the 922 goes through the program and reaches Step 6 it jumps back to Step 1 and repeats the program two more times By this time you should understand the basic concept of the Series 922 an
37. Action which provides output switching only at the zero voltage crossing points of the AC line Appendix A Accessories 70 Actual and Alphanumeric Display Area 13 Fig 6 Alarms Clearing 67 Function 66 Limits 65 Types 64 AUTOSTART Step Type 18 B Backward Jump 40 Cc Calibration 71 Chart Recorder 36 56 Clean Input Power The Do s and Don ts 23 Combination Differential Filter 25 Fig 11 Common Mode Filter Wiring 25 Fig 10 D Decade Resistance Box to Series 922 Connection Diagram 73 Fig 41 Default Parameters 43 46 48 58 Differential Mode Filter Wiring 25 Fig 9 Dimensions External Event Alarm Board 27 Fig 14 Faceplate 26 Fig 12 Panel Cutout 27 Fig 15 Sideview 27 Fig 13 DIP Switch Location 10 Fig 3 Selection 10 Table 1 DIP Switches 10 38 How to Set 9 E Editing Your Program 17 Enter Operating Data And Operating Parameters Chapter 6 42 Error Codes 87 Event Inputs 28 33 38 44 Outputs 34 F Forward Jump 40 G Glossary 76 Ground Loops 24 Guaranteed Soak GS 39 H How To Install And Wire The Series 922 Chapter 4 21 Install the Series 922 26 Open the 922 9 Fig 2 Program the 922 Chapter 6 38 Appendix Index Set DIP Switches 9 Tune Chapter 5 36 Run 20 Use Alarms Chapter 7 63 Use the Keys and Displays Chapter 2 12 Wire The Series 922 29 l Index 83 Input Options 29 Fig 17 21 Input Power Definitions 23 Intertw
38. CC Wiring Diagram Figure 23 32 4 20mA Solid State Output Option FB Wiring Diagram Figure 24 33 External Event Alarm Board Information Figure 25 33 External Board Control Power Figure 26 33 Ribbon Cable Connector to Series 922 Figure 27 34 Event Output Option B and K SSR Wiring Diagram Figure 28a 34 Event Output Option C Switched DC Wiring Diagram Figure 28b 35 Series 922 System Wiring Example Figure 29 39 Guaranteed Soak GS Example Figure 30 42 SYSTEM Key Flow Figure 31 45 SETUP Key Flow Figure 32 57 PROGRAM Key Flow Figure 33 64 Alarm Type for Alarm 1 is Process Alarm ALTYP1 P Figure 34 64 Alarm Type for Alarm 1 is a Deviation Alarm ALTYP1 D Figure 35 65 Alarm Limits for alarms 1 and 2 with Process Type Alarm ALTYP1 P ALTYP2 P Figure 36 66 Alarm Limits for Alarms 1 and 2 with Deviation Type Alarm ALTYP D ALTYP D Figure 37 71 Reference Compensator to Series 922 Connector Diagram Figure 38 73 Decade Resistance Box to Series 922 Connection Diagram Figure 39 75 Voltage Current Source to Series 922 Connection Diagram Figure 40 WATLOW Series 922 User s Manual 5 Tables Page Item 10 DIP Switch Selection 16 Series 922 Ramp and Soak Program 17 Editing Your Program Steps 4 7 18 Adding the AUTOSTART Step 18 LINKing to Another File 19 The WAITFOR Step 24 Noise Suppression Device Ratings 43 SYSTEM Prompts and Description 46 SETUP Prompts and Description 58 PROGRAM Prompts and Description 74 RTD Para
39. Default The first column entry of the above board types Select an output type for Channel 1 Action in response to the differ ence between set point and process variable This parameter will not appear if DIP Switch 2 is ON Range Alpha Display Output 1 Output 2 OUT1HTCL Heat PID Cool PID OUT1CLHT Cool PID Heat PID Default HTCL Select an output type for Channel 2 Action in response to the differ ence between set point and process variable This parameter will not appear if the TYP parameter has been set to T Temperature for Channel 1 only or P Process for Channel 1 only under the TYP parameter or DIP Switch 2 is ON Range Alpha Display Output 3 Output 4 OUT2HTCL Heat PID Cool PID OUT2CLHT Cool PID Heat PID Default HTCL Represents a low limit to set point for Channel 1 The default values are also the low limits of your input type This prompt will not appear if DIP Switch 2 is ON Changing this parameter defaults parameters SP1 A1L A1H and clears all files Represents a high limit to set point for Channel 1 The default values are also the high limits of your input type This prompt will not appear if DIP Switch 2 is ON Changing this parameter defaults parameters SP1 A1L A1H and clears all files Represents the low limit to set points associated with Channel 2 Default values are also the low limits of the specific input type This parameter will not appear if the TYP parameter has been set to T
40. EM Programming File 1 Our first step in programming is to make a short ramp and soak program Step 1 initializes the set point to a known starting point for the ramp Step 2 is a short ramp Step 3 is a soak step which holds the programmed set point constant for the programmed time Step 4 is a STOP step which signals the end of a file 1 From the SYSTEM menu press MODE until you see the PROGRAM menu Press ENTER The Series 922 asks you for a FILE Your 922 should already say 1 but if you have entered any values it may be different Make sure it says 1 Press ENTER The display now shows STEP with a 1 flashing Use the UP DOWN keys to select 1 then press ENTER if it is not already there Press the MODE key Use the UP DOWN keys to select the step type and values Press ENTER Use Table 2 to enter the corresponding parameters and values The parameters appear from left to right on the table At the end of each menu rather than press ENTER at the RETURN parameter to get to SYSTEM press MODE for the STEP prompt The step number automati cally increments and flashes Press ENTER FILE STEP STEP SP1 HOUR MIN SEC EV1 EV2 Table 2 TYPE Series 922 1 1 SETPOINT 75 0 0 1 OFF ORF Pamp ana ore 1 2 SETPOINT 100 0 0 25 ON OFF rogram 1 3 SETPOINT 100 0 0 25 ON OFF 1 4 STOP NOTE Step 4 must i be entered as a step even though it Sei defaults to a STOP 100 Step
41. FILE parameter in the PROGRAM menu The MIN parameter has three meanings depending upon which parameter you are in PROGRAM menu The number of minutes that equal total step time to achieve the temperature of the Series 922 Under the AUTOSTART step type in the PROGRAM menu it represents the minutes that the 922 will wait for on the time of day clock before AUTOSTART takes place SETUP menu The SYSTEM 24 hour time of day clock setting Adjustment to actual input temperature and to the temperature values the Series 922 uses for display and control Control of temperature about a set point by turning the output full ON below set point and full OFF above set point in heat mode Control system with no sensory feedback The 922 uses a closed loop Area around set point in the Series 922 where ACTUAL tempera ture is deemed safe or OK The band is defined under ACCESS 5 SPCLFUNC under the SETUP menu by Alarm Types ALTYP1 and ALTYP2 and under ACCESS 0 CALIB by Alarm High and Low Limits A1H A1L and A2H A2L WATLOW Series 922 User s Manual 79 Glossary O R i 80 Output Overshoot PB1C PB2C PB1H PB2H P control Parameter PD control PI control PID PID control Process Variable Programmed display data Proportional band Proportioning control R1H R2H R1L R2L Rate Rate Band RB1C RB2C WATLOW Series 922 User s Manual Select an output type Action i
42. File 5 Profile 5 175 Step 2 Ramps to 175 E Step 3 Step 4 Soak step 150 125 Step 1 100 Autostart step Step 6 Temp F Step 5 Ramps to 75 F Soak step Step 7 Stop step 50 p step 25 0 00 0 30 1 00 1 30 2 00 2 30 3 00 Minutes Seconds WATLOW Series 922 User s Manual Sample Program Chapter 3 Sample Program The last step type we will work with is the WAITFOR step This is a test step It compares a specified temperature with the process temperature or a speci fied event state with the event input before continuing the program It can also wait for a programmed time to elapse before continuing on with the program After the test is successful the program continues with the next sequential step Events cannot be programmed in this step they maintain their previous state The WAITFOR Step Return to PROGRAM and enter FILE 5 Add a WAITFOR step to the end of that file FILE STEP STEP W1 WHR WMN WE Table 6 TYPE The WAITFOR Step 5 6 WAITFOR 5 7 STOP WHR WMN WE and W1 are unprogrammed To program a WAITFOR time enter your values for WHR and WMN The programmed WAITFOR time waits until the specified amount of time has elapsed WAITFOR time WHR WMN WE and Channel 1 process variable W1 can be programmed simultaneously Each of these Wait For conditions must be met before the program will con tinue Once a WAITFOR condition is satisfied it l
43. Program in Action This chapter will guide you through an easy sample program for the Series 922 You can quickly grasp the necessary terms and concepts by entering values and then observing this exercise If you feel that your knowledge of ramping controllers does not require a sample program to learn the Series 922 skip this chapter A Brief Overview This sample program teaches you the fundamentals of creating a ramping profile along with ways to expand that profile to its greatest versatility The program example starts with a simple ramp and soak profile A ramp progresses from one set point to another set point over a period of time Soaking controls the length of time the temperature holds at this level We then expand it to multiple ramp and soaks add JUMPLOOP functions perform an AUTOSTART LINK to another profile and finally perform a WAITFOR step This sample program only goes through the steps of programming Channel 1 of the Series 922 The process for Channel 2 is the same Events 3 through 8 are not shown At this point make copies of your Master Step Chart on Page 62 It is a good practice to keep track of your program as you go It s also a good idea to sit down and define exactly what you want your program to do Clear Memory Set DIP Switches If you haven t already cleared your Series 922 s memory do a Cold Start Turn the power OFF open the 922 and ensure that DIP Switch 1 is ON Apply power momentarily
44. STEM prompt Press the MODE key to return to the FILE prompt WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 PROGRAM Menu Shaded parameters may not appear on your control They are dependent on your control configuration One of three main level operating menus From the SETUP menu Program you can enter or view step type program loops wait for conditions set points auxiliary event outputs ON OFF and step duration FILE Represents the current SYSTEM file of the Series 922 to be edited or reviewed Range 1 to 10 files Default 1 Represents the current step of a file of the Series 922 to be edited or STEP_ reviewed Range 1 to 99 steps Default 1 One of six step types under the PROGRAM menu of the Series 922 SETPOINT Can be programmed as a file or a step to achieve or maintain a set point Represents the temperature that the system will try to achieve on Channel 1 in the amount of time given This will be done linearly producing a ramp from a beginning set point to an end set point Range R1L to R1H Default Unprogrammed SP Represents the temperature that the system will try to achieve on Channel 2 in the amount of time given This will be done linearly producing a ramp from a beginning set point to an end set point This parameter will not appear if the TYP prompt under the SPCLFUNC menu has been selected as T Temperature for Channel 1 only or
45. Series 922 User s Manual PROGRAM Microprocessor Based Ramping Control O LOW Watlow Controls Watlow Controls 1241 Bundy Blvd P O Box 5580 Winona MN 55987 5580 Phone 507 454 5300 Fax 507 452 4507 W922 XUMN Rev C00 10 00 April 1996 Made in the U S A Supersedes 3 Printed on Recycled Paper W922 MA50 9246 Use The Manual First Starting Out Front Panel Running a Program Install Wire Tune Programming Alarms Appendix This manual will make your job easier Reading it and applying the information is a good way to become familiar with the Series 922 Here s an overview Introduction Chapter 1 Keys and Displays Chapter 2 Sample Program Chapter 3 Installation and Wiring Chapter 4 How to Tune Chapter 5 How to Program Chapter 6 How to Use Alarms Chapter 7 Specifications Glossary Calibration Warranty Series 922 error codes and prompts see Pages 87 89 Notes Cautions and Warnings We use note caution and warning symbols throughout this book to draw your attention to important operational and safety information A bold text NOTE marks a short message in the margin to alert you to an important detail A bold text CAUTION safety alert appears with information that is important for protecting your equipment and performance Be especially careful to read and follow all cautions that apply to your application A bold text WARNING safety alert appears with informati
46. T1 under the SPCLFUNC menu is set to HTCL or PB1H is set to 0 Range 1 to 60 seconds Default 5 A thermal control band for Channel 1 heating that defines where the rate derivative function begins This band is in multiples of the heat proportional band This parameter will not appear if PB1H is set to 0 Range 0 to 7 times the PB1H 0 denotes rate is always functional Default 0 50 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 SETUP Menu The area for Channel 1 where no heating or cooling takes place in a ach a heat cool proportional control Range 36 to 36 F 20 to 20 C 20 to 20 Units 3 6 F 2 0 to 2 0 C 2 0 to 2 0 Units Default 0 PBIC A temperature band expressed in degrees within which a temperature controller proportioning function is active for Channel 1 cooling Range 0 to 900 F 0 to 500 C 0 to 500 Units 0 0 to 90 0 F 0 0 to 50 0 C 0 0 to 50 0 Units Default 45 F 25 C 25 Units 4 5 F 2 5 C 2 5 Units RSIC Reset integral cooling control action for Channel 1 that automatically eliminates offset or droop between set point and actual process temperature in a proportional control Expressed in repeats per minute This parameter will not appear if PB1C is set to 0 Range 0 00 to 5 00 repeats minute Default 0 00 The rate derivative cooling function for Channel 1 of the Series 922 The rate is determined by how fast the error being co
47. TD The Dry Bulb Installation We suggest you mount the dry bulb RTD at a location in your process or system where it reads an average temperature Air flow past this sensor should be moderate The sensor should be thermally insulated from the sensor mounting RTD The Wet Bulb Installation One way to prepare the RTD wet bulb sensor for reading relative humidity on Channel 2 is to slip a cotton wick over the sensor sheath Watlow Part 0830 0111 0000 or an equivalent Put one end of the wick in water Some systems use a small trough of water with a float valve to replenish the evaporating liquid Use distilled water to avoid mineral deposits on the wick that can change the RH reading The wicking distance should be as short as practical The cotton wick must be free of any sizing and starch The float valve trough systems should also remove the water when the ambient temperature goes below freezing or above boiling To obtain valid RH readings air flow past the RH sensor must be sufficient to evaporate the maximum amount of water from the wick without drying it out Evaporation cools the sensor the amount of cooling relates directly to the relative humidity present Thermally insulate the wet bulb sensor from the sensor mounting This pre vents mounting surface heat from flowing into the sensor sheath and changing the wet bulb temperature The result of such heat flow will be a humidity reading higher than actual Thermocouple I
48. Your Control to Work Three Steps Once your control is installed and wired getting the Series 922 up and running is a three part process e First match the control s personality to your system in what we call the SETUP menu that is input type units of measure range calibration offset output action alarm type lockout e Second tune the control making final PID entries e Third enter up to ten separate profiles in the PROGRAM menu 8 WATLOW Series 922 User s Manual Starting Out Chapter 1 Before going further open the Series 922 and pull the control chassis from its case Here s how How to Open the 922 The control chassis fastens to the case with a single screw located on the lower front panel See Figure 2 Turn the screw counterclockwise to loosen it Three or four strip connector plugs in the rear of the control chassis feed power and signals through the back of the casing to the triple terminal strip These plugs will let go as you pull A CAUTION The front panel When removing the Series 922 Control from its case pull firmly but gently When Screw t ths 90 returning the control to the case be sure you have the top up to match the plugs only Do not apply with the case The 922 will not fit in to the case upside down Always check to excessive force or see that it is oriented correctly Press the unit in firmly then turn the front panel turn the screw more screw clockwise to secure it than 90
49. aded parameters may not appear on your control They are dependent on your control configuration Represents the current set point for Channel 1 Range RiL and R1H Default 73 F 23 C whole for Channel 1 only Range R2L and R2H Default 73 F 23 C whole One of three main level operating menus From the SYSTEM menu you can generate a non ramp set point fixed manipulate Events 1 through 8 ON or OFF clear system errors and clear latching alarms 73 4 F 23 0 C tenths Represents the current set point for Channel 2 SP2 will not appear if TYP under the SPCLFUNC menu is set up for T Temperature for Channel 1 only or for P Process 73 4 F 23 0 C tenths Represents the current value of the process variable from the sensor inputs for Channel 2 C2 will not appear if TYP under the SPCLFUNC menu is set up for T Tempera ture for Channel 1 only or P Process for Channel 1 only RH only appears if TYP TH TV orP V How To Program the Series 922 Chapter 6 43 WATLOW Series 922 User s Manual SYSTEM Menu m _ ia V Ev2 ea E C E CLR ALARM RETURN This auxiliary output can be an alarm or event Events may be turned ON or OFF in the HOLD mode EV1 will only appear when AUX1 EV under the SPCLFUNC menu and when the external event output board is connected Range OFF or ON Default OFF This auxiliary output can be an alarm or e
50. and reset DIP Switch 1 to OFF The program memory is now cleared If you haven t done so already attach your sensor as described in Chapter 4 14 WATLOW Series 922 User s Manual Sample Program Chapter 3 Sample Program Enter Real Time First set the Series 922 s real time of day 24 hour clock Remember that the MODE key is used to step through the menus The UP DOWN keys are used to select parameters and values and remain flashing until you press the ENTER key 1 Press the MODE key until the SETUP menu appears Press the ENTER key 2 AtACCESS select 0 with the UP DOWN keys Press ENTER This is the calibration CALIB menu 3 Press the MODE key until HOUR appears in the alphanumeric display Note that hours are in a 24 hour format 4 Use the UP DOWN keys to place hours into the display The display flashes until you press ENTER 5 Press MODE to continue to the MIN parameter Enter the correct value for minutes and press ENTER 6 Press the MODE key several times to return to the top of the ACCESS 0 menu At the ACCESS 0 prompt which is the CALIB menu you see the Real Time TI displayed 7 Continue to press MODE until you reach RETURN Press ENTER to return to SYSTEM Before Entering Your Program Before we begin to program your Series 922 there are a few other initial SETUP parameters to enter If you haven t tried any programming since your cold start the C F U Celcius Fahrenheit Units and GS Guar
51. anteed Soak parameters are set to their appropriate values Refer to the glossary for a more detailed definition If you have already tried stepping through the parameters and entering values it might be a good idea to go back and double check to see that the values are correct 1 Press the MODE key until SETUP appears Press ENTER Once again you see the ACCESS parameter Use the UP DOWN keys to enter 5 and press ENTER this is the Special Function SPCLFUNC menu 2 Press MODE again until you see the C F U parameter This parameter defaults to F Use the UP DOWN keys to enter degrees F Fahrenheit Press ENTER Sample Program Chapter 3 NOTE When either the hours or minutes are entered internal seconds are set to 0 NOTE DIP Switch 2 must be OFF to access all SPCLFUNC parame ters WATLOW Series 922 User s Manual 15 16 Sample Program Skip Step 3 if you do not have an external event board connected NOTE EV1 and EV2 will not appear unless the Event Output board is con nected and AUX1 and 2 are events 3 Continue through the menu with the MODE key until you see AUX1 Use the UP DOWN keys to enter AUX1 as an event EV and press ENTER Do the same for AUX2 Default is AL Alarm Continue through the SPCLFUNC menu until you see GS Guaranteed Soak Enter a value of 0 press ENTER This parameter defaults to 0 Press the MODE key to move to the RETURN parameter Press ENTER to return to SYST
52. atches and does not have to be performed again Run your program from FILE 5 STEP 1 If you do not want to go through the entire program you can START your program at any STEP in FILE 1 or 5 When your program reaches FILE 5 STEP 6 the HOLD LED begins flashing This means your program is still running but it is HOLDing to WAITFOR the ACTUAL temperature to equal the WAITFOR Channel 1 W1 When they are equal the HOLD LED stops flashing Your program continues to the last step a STOP step and HOLDs again In the HOLD mode the Series 922 controls the process to the set points of the last SP step If you want to change a programmed step return to the PROGRAM menu and enter the FILE and STEP number you want changed Use the UP DOWN keys to select another step type and press ENTER To clear all parameters under a step type of its programmed values return to that step type and press ENTER All parameters return to their defaults Sample Program Chapter 3 WATLOW Series 922 User s Manual 19 Sample Program RUN Menu NOTE Shaded parameters may not appear on your control These parameters are dependent on how your control is configured See Chapier 6 for more information Figure 8 RUN Key Flow Diagram 20 WATLOW Series 922 User s Manual Running Your Series 922 To run your Series 922 you must be at one of the three main level operating parameter menus SYSTEM PROGRAM or SETUP Press the RUN HOLD key The Series
53. ation alarm for Alarm 2 of the Series 922 Displayed only when AUX2 AL Appendix BAUD CAL1 CAL2 CALIB C F U Closed Loop CLR FILE Cold Start COM COM ID CT1C CT2C CT1H CT2H Cycle time DAY DB1 DB2 Dead band Derivative Deviation Appendix Represents the baud rate 1200 2400 4800 9600 that serial Glossary B j D communications will be running at This parameter will not appear under ACCESS 5 of the SPCLFUNC menu if your Series 922 does not have communications An offset of the process variable for Channel 1 or Channel 2 This number is added to the value that the system derives The final result is used for the set point as well as a front panel indication In the Series 922 when ACCESS 0 is entered under the SETUP menu the CALIB parameters appear These parameters setup the Real Time and the calibration offset of the process variable Accepts the sensor input and scales it to degrees Celsius Fahrenheit or Units of measure Control system that has a sensing device for process variable feedback Allows the operator to clear a file of the Series 922 A clean or completely cleared of user program information start up condition Factory settings Represents the selection of the protocol type for serial communi cations This selects XON XOFF protocol or ANSI X3 28 communication protocol under the ACCESS 5 SPCLFUNC menu This parameter will not appea
54. ayed only when AUX2 AL and an external event board is connected ALTYP2 parameter selects a process or deviation alarm This parameter will not appear if TYP under the SPCLFUNC menu is set to T Temperature for Channel 1 only or P Process for Channel 1 only Process Range R2L to R2H R2L 10 to R2H 10 Process Default R2H R2H 10 Deviation Range 0 to 999 F 0 to 555 C Deviation Default 999 555 A2H How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 49 SETUP Menu A2L RETURN ACCESS 1 CH1 PB1H RS1H RT1H E CT1H RB1H w C The low process alarm or low deviation alarm for Output 2 of the Series 922 Displayed only when AUX2 AL and an external event board is present ALTYP2 parameter selects a process or deviation alarm This parameter will not appear if TYP under the SPCLFUNC menu is set to T Temperature for Channel 1 only or P Process for Channel 1 only Process Range R2L to R2H R2L 10 to R2H 10 Process Default R2L R2L 10 Deviation Range R2H or 555 C 55 5 C 999 F U 99 9 F U to 0 Deviation Default Low end value From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to ACCESS 0 menu by pressing the MODE key In the SETUP menu ACCESS 1 must be selected to enter the PID parameters When ACCESS 1 is entered under the SETUP menu of the Series 922
55. capability to perform four basic jumploop types in your programming The backward jump forward jump nested loops and intertwining loops These are only definitions of the four loops The Series 922 has very few rules concerning loops in your program Backward Jump The Backward jump is the most common jump A backward jump will force you to a step already performed The Jump Step JS must be less than the current step You cannot JUMPLOOP to the step that you are on Step 2 SETPOINT Step 3 SETPOINT Step 4 SETPOINT Step 5 JUMPLOOP JS 02 JC 01 Step 6 STOP The steps in sequence will be 2 3 4 5 2 3 4 5 6 Your Jump Count JC can be anything from 0 100 If you enter 0 this will be an infinite loop and will never progress to Step 6 Forward Jump The next loop type is a Forward jump By definition you can jump forward The Jump Step must be greater than this step Step 1 SETPOINT Step 2 SETPOINT Step 3 JUMPLOOP JS 05 JC 01 E 4 SETPOINT Step 5 STOP The steps in sequence will be 1 2 3 5 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 Jumploops A Nested loop is a jump loop within a loop You are forced to a step either forwards or backwards from your present location When nested loops are performed they cannot break across other loops Your JC can be from 0 100 with 0 being an infinite looping Nested Loop Step 1 SETPOINT ct Step 2 SETPOINT Step 3 JUMPLOOP JS 0
56. ctor for communication and events 8 8 in 223 52 mm e Weight 2 8 Ib 1 27 kg Appendix WATLOW Series 922 User s Manual 69 92 2 A 0 0 0 0 SSS LIVIVIY Series 922 Dual channel microprocessor based dual input quad output ramping controller 99 steps 1 4 DIN Input 1 DualRTD 1 2 RTD 1 and process 3 Type T thermocouple and process 4 Dual process 5 Dual Type T thermocouple 6 DualRTD0 1 7 RTD 0 1 and process 8 Dual Type K thermocouple 9 Dual Type J thermocouple A Type K thermocouple and process B Type J thermocouple and process Output Per Channel BB Dual solid state relay Form A 0 5A with RC contact suppression CC Dual switched DC non isolated FB Process 4 20mA non isolated solid state relay Form A 0 5A with RC contact suppression Communications A None B Isolated RS 423 232C compatible C Isolated RS 422 Auxiliary event board Remote event alarm output board Cable Length 18 18 0 in 457 mm Other lengths contact factory Event Output C2 2 event outputs switched DC non isolated C8 8 event outputs switched DC non isolated B2 2 event outputs solid state relay Form A 0 5A with RC contact suppression B8 8 event outputs solid state relay Form A 0 5A with RC contact suppression K2 2 event outputs solid state relay Form A 0 5A without RC contact suppression K8 8 eve
57. d a front panel lockout feature Starting Out Chapter 1 WATLOW Series 922 User s Manual 7 The Series 922 is a dual channel PID controller You may input individual sets of PID parameters for each output This includes rate reset proportional band and cycle time By setting the proportional band s to zero the Series 922 becomes a simple ON OFF control with a 3 F or 1 7 C switching differential Two of the Series 922 s auxiliary outputs may be alarms or events An event is an ON OFF auxiliary output relay signal You can use events based on time to trigger peripheral equipment or processes Depending on your individual system needs you may order an external event board with two or eight outputs Operator friendly features include automatic entry codes or prompts to aid in setup When there s a power outage the Watlow Series 922 stores all informa tion in a nonvolatile memory When you first apply power the unit will come up with default values for set points and control parameters These default values provide minimum operating information for the control until you program in the desired data The default values are listed in the Master Step Menus and Charts pp 46 61 Remove the Series 922 carefully from its shipping container Be sure to set this literature aside where it will not be discarded Packing List Included with your Watlow Series 922 are two mounting brackets with integral screws and this manual Put
58. d be able to get around on your own Remember that the MODE key takes you through the menus Use the UP DOWN keys to select parameters values and step types Press ENTER and your information is entered 1 Return to the PROGRAM menu 2 Enter FILE 1 Step 4 We are going to change this step type from a STOP step to a SETPOINT step This is our second ramp Use Table 3 to enter values into the corresponding parameters 3 Once you have edited your program run it again and watch its progress FILE STEP STEP SP1 HOUR MIN SEC EV1 EV2 JS JC TYPE Table 3 1 4 SETPOINT 125 0 0 25 OFF ON Editing Your 1 5 SETPOINT 125 0 0 25 OFF ON Program 1 6 JUMPLOOP 1 2 Steps 4 7 1 7 STOP Step 6 Jumps to Step 1 and repeats program twice JC 2 125 100 75 Temp F Step 1 Initializes 7 50 Set Point Edit Program O 10 20 30 40 50 60 70 80 90 100 Time seconds Sample Program Chapter 3 WATLOW Series 922 User s Manual 17 Sample Program Adding AUTOSTART and LINKing Files The Series 922 gives you the capability to link files together The LINK step allows you to link the last step of a profile to the first step of another profile We are going to edit the program again by adding a LINK step at the end of the profile First we must create another file If you try to run your program with a LINK that goes to a non
59. e 50 to 50 units or C 5 0 to 5 0 for tenths or 90 to 90 F 9 0 to 9 0 for tenths Default 0 _ CALI An offset of the process variable for Channel 2 This number is added to the value that the system derives The final result is used for the control point CAL2 will not appear if TYP under the SPCLFUNC menu is set up for T Temperature for Channel 1 only or for P Process for Channel 1 only Range 50 to 50 units or C 5 0 to 5 0 for tenths or 90 to 90 F 9 0 to 9 0 for tenths Default 0 CAL2 AIH When AUX1 AL and an external event board is connected the Series 922 will display this parameter representing the high process alarm or high deviation alarm for Output 1 ALTYP1 parameter selects a process or deviation alarm Process Range R1L to R1H R1L 10 to R1H 10 Process Default R1H R1H 10 Deviation Range 0 to 999 F 0 to 555 C Deviation Default 999 555 This parameter represents the low process alarm or low deviation alarm for Output 1 of the Series 922 Displayed only when AUX1 AL and an external event board is connected ALTYP1 parameter selects a process or deviation alarm Process Range R1L to R1H R1L 10 to R1H 10 Process Default RiL R1L 10 Deviation Range R1H or 555 C 55 5 C 999 F U 99 9 F U to 0 Deviation Default Low end value AiL Represents the high process alarm or high deviation alarm for Output 2 of the Series 922 Displ
60. e WAITFOR Step 20 Running Your Series 922 21 How to Install and Wire the Series 922 Chapter 4 Install and Wire 21 Sensor Installation Guidelines 22 Input Power Wiring 23 Definitions 23 The Dos and Don ts of Clean Input Power 24 How to Check for Ground Loops 24 How to Eliminate Noise 24 Noise Suppression Devices Available from Watlow 24 Line Filtering Configurations For Controls 26 Installation Information 26 Installation Procedure 28 Series 922 Power Wiring 29 How to Wire the Series 922 29 Input Wiring 32 Output Wiring 33 Event Output Board 35 System Wiring Example Contents WATLOW Series 922 User s Manual 3 Tuning Programming Alarms Appendix Terminology Quick Reference Page ltem How to Tune the Series 922 Chapter 5 Recommended Tuning Reference Using a Chart Recorder Tuning How to Program the Series 922 Chapter 6 Write Out Your Program Select the Proper DIP Switch Settings Event Input Remote Hold Input Event Outputs Guaranteed Soak The Four JUMPLOOP Types JUMPLOOP Rules to Follow Programming in General SYSTEM Menu SETUP Menu PROGRAM Menu How to Use the Series 922 Alarms Chapter 7 Alarm Relay Configuration Number of Alarms Alarm Types The Operating Band Alarm Limits Alarm Function Latching or Non Latching Clearing an Alarm Message An Alarm And The State Of The Alarm Relay Appendix Specifications Model Number Information Thermocouple Field Calibration Proc
61. e is running If exceeded the step time clock stops until the actual temperature is within the soak window 0 Guaranteed Soak is not active gt 0 Guaranteed Soak Window active Only applies to Channel 1 Range 0 to 90 F 0 to 50 C 0 to 50 Units 0 to 9 0 F 0 to 5 0 C 0 to 5 0 Units Default 0 How To Program the Series 922 Chapter 6 SETUP Menu AUN AUX2 ALTYP1 ALTYP2 LAT RTD ALT WATLOW Series 922 User s Manual 55 SETUP Menu Allows the operator to select which parameter the analog retransmit signal represents For a chart recorder output select C1 or C2 Fora remote set point signal to slave controls select SP1 or SP2 C2 and SP2 will not appear if the TYP parameter is T or P See SCALE parameter below for further explanation C1 Channel 1 actual C2 Channel 2 actual SP1 Set point channel 1 SP2 Set point channel 2 Range C1 C2 SP1 SP2 Default C1 ANLG Allows the operator to scale the analog retransmit output for a certain number of millivolts per least significant digit of the value Reference 0 units 0 volts Range 1 2 5 10mV Default 1 SCALE COM Represents the selection of the protocol type for serial communi cations This selects XON XOFF protocol or ANSI X3 28 communica tion protocol This parameter will not appear if your Series 922 does not have communications Range XON or STX Default STX BAUD Represents
62. e unit of measure code Celcius Fahrenheit Units Not displayed if DIP Switch 2 is ON TYP Enter actual process display to be shown Temperature Process Humidity Dual T C TTorT Dual RTD TTorTHorT Dual RTD 0 1 TTorTHorT 0 1 RTD Process TPorTVorT T C Process TPorTVorT RTD Process TPorTVorT Dual Process PPorPVorP Not displayed if DIP Switch 2 is ON Enter the control output for Channel 1 Outputs 1 and 2 Heat PID Cool PID HTCL Cool PID Heat PID CLHT Not displayed if DIP Switch 2 is ON Enter the control output for Channel 2 Outputs 3 and 4 Heat PID Cool PID HTCL HTCL Cool PID Heat PID CLHT Not displayed if DIP Switch 2 is ON Dependent on TYP Enter the Range Low value for Channel 1 Dependent on input selection Not displayed is DIP Switch 2 is ON See your TYP parameter setting R1H Enter the Range High value for Channel 1 Dependent on input selection Not displayed if DIP Switch 2 is ON See your TYP parameter setting R2L Enter the Range Low value for Channel 2 Dependent on input selection Not displayed if DIP Switch 2 is ON Dependent on TYP See your TYP parameter setting R2H Enter the Range High value for Channel 2 Dependent on input selection Not displayed if DIP Switch 2 is ON Dependent on TYP See your TYP parameter setting AUX1 Enter the Auxiliary Output 1 AUX1 AL Alarm output AL AUX 1 EV Event output Not displayed if DIP Switch 2 is ON Dependent on event board AUX2 Enter the Auxiliary Output 2 AUX2 AL Alarm o
63. econds Default 5 CH2H A thermal control band for channel 1 heating that defines where the rate derivative function begins This band is in multiples of the heat proportional band This parameter will not appear if PB2H is set to 0 or T or P Channel 1 only in the TYP parameter under the SPCLFUNC menu have been selected Range 0 to 7 times the PB2H 0 denotes rate is always functional Default 0 RB2H DB2 C The area for Channel 2 where no heating or cooling takes place in a heat cool proportional control This parameter will not appear if T or P Channel 1 only have been selected in the TYP parameter under the SPCLFUNC menu Range 36 to 36 F 20 to 20 C 20 to 20 Units 3 6 to 3 6 F 2 0 to 2 0 C 2 0 to 2 0 Units 20 to 20 RH Default 0 A temperature band expressed in degrees within which a temperature controller proportioning function is active for Channel 2 cooling This parameter will not appear if T or P Channel 1 only have been selected in the TYP parameter under the SPCLFUNC menu Range 0 to 900 F 0 to 500 C 0 to 500 Units 0 0 to 90 0 F 0 0 to 50 0 C 0 to 50 0 Units 0 to 500 RH Default 45 F 25 C 25 Units 4 5 F 2 8 C 2 5 Units 25 RH PB2C Reset integral cooling control action for Channel 2 that auto matically eliminates offset or droop between set point and actual process temperature in a proportional control Expressed in repeats p
64. ed is gt or to 99 Enter steps only to 99 No file found Check your program retransmit No step found Check your program No asterisk input allowed Follow proper format for entering asterisks Infinite loop error Check the number of consecutive loops retransmit File change error An attempt to resume a changed file occurred Check your program WATLOW Series 922 User s Manual 87 Series 922 Response to Error Codes ER1 Codes Shut Down Outputs The Series 922 will shut down its outputs whenever an ER1 code occurs An ER1 code usually represents a Series 922 malfunction Check These Items First Anytime you see an ER1 error code check for these four items first then follow the recommended action listed by the code a Lowline voltage b Noisy environment noise event c Vibration d Temperature or moisture over specification ER2 Codes Do Not Shut Down Outputs ER2 error codes are data communication system related or file programming related Series 922 Alarm Messages ALM1__ Hl occurring ALM1___LO occurring ALM2__ Hl occurring ALM2___LO occurring Clearing an Error Code To clear an Error Code from the alphanumeric display first correct the problem then return to the SYSTEM menu Use the UP DOWN keys to reach the ER1 or ER2 parameter and press ENTER Press ENTER or transmit a 0 If the code returns or if the 922 replies to a data communicated ER1 or ER2 query with the same code the problem
65. edure RTD Field Calibration Procedure Process Field Calibration Procedure Glossary Index Warranty Returning Merchandise Shipping Claims Watlow Controls Series 922 Error Codes Alarms Series 922 Quick Reference 4 WATLOW Series 922 User s Manual Contents Figures Page Item Figures 7 Series 922 Input and Output Overview Figure 1 9 How to Open the Series 922 Figure 2 10 DIP Switch Location and Orientation Figure 3 11 Overview of the Series 922 Figure 4 12 Series 922 Front Panel Information Figure 5 13 Actual and Alphanumeric Display Front Panel Information Figure 6 13 Keyboard Front Panel Information Figure 7 20 RUN Key Flow Diagram Figure 8 25 Differential Mode Filter Diagram Figure 9 25 Common Mode Filter Figure 10 25 Combination Differential Common Mode Filter Diagram Figure 11 26 Series 922 Faceplate Dimensions Figure 12 27 Series 922 Dimensions Side View Figure 13 27 External Event Alarm Board Dimensions Side amp End view Figure 14 27 Series 922 Panel Cutout Dimensions Figure 15 28 Series 922 Power Wiring Diagram Figure 16 29 Input Option 1 amp 6 Dual RTD Wiring Diagram Figure 17 30 Input Option 2 amp 7 RTD Process Wiring Diagram Figure 18 30 Input Option 3 T C and Process Wiring Diagram Figure 19 31 Input Option 4 Dual Process Wiring Diagram Figure 20 31 Input Option 5 Dual T C Wiring Diagram Figure 21 32 Dual S S Relay Output Option BB Wiring Diagram Figure 22 32 Solid State Switch Option
66. ely maintains the set point and event output conditions which exist 38 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 Event Outputs Events GS Another feature of the Series 922 is its capability for up to eight event outputs via an external event output board You have the option of ordering your 922 without events or adding an external board for two or eight outputs An event output is simply a pre programmed ON OFF event per program step The event may turn any number of peripheral devices ON or OFF to assist you in controlling your process system or environment For instance in an environmental chamber you might wish to circulate air at a given time in your program for one or more steps You may want to turn lights ON or OFF or signals lock out your humidifier or activate a video recorder EV1 and EV2 are not visible under the SYSTEM menu until you select AUX1 amp AUX2 as events in the SETUP menu and the two or eight event output board is connected Enter the SETUP menu and enter ACCESS 5 This is the SPCLFUNC Special Function parameter Press the MODE key until you reach the AUX1 parameter and press ENTER The default for AUX1 and AUX2 is AL Alarms Change the value to EV Events if it hasn t already been done If you return to the SYSTEM menu EV1 and EV2 are visible and can be turned ON or OFF from here EV1 and EV2 can also be viewed under the SETPOINT parameter in the PROGRAM menu EV3
67. er minute This parameter will not appear if PB2C is set to 0 or T or P Channel 1 only in the TYP parameter under the SPCLFUNC menu have been selected Range 0 00 to 5 00 repeats minute Default 0 00 RS2C The rate derivative cooling function for Channel 2 of the Series 922 The rate is determined by how fast the error being corrected is increasing Expressed in minutes This parameter will not appear if PB2C is set to 0 or if T or P Channel 1 only in the TYP param eter under the SPCLFUNC menu have been selected Range 0 00 to 5 00 minutes Default 0 00 RS2C 52 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 The cooling cycle time for Channel 2 expressed in seconds for a controller to complete one ON OFF cycle Time between successive turn ons This parameter will not appear if Your Series 922 has a 4 20ma output and OUT2 under the SPCLFUNC menu is set to CLHT PB2C is set to 0 or T or P Channel 1 only in the TYP parameter under the SPCLFUNC menu has been selected Range 1 to 60 seconds Default 5 A thermal control band for Channel 2 cooling that defines where the rate derivative function begins This band is in multiples of the cool proportional band This parameter will not appear if PB2C is set to 0 or T or P Channel 1 only in the TYP parameter under the SPCLFUNC menu has been selected Range 0 to 7 times the PB2C 0 denotes rate is always functional Default 0
68. ermines a warm or cold start A warm start will save all programmed information in the 922 s memory backup A cold start is a clean startup condition all user programmed information is deleted Your Series 922 leaves the factory programmed for a warm start DIP Switch 2 selects whether all SPCLFUNC parameters will be displayed or not DIP Switch 3 determines whether the decimal point will be displayed in tenths of units for 0 5V or 4 20mA input and DIP Switch 4 is for 0 5VDC 0 20mA input or 1 5VDC 4 20mA input selection DIP Switch 5 is not used and DIP Switch 6 is a factory test cali brate switch Changing the Position of a Switch Whenever you change the position of a DIP switch follow this procedure 1 Remove power from the Series 922 Turn the front panel screw 90 counter clockwise 2 Grip the front panel bezel and pull it straight out from the control case The control chassis will come out of the case as you pull the bezel 3 Set the DIP switch to the position you want 4 Return the control chassis to the case Be sure you have it oriented correctly It will not fit in upside down but check just the same Press firmly but gently to seat the chassis Starting Out Chapter 1 922 Overview Overview of the Three Operating Modes Before getting into the details of the Series 922 s keys and displays take a look at Figure 5 showing the three different modes After you feel comfortable with the names of the m
69. eters See below A2L Enter the Alarm 2 Low value Displayed if AUX2 AL Dependent on AUX2 ALTYP2 and TYP parameters See below RETURN Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the CALIB prompt Process Default amp High Slew Limit Deviation Default Range Process Default amp Low Slew Limit 1382 F 750 C 999 F 555 C U 32 F 0 C Deviation Default 999 F 555 C U 2282 F 1250 C 999 F 555 C U 328 F 200 C U 999 F 555 C U 662 F 350 C 999 F 555 C U 328 F 200 C 999 F 555 C U 100 555 0 555 RTD Whole 1112 F 600 C 999 F 555 C U RTD Whole 328 F 200 C 999 F 555 C U RTD Tenths 392 0 F 200 0 C 999 F 555 C U RTD Tenths 99 9 F 99 9 C 999 F 555 C U 0 5 Whole 1985 F 1985 C 999 F 555 C U 0 5 Whole 117 F 117 C 999 F 555 C U 0 5 Tenths 198 5 F 198 5 C 999 F 555 C U 0 5 Tenths 11 7 F 11 7 C 999 F 555 C U 4 20 Whole 1985 F 1985 C 999 F 555 C U 4 20 Whole 285 F 285 C 999 F 555 C U 4 20 Tenths 198 5 F 198 5 C 999 F 555 C U 4 20 Tenths 28 5 F 28 5 C Description ACCESS 1 PID To enter PID parameters use ACCESS 1 amp press ENTER Range Default
70. existing file you will receive ER2 0036 This error means no file found Follow Table 5 to add a LINK and a new FILE to your program The 922 can also automatically start your program or a step on a specified day and time When you use an AUTOSTART in your program it stops your program and waits for the day and time you entered under the AUTOSTART step type The Series 922 then executes the next sequential step AUTOSTART allows you to wait up to seven days in the future day 0 is always the current day The days accumulated increases by 1 every time the Real Time clock goes from 23 59 to 00 00 If O is programmed for DAY and the Real Time clock is greater than the Table 5 programmed AUTOSTART time the AUTOSTART waits 6 days along with the LINKing to Another File with Programmed time AUTOSTART FILE STEP STEP TYPE SP1 DAY HOUR MIN SEC EV1 EV2 FILE 1 LINK 5 AUTOSTART 0 current current 5 SETPOINT 175 0 50 ON ON SETPOINT 175 SETPOINT 100 SETPOINT 100 SETPOINT 75 STOP 0 1 15 ON OFF 0 10 ON OFF 0 25 OFF OFF oDDD O1 aA aAa aAa oaoa oA N J JO1 amp G PO o Run your program again beginning at FILE 1 STEP 8 Step through the menu to see what step type you are on and your time remaining Watch to see what happens at the end of File 1 The AUTOSTART waits for approximately 5 minutes into the future before continuing with
71. hannel 1 CH2Z XXXX for Channel 2 ENTER OmA press ENTER Allow 10 seconds for stabilizing press the ENTER key 7 Press the MODE key until CH1G XXXX appears on the alphanumeric display for Channel 1 CH2G XXXX for Channel 2 Input 20mA press ENTER The unit is now calibrated for Channel 1 process inputs The process readings on the ACTUAL display should be at the R1H or R2H setting 8 Remove power from the Series 922 Remove wires from 6 and 8 for Channel 1 3 and 5 for Channel 2 Set DIP Switch 6 to the OFF position Appendix WATLOW Series 922 User s Manual 75 Glossary A B 76 Glossary This glossary includes general thermal system control terms ACCESS Actual Display data Alarm ALTYP1 ALTYP2 Analog retransmit Anti reset Automatic Prompts AUTOSTART AUX1 AUX2 A1H AIL A2H A2L WATLOW Series 922 User s Manual In the SETUP menu of the Series 922 an ACCESS number 0 1 3 5 must be selected to enter the personality of your Series 922 into the CALIB PID DIAGNOS and SPCLFUNC Any other number will return to SYSTEM Displayed information which gives the operator programmer real or actual data i e actual process temperature See Pro grammed display data A condition generated by the Series 922 indicating that the process has exceeded or fallen below the set or limit point Present only when AUX1 AL Determines whether the alarm type for A
72. he A C supply lines as a result of lightning strikes switching large motors etc The MOV is available in several varieties and for 115 or 230 volt lines The device dissipates the voltage spikes to ground and in doing so repeatedly deteriorates its ability to function MOVs have a limited life Islatrols and other similar power line filters are designed to carry the power for the control circuit and buffer the control circuit from A C line noise Devices like the Islatrol use media electromagnetic filtering other than electric circuits to filter out electrical noise Take care in matching the power capabilities of the filter with power demands of the circuit Keep line filters as close to the control as possible to minimize the area for interference pick up Noise Suppression Devices Available From Watlow Watlow Winona stocks a few key noise suppression parts You may order these by calling your local Watlow distributor Item Electrical Ratings Part Number Table 7 Differential Mode Line Filter Refer to the Islatrol listing below Noise Suppression Metal Oxide Varistor 150V 80 Joule 0802 0273 0000 Device Ratings MOV 275V 75 Joule 0802 0266 0000 24 WATLOW Series 922 User s Manual How to Install and Wire Chapter 4 Line Filtering Configurations for Controls These three diagrams show you filter configurations for removing input power noise Choose the one best suited for your system if you are unsure
73. he SPCLFUNC prompt 48 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 Shaded parameters may not appear on your conirol They are dependent on your control configuration S ETU P M enu One of three main level operating menus From the SETUP menu you SETUP can set up or change system operating parameters such as real time high low range alarm types alarm points PID settings and communica tions You must select each ACCESS number to create the personality of your Series 922 0 ACCESS number 0 must be selected to enter the personality of your Series 922 into the CALIB parameters In the Series 922 when ACCESS 0 is entered under the SETUP menu the CALIB parameters appear These parameters setup the Real Time and the calibration offset of the process variable CALIB Represents the current Real Time hours and minutes of the Series 922 s System Midnight 0 hours and 0 minutes Read only parameter gt Q O m n n TI 00 00 Represents the SYSTEM 24 hour time of day clock for hours HOUR l Range 0 to 23 hours Default 0 The SYSTEM 24 hour time of day clock setting for minutes MN Range 0 to 59 minutes Default 0 An offset of the process variable for Channel 1 This number is added to the value that the system derives The final result is used for the control point Rang
74. he key down to increase the displayed value at a rapid rate 90 Front Panel Screw Secures the control chassis in its case with a 1 4 turn clockwise or releases the chassis with a 1 4 turn counter clockwise ENTER Key Enters selected flash ing data into the micro processor memory This will clear an error code or latched alarm indica tions when the ACTUAL display value returns to within the alarm limit How to Use Keys and Displays Chapter 2 WATLOW Series 922 User s Manual temperature in degrees Fahrenheit When both C and F LEDs are OFF the 922 is displaying Process Variable Units PVUs C LED Indicates the value in the ACTUAL display is temperature in degrees Celsius Figure 6 Actual and Alphanu meric Display Front Panel Information Figure 7 Keyboard Front Panel Information a Run Hold LEDs When the HOLD LED is ON steady the 922 is in a HOLD condition When the HOLD LED flashes the unit is in a WAITFOR step or has exceeded the guaran teed soak deviation When the RUN LED is ON the 922 is in the RUN condition When the RUN LED is flashing the program is being held by the remote hold input 13 Sample Program WARNING Doing a cold start will cause all SETUP parameters and files to be lost DO NOT put DIP switch 1 in the one position unless all user programmed information is to be cleared Chapter 3 Learning the Series 922 A Sample
75. heating elements sensors electronic temperature controls and power switching devices The Winona operation has been designing solid state electronic control devices since 1962 and has earned the reputation as an excellent supplier to original equipment manufacturers These OEMs depend upon Watlow Controls to provide compatibly engineered controls which they can incorporate into their products with confidence Watlow Controls resides in a 100 000 square foot marketing engineering and manufacturing facility in Winona Minnesota 86 WATLOW Series 922 User s Manual Appendix Series 922 Error Codes Alarms ER1 Error Codes and Actions 1 Internal RAM failure Contact factory 2 External RAM failure Contact factory 3 Bad battery error Contact factory 4 Channel 1 A D conversion error check sensor or contact factory 5 Channel 2 A D conversion error check sensor or contact factory 6 Ground A D conversion error contact factory 7 High reference A D conversion error contact factory 8 Channel 1 interpolation overrange Check specification for sensor input range 9 Channel 2 interpolation overrange Check specification for sensor input range 10 D A gain error Contact factory 11 Channel 1 zero error Contact factory 12 Channel 1 gain error Contact factory 14 Channel 2 zero error Contact factory 15 Channel 2 gain error Contact factory 18 Stack overflow error Contact factory NOTE If an error or alarm flashe
76. hen is limit trips LS Q ESI 140A 16XX 6000 LI High Limit Control O 9 Fuse i High Limit Mechanical Load 5600 Power O Contactor id m oa lt TC Input L2 Heater Normally Open Momentary Dry Teme Switch RTD Sensor Limit Sensor Oven Wet Bulb RTD Sensor WARNING With Watlow mercury relays load must have a unity power factor For RESIS TIVE LOADS ONLY How to Install and Wire Chapter 4 WATLOW Series 922 User s Manual 35 Chapter 5 How to Tune the Series 922 This chapter will explain tuning the 922 to the system it controls Recommended Tuning Reference There are a number of quality references on the art of tuning electronic controllers to the systems they control If you are not an instrument technician qualified to tune thermal systems we suggest that you obtain and become familiar with the reference below before attempting to tune your system Remember that the time you spend tuning your system is relative to the quality of control you need Tuning of Industrial Control Systems Armando B Corripio Published by the Instrument Society of America Using A Chart Recorder The tuning procedure will be greatly simplified if you use a chart recorder to assist in tuning the Series 922 Connect the chart recorder to the analog retransmit signal The analog retransmit signal provides a chart recorder output represented by C1 or C2 Actual process variable or SP1 or SP2 Set Point temperature
77. ies keep original clean Evi Events ON or OFF EV2 EV3 _EV4 EV5 EV6 EV EV8 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK Step Type To FILE Values EV1 Events ON or OFF EV2__EV3 EV4 EV5 __EV6 EV EV8 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK Step Type To FILE EV1 Events ON or OFF EV2__EV3 EV4 EV5 _EV6 EV EV8 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK Step Type To FILE Values EV1 Events ON or OFF EV2__EV3 EV4 EV5 _EV6 EV EV8 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK Step Type To FILE Values EV1 Events ON or OFF EV2__EV3 EV4 EV5 _ _EV6 EV EV8 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK Step Type To FILE Values Events ON or OFF EV3 EV4 EV5 EV6 JUMPLOOP WAITFOR WHR WMN AUTOSTART DAY HR MN STOP LINK
78. ined Loop 41 Installation Procedure 26 J JUMPLOOP Types 40 Rules to Follow 41 K Keyboard Area 13 Fig 7 L Line Filtering Configuration 24 LINKing Files 18 M Master Step Chart 62 Chart 1 Microprocessor Are In a Way Like Trout 22 Model Number 70 Modes Overview 11 N Nested Loop 41 Noise Suppression Device Ratings 24 Table 7 O Open the 922 How to 9 Fig 2 Output BB Wiring Dual SS Relay 32 Fig 22 Output CC Wiring SS Switch 32 Fig 23 Output FB Wiring 4 20mA SS Relay 32 Fig 24 Overview of the 922 Operating Modes 11 Fig 4 P Packing List 8 Power Wiring 28 Fig 16 Preventing Noise Installation Guidelines 23 Process Calibration 75 Process Variable Unit 4 20mA SS Relay 31 Fig 24 PROGRAM 57 Q Quick Reference 89 WATLOW Series 922 User s Manual 83 Index R Read Me First 7 Reference Compensator to Series 922 Connection Diagram 71 Fig 40 Returns 85 RTD Parameter Settings 74 Table 11 RTD Sensor Wiring Dual 29 Fig 17 RTD Process 30 Fig 18 Running Your Series 922 20 Fig 8 S Sample Program Chapter 3 14 Sensor Installation 21 29 Wiring 29 Series 922 Input and Output Overview 7 Fig 1 SETUP 45 Shipping Claims 86 Specifications 68 SS Relay Output Wiring 31 Fig 22 SS Switch Output Wiring 31 Fig 23 Steps To Put Your Control To Work 8 SYSTEM 42 System Wiring Example 35 Fig 29 T Table of Contents 3 Thermocou
79. ings Prior to programming and operating the Series 922 you must set the DIP Switches DIP Switch 1 sets a warm or cold start following power removal from the 922 With the DIP switch in the OFF position fora Warm Start the microprocessor uses previously programmed information as if power had not been removed A Cold Start starts clean or completely cleared of all user programmed information when the DIP switch is in the ON position All parameters are empty or set to the default limits DIP Switch 2 in the ON position displays only certain factory selected SPCLFUNC parameters Set the DIP Switch in the OFF position to display all parameters DIP Switch 3 selects tenths of units displayed for process inputs DIP Switch 4 is ON for 0 5VDC 0 20mA input amp OFF for 1 5VDC 4 20mA input DIP Switch 5 is not used Set it to the OFF position DIP Switch 6 is for factory test and calibration it must be OFF External Event Input The event input allows the Series 922 to be programmed to wait at that point in the profile until a change in status of the event input occurs It can be pro grammed to wait for a switch closure or opening at Terminals 22 and 24 via the WE wait for event step in the WAITFOR menu Remote Hold Input A contact closure across the remote hold input terminals 22 amp 24 causes the Series 922 to pause until the switch opens This is indicated by a flashing RUN LED While in this condition the 922 activ
80. is a 3 F switching differential An Alarm And The State Of The Alarm Relay Simply stated a flashing alarm on the 922 alphanumeric display indicates the state of the alarm relay contacts A flashing alarm means that when an alarm condition is present ACTUAL beyond an alarm limit then the alarm relay is de energized How To Use The Alarms Chapter 7 WATLOW Series 922 User s Manual 67 Specifications Appendix Control Mode Microprocessor based user selectable modes Dual inputs dual control outputs per channel 8 event outputs 1 event input 1 remote hold input 99 step programmer with up to 10 profiles Control outputs User selectable as Heat Cool Cool Heat e Outputs independent or related via deadband for Heat Cool e ON OFF 3 F or 1 7 C switching hysteresis or 0 3 F or 0 17 C for 0 1 Units e PID parameters per channel Proportional band 0 to 500 C or 0 to 50 0 C for 0 1 Units Reset 0 00 to 5 00 repeats per minute Rate 0 00 to 5 00 minutes Rate band 0 to 7 times proportional band Cycle time 1 to 60 seconds e Deadband 36 F 20 C or Units 2 0 C for 0 1 Units Auxiliary outputs User selectable as e Events 1 amp 2 selectable as alarms for Channels 1 amp 2 e Process or deviation value per output Alarms latching or non latching When non latching control will have 3 F 1 7 C switching hysteresis or 0 3 F 0 17 C for 0 1 Units e Separate high and low values per output Opera
81. meter under the SYSTEM mode Press ENTER If the error persists refer to the Error Code list at the end of the manual to clear Range 0 40 Alarms 1 and 2 are considered nonfatal If you are in the RUN mode your program will continue to run ALMX XX appears and flashes alternately with the parameter you are presently on ENTER the CLR ALARM parameter to clear a latching alarm A non latching alarm clears itself once it falls within the alarm limits Range 1 High 1 Low 2 High 2 Low From any RETURN you can go back to SYSTEM prompt 44 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 SETUP Menu CC Sera While in the HOLD mode press the MODE key until you see SETUP press ENTER These parameters are to setup the personality of your _ Series 922 Using the MODE to progress through the prompts use the UP DOWN keys to select parameters and values and press ENTER Select each ACCESS number Follow that parameter sequence to enter values You must return to SYSTEM before you can continue to the next ACCESS number Graphics Key NOTE Shaded parameters may not Figure 32 MODE Key appear on your SETUP Key Flow ENTER Key control These parameters are UP DOWN Key dependent on how your control is configured See Pages 46 56 for At the SYSTEM prompt press W to continue to SETUP m information Press to enter the SETUP menu ACCESS 3 NOTE C ACCESS 0 CALIB
82. meter Settings Chart Page Item 62 Master Step Chart 6 WATLOW Series 922 User s Manual Table Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Chart Chart 1 Contents Chapter 1 Starting out with the Watlow Series 922 A 2 Channel Ramping Control Dual PID or ON OFF Dual Inputs Outputs Channel RTD T C or Process Value Event Input Remote Hold Input 8 Auxiliary Outputs RS 422A or RS 423A RS 232C Compatible Optional Computer Interface or 2 Auxiliary Outputs Read Me First Figure 1 ee Series 922 Input and Output Overview Congratulations you re about to become a fully qualified user of the Watlow Series 922 This versatile microprocessor based ramping control is powerful yet simple to learn A ramp progresses from one set point to another set point over a period of time In this chapter of the user s manual you ll get an overview of the 922 and its operation Figure 1 is a simplified view of the Series 922 s capabilities It is a 2 channel dual output per channel microprocessor based 1 4 DIN sized ramping temperature control The 922 accepts dual inputs one per channel This includes Type J K or T thermocouple a 1 or 0 1 RTD input or one of two process inputs You can order an external event output board with two or eight auxiliary outputs It has a full control temperature range offset calibration an
83. n response to the difference between set point and process variable Action in response to difference between set point and process variable Condition whereby temperature exceeds set point due to initial power up or process changes A proportional temperature band for Channel 1 or Channel 2 expressed in degrees within which a temperature controller proportioning function is active for cooling expressed in degrees A proportional temperature band for Channel 1 or Channel 2 expressed in degrees within which a temperature controller proportioning function is active for heating Expressed in degrees Proportioning control A physical property whose value determines the response of an electronic control to given inputs Proportioning control with rate action Proportioning control with auto reset When ACCESS 1 is entered in the Series 922 the PID parameters will appear These parameters consist of Propor tional Integral auto reset and Derivative rate actions Proportioning control with auto reset and rate Thermal system element to be regulated such as time temperature relative humidity etc Displayed information which gives the operator programmer the programmed or intended process information i e intended set point intended alarm limit etc See Actual displayed data The span of temperature about the set point where time proportional control action takes place See Time proportioning control Rep
84. nstallation Guidelines Locate the thermocouples in your process or system where they read average temperatures Air flow past these sensors should be moderate The sensors must be thermally insulated from the sensor mounting Both thermocouples must be ungrounded to obtain correct readings Event Input and Remote Hold Input These inputs accept a switch closure to digital common shown on Page 27 22 WATLOW Series 922 User s Manual How to Install and Wire Chapter 4 Definitions Wiring Guide Ground Loop A condition created when two or more paths for electricity are created in a ground line or when one or more paths are created in a shield Earth Ground The starting point for safety and computer grounds It is usually a copper rod driven into the earth Safety Ground A ground line run with electrical power wiring to protect personnel Computer Ground A ground line for the ground connections to computers or microprocessor based systems This line is isolated from safety ground Common Mode Line Filter A device to filter noise signals present on both power line legs with respect to ground Differential Mode Line Filter A device to filter noise signals present between the two power lines themselves The Dos and Don ts of Clean Input Power Do keep line filters as close to the control as possible to minimize the area for interference pick up Do use twisted pair wire and possibly shielded wire from line filters to the c
85. nt Figure 17 Input Option 1 Dual RTD Wiring Diagram NOTE For a two wire RTD Channel 2 Use Terminals 3 and 4 for RTD and jumper Terminal 5 to Terminal 4 Channel 1 Use Terminals 6 and 7 for RTD and jumper Terminal 8 to Terminal 7 WATLOW Series 922 User s Manual 29 Wire Input Figure 18 Input Options 2 amp 7 RTD Process Wiring Diagram NOTE For a two wire RTD Channel 1 Use Terminals 6 and 7 for RTD and jumper Terminal 8 to Terminal 7 NOTE Jumper terminal 4 to 5 only when using 4 20mA input Input Impedance 4 20mA 250 0 5V 100K Figure 19 Input Option 3 A or B T C and Process Wiring Diagram Input Options 2 amp 7 Terminals 1 8 Model 922A 2 _0 _ 000 amp Model 922A 7 _ _ 0 _ 000 Retransmit Common Recorder FW Retransmit Output Optional iH Process 0 5V 4 20mA input Channel 2 Process 0 5V 4 20mA input Channel 1 RTD Input Option 3 Terminals 1 8 Model 922A 3_ _ 0 _ 000 Model 922A A_ _ 0 _ 000 Model 922A B_ _ 0 _ 000 Retransmit Common 1 Chart F Retransmit Output Recorder k Optional Channel 2 Channel 1 oOo N O oO A O NN 30 WATLOW Series 922 User s Manual How to Install and Wire Chapter 4 Input Option 4 Terminals 1 8 Model 922A 4 _0 _ 000 E Retransmit Common Chart Recorder f W Retransmit Output Optional
86. nt outputs solid state relay Form A 0 5A without RC contact suppression 70 WATLOW Series 922 User s Manual Appendix T C Calibration Thermocouple Field Calibration Procedure Equipment Required e Type J K or T depending on model number Reference Compensator with reference junction at 0 C 32 F AND e Precision Millivolt Source OR e Type J K or T thermocouple calibrator e 4 1 2 digit Digital Voltmeter DVM Can be used with either configuration above Setup and Calibration k NOTE Before calibration on an installed control make sure all data and parameters are documented 1 Connect the input side of the thermocouple reference compensator to 6 Positive and 8 Negative for Channel 1 3 Positive and 5 Negative for Channel 2 on the Series 922 terminal strip Short the output side of the compensator and turn on the compensator See Figure 38 If a t c calibrator is used connect to terminal 6 positive and 8 negative series 922 Series 922 for Channel 1 3 positive and 5 negative for Channel 2 inthe 922 Terminal Strip Terminal Strip terminal strip Set the calibrator for the appropriate thermocouple Channel 1 Channel 2 Also set either 0 C or 32 F Lon A Omega Model Copperulies MGJ J or T C Wires Reference Compen MCJ K or sator to Series 922 MCJ T Connection Diagram 2 Connect AC line voltage L1 to 17 L2 to 20 ground to 21 Jumper for correct line voltage See Chapter 4
87. nu under Access 5 DIP switch 4 must be set to the ON position The humidity and dehumidify outputs Outputs 3 amp 4 are disabled when the Channel 1 temperature falls below 40 F 40 C or goes above 320 F 160 C The RH display NOTE The dry bulb will read OFF and the retransmit output is O volts if ANLG C2 ANLG is and wet bulb sensor located in the Setup menu under Access 5 should be mounted in the same location However do not Temp Temp locate the wet bulb For Temp Temp RTD operation each dry bulb RTD or thermocouple senses ahead of the dry f bulb in the air temperature for its channel stream this could cause incorrect relative humidity RTDs readings The RTDs for the Series 922 are customer supplied items They may be Gordon Part S001 0133 0000 which is a wire wound RTD inside a sealed 18 Nickel Silver sheath made for fast temperature response The detector element is platinum wire 100Q at 0 C with a temperature coefficient of 0 0039169 9 C The sheath is 0 1875 in 4 7625mm diameter 2 75 in 69 85mm long The three wire leads are 48 in 1219 2mm long and teflon insulated How to Install and Wire Chapter 4 WATLOW Series 922 User s Manual 21 Install Wire Contact Gordon at 5710 Kenosha St Box 500 Richmond IL 60071 Phone 815 678 2211 Excessive lead length in a two wire RTD sensor can create indication errors To combat this use a three wire sensor in long lead applications R
88. odes and their functions go ahead to learn the keys and displays Series 922 Three Mode Types Control Outputs SYSTEM Manually Enter Program Steps amp View Program PROGRAM Set Up Your System Where To Go From Here Figure 4 Overview of the Series 922 Operating Modes SYSTEM Mode Generates a non ramping set point for Channel 1 and 2 fixed and can manipulate events clear alarms and error codes PROGRAM Mode Enter or view step type program loops wait for conditions set points auxiliary event outputs ON OFF and step duration SETUP Mode Set up or change operating param eters such as real time high low range alarm types alarm points PID settings RS 422 address You are now ready to continue to How to Use the Keys and Displays Chapter 2 Starting Out Chapter 1 WATLOW Series 922 User s Manual 11 Keys Displays Chapter 2 How to Use the Keys and Displays This chapter will show you the Series 922 front panel and the function of each display key and LED Figures 6 and 7 explain the 922 front panel Front Panel Information Use Figures 6 and 7 to assist you in learning the locations and functions of the front panel components Use the following figures to learn the nature and function of the Series 922 s keys and displays Figure 5 Series 922 Front WATLOW Panel Information Figure 6 CTU Where To Go From Here Once you have s
89. ol the temperature change necessary to change the output from full ON to full OFF Process variable information being supplied to the instrument Control action that automatically eliminates offset or droop between set point and actual process temperature Also reset Electrical separation of sensor from high voltage circuitry Allows for application of grounded or ungrounded sensing element The Jump Count parameter represents the number of times that the Series 922 will jump to a specified step The Jump Step parameter of the Series 922 will jump to any step within your current file You cannot Jump Step to another step in another file One of six step types under the PROGRAM menu of the Series 922 that can be programmed as a step or a file You can jump from one step to another within a file Latches your alarm outputs when the Series 922 has an alarm condition Remains active until you manually clear any alarms One of six step types under the PROGRAM menu of the Series 922 that allows you to link one file to another Allows for specific groups of parameters to be unaffected by the Up DOWN and ENTER keys preventing these parameters from being changed accidentally 0 No lock full access of all parameters 1 Prevents user from editing all parameters except the SYSTEM parameter group FILE and STEP 2 Prevents user from editing all parameters except ER1 ER2 ALRM in the SYSTEM menu the LOCK parameter the STEP and
90. on that is important for protecting you others and equipment from damage Pay very close attention to all warnings that apply to your application The symbol exclamation point in a triangle precedes a general CAUTION or WARNING statement The symbol a lighting bolt with an arrowhead in a triangle precedes an electric shock hazard CAUTION or WARNING safety statement Comments and Suggestions Your comments or suggestions on this manual are welcome please send them to Technical Writer Watlow Controls 1241 Bundy Blvd P O Box 5580 Winona MN 55987 5580 or phone 507 454 5300 The Watlow Series 922 User s Manual and integral software are copyrighted by Watlow Winona Inc 1988 with all rights reserved Table of Contents Page Item Starting out with the Watlow Series 922 Chapter 1 Starting Out Read Me First Packing List Put Your Control to Work Three Steps How to Open the 922 How to Set the DIP Switches Changing the Position of a DIP Switch Overview of the Three Operating Modes NN O 12 How to Use the Keys and Displays Chapter 2 Front Panel 12 Front Panel Information 13 Actual and Alphanumeric Display Area 13 Keyboard Area 14 Learning the Series 922 Chapter 3 Sample Program 14 A Brief Overview 15 Enter Real Time 15 Before Entering Your Program 16 Programming File 1 17 Running Your Program 17 Editing Your Program 18 Adding an AUTOSTART Step Type 18 LINKing Files 19 Th
91. ontrol keep the line clean Do keep low power control wires physically separated as far as possible from line voltage wires Also keep all controller wiring separate from other nearby wiring Physical separation is extremely effective A 12 inch minimum separation is usually effective Do use common mode differential mode or a combination of the two filters wherever power may have electrical interferences Do cross other wiring at 90 angles whenever crossing lines is unavoidable Do have a computer ground line that is separate from all other ground lines This computer ground line should ideally terminate at the ground rod where the electrical service is grounded Don t connect computer ground to safety ground or any other ground points in the electrical system except at the ground rod Don t mount relays or switching devices close to a microprocessor control Don t run wires carrying line voltage with signal wires sensor communications or other low power lines going to the control Don t use conduit for computer ground Don t have phase angle fired devices in the same electrical enclosure or on the same power line with the control Don t connect ground to the control case if the control is mounted in a grounded enclosure prevent ground loops Don t fasten common mode line filters or filters with metal cases to metal that is at ground potential This prevents ground loops and maintains filter effectiveness How to Ins
92. ounting information including the location of mount ing brackets and size of the front panel cutout see Figures 13 through 15 Your panel s thickness can be from 0 06 1 5mm to 0 25 in 6 3mm Installation Procedure Follow this procedure to mount the Watlow Series 922 Temperature Control 1 Make a panel cutout per the dimensions in Figure 15 2 Remove the 922 from its case by turning the front panel screw 90 counter clockwise CCW Grip the bezel firmly and pull the control chassis out of the case 3 Place the case in the cutout you just made 4 Attach the mounting brackets either to the top and bottom or to both sides of the unit 5 Tighten the mounting brackets securely against your panel 6 Insert the control chassis into its case and press the bezel to seat it Turn the front panel screw 90 clockwise CW to lock the control in place The hardware installation is complete Go on to the wiring section from here 3 81 Sa H 96 77mm 3 81 Sq 96 77mm Tap aaa n MODE A h d ENTER r a4 a4 a4 A H LD SERIES 922 a 26 WATLOW Series 922 User s Manual How to Install and Wire Chapter 4 DB9 78 Install Wire _ 197 mm _____ Communications Connector f e 3 0 3 56 0 015 90 mm vemm 0 381 a Mounting Bracket Lt lt 3 Event Output Ribbon Connector Alarm Event Terminal Strip 1 3 33 mm ae 0 36 9 mm
93. parameters or programmed instructions which are perma nently stored in microprocessor software to provide a data base A Dual In line Package switch Deutsche Industrial Norms a widely recognized German standard for engineering units In a digital indicating instrument the entire span that can be indicated if fully utilized The difference in temperature between set point and stabilized process temperature Percentage of load ON time relative to total cycle time ER1 Error 1 is considered a fatal error your system will shut down When the Series 922 shuts down all events will be turned off and your program will stop running When an error occurs ER1 00XX will alternately flash with the SYSTEM mode and ENTER the ER1 parameter This will clear your error unless it is a re occuring error and has not been resolved ER2 Error 2 is considered nonfatal If you are in the RUN mode your program will continue running unless it is a program error ER2 00XX appears and will flash alternately along with the parameter that you are presently on Clear an ER2 param eter under the SYSTEM mode If the error persists refer to the Error Code list on Page 90 to clear An event is an ON OFF auxiliary output relay signal You can use events based on time temperature or other process variables to trigger peripheral equipment or process These auxiliary outputs can be alarms or events EV1 and EV2 only appear when AUX1 and AUX2 EV
94. ple Calibration 71 Thermocouple Sensor Wiring TC Process 30 Fig 19 Dual TC 31 Fig 21 Tuning 37 Reference 36 U V Vaisala sensor 21 Ww WAITFOR Step 19 Warranty 85 Watlow Controls 86 Where To Go From Here 11 12 20 Wiring Example 35 Fig 29 84 WATLOW Series 922 User s Manual Appendix Warranty Information The Watlow Series 922 is warranted to be free of defects in material and workmanship for 36 months after delivery to the first purchaser for use provid ing that the units have not been misapplied Since Watlow has no control over their use and sometimes misuse we cannot guarantee against failure Watlow s obligations hereunder at Watlow s option are limited to replacement repair or refund of purchase price any parts which upon examination prove to be defective within the warranty period specified This warranty does not apply to damage resulting from transportation alter ation misuse or abuse Returning Merchandise The following procedure applies for any products returned to the factory 1 You must call Watlow Customer Service 507 454 5300 for a Return Material Authorization RMA number before returning any item for repair We need this information e Ship to address e Bill to address e Contact name e Phone number e Ship via e Your P O number e Symptoms and or special instructions e Name and phone number of person returning the material We will not accept a return without an RMA numbe
95. r The RMA number must appear on the outside of the carton and on all paperwork Cartons without RMA numbers will be returned Ship on a freight prepaid basis 2 You need prior approval and an RMA number from the Customer Service Department when you are returning an unused product for credit Also we must apply a 20 percent restocking charge for all returned stock controls and accessories 3 After we receive your return we will enter a repair order replacement order or issue credit for material 4 In cases of manufacturing defect we will return it to you with a letter of explanation Repair costs will not exceed 50 percent of the original cost Appendix WATLOW Series 922 User s Manual 85 Shipping Shipping Claims When you receive your Watlow control examine the package for any signs of external damage it may have sustained enroute If there is apparent damage either outside the box or to its contents make a claim with the shipper immediately Save the original shipping carton and the packing material Watlow Controls Watlow Controls is a division of Watlow Electric Manufacturing Company of St Louis Missouri Watlow is an established manufacturer of industrial electric heating products in business since 1922 Watlow boasts the ability to begin with a full set of specifications and to complete an industrial product that is manufactured totally in house in the U S A Products designed and manufactured by Watlow are electric
96. r if your Series 922 does not have communications Represents the device identification number as required for the ANSI X3 28 communications protocol for the Series 922 The Cooling Cycle Time for Channel 1 or Channel 2 usually expressed in seconds for a controller to complete one ON OFF cycle The time between successive turn ons The Heating Cycle Time for Channel 1 or Channel 2 usually expressed in seconds for a controller to complete one ON OFF cycle Time between successive turn ons The time necessary to complete a full ON through OFF period in a time proportioning control system Represents the number of days that the 922 will wait until AUTOSTART takes place Each time 00 00 is achieved one day has gone by The Dead Band parameter for Channel 1 or Channel 2 represent ing the area where no heating or cooling takes place in a heat cool proportional control A temperature band between heating and cooling functions Anticipatory action that senses the rate of change of temperature and compensates to minimize overshoot and undershoot Also Rate The difference between the value of the controlled variable and the value at which it is being controlled WATLOW Series 922 User s Manual 77 Glossary DE ag Defaut parameters 78 DIP Switch DIN Display capability Droop Duty cycle ER1 ER2 Events EV1 amp EV2 EV3 EV8 FILE GS HOUR WATLOW Series 922 User s Manual The
97. r tells you how to install the Series 922 All mounting and wiring information is right here Because Watlow controls are thoroughly tested and burned in before leaving the factory the Series 922 is ready to install when you receive it But before you begin working or cutting holes in panels read through this chapter to gain an understanding of the entire installation Consider sensor installation carefully You ll need to look at the noise reduction guidelines before making your panel cutout Miscellaneous Sensor Information Temp RH Wet Bulb Dry Bulb In this 922 configuration a dry bulb RTD measures tem perature on Channel 1 A wet bulb RTD in combination with the dry bulb RTD senses relative humidity on Channel 2 The 922 calculates the temperature difference between the two bulbs to determine per cent relative humidity The humidity dehumidify outputs Outputs 3 amp 4 are disabled when the Channel 1 temperature falls below 32 F 0 C or goes above 212 F 160 C The RH display reads OFF and the retransmit output is O volts if ANLG C2 ANLG is located in the Setup menu under Access 5 Solid State RH Sensor Vaisala Model HMM 30C Relative Humidity Sensor With the Vaisala configu ration Channel 1 must be configured to measure temperature and Channel 2 must be a process input configured for humidity with the Vaisala sensor See below for the TYP parameter description This parameter is located in the Setup me
98. rammed Value the system compares against the process variable of Channel 2 and waits for before proceeding to the next step of the program This parameter will not appear if T or P Channel 1 only in the TYP parameter under the SPCLFUNC menu have been selected Range R2L to R2H Default Unprogrammed The hours the system will wait for relative to when the step began This is not a measure of time of day Range 0 to 23 hours Default Unprogrammed Represents the minutes the system will wait for relative to when the step began This is not a measure of time of day Range 0 to 59 minutes Default Unprogrammed How To Program the Series 922 Chapter 6 PROGRAM Menu WE A wait for event input represented by a switch closure or opening at which the 922 continues the program This is not a voltage or current input Range OPEN or CLSE Default Unprogrammed RETURN From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to FILE by pressing MODE One of six step types under the PROGRAM menu of the Series 922 that can be programmed to automatically start at a determined real time The AUTOSTART function is dependent on the three parameter settings below DAY HOUR and MIN If there is a loss of power to the Series 922 the real time clock is also lost and any programs dependent on time is incorrect AUTOSTART Represents the number of days that the 922 waits until AUTOSTART takes place Each
99. resents a high limit to set point for Channel 1 or Channel 2 The default values are also the high limits of your input type Represents a low limit to set point for Channel 1 or Channel 2 The default values are also the low limits of your input type Anticipatory action that senses the rate of change of tempera ture and compensates to minimize overshoot Also deriva tive A thermal control band that defines where the rate derivative function begins A Watlow rate band occurs centered on set point at one or more times the width of the proportional band The thermal control band for cooling in Channel 1 or Channel 2 that defines where the rate derivative function begins Appendix RB1H RB2H RS1C RS2C RS1H RS2H RT1C RT2C RT1H RT2H Reference junction Reset Reset windup inhibit RETURN RTD SE1 SE2 SEC Set point SETPOINT SP1 SP2 SPCLFUNC STEP STOP Appendix A thermal control band for heating in Channel 1 or Channel 2 that defines where the rate derivative function begins Glossary R 2 S Reset integral cooling control action for Channel 1 or Channel 2 that automatically eliminates offset or droop between set point and actual process temperature in a proportional control Expressed in repeats per minute A reset integral heating control action for Channel 1 or Channel 2 that automatically eliminates offset or droop between set point and actual process tempera
100. respectively and when the two or eight output external event board is connected You can change the state of the events only in the HOLD mode Auxiliary outputs can be alarms or events These auxiliary outputs are events EV3 through EV8 only appear when the eight output external event board is connected Represents the current SYSTEM file of the Series 922 to be edited or reviewed Under the LINK parameter FILE stands for the file that you want to link to The Guaranteed Soak parameter guarantees that the actual temperature of Channel 1 is being controlled within a window around set point If exceeded the step time clock will stop until the actual temperature is within the soak window The HOUR parameter has three meanings depending upon which menu you are in PROGRAM menu The number of hours in combination with the MIN and SEC parameters that equal the total step time to achieve the temperature Under the AUTOSTART step type the hours that the 922 will wait for the time of day clock before AUTOSTART takes place SETUP menu Represents the SYSTEM 24 hour time of day clock Midnight 0 hours Appendix Hunting Hysterisis Input Integral Isolation JC JS JUMPLOOP LAT LINK LOCK MIN Offset ON OFF control Open loop Operating band Appendix Oscillation or fluctuation of process temperature between set point and process variable Glossary H O In ON OFF contr
101. rm Fixed Degree digance from SP1 Temp es a hn New SP1 SP1 EEEO E T EENT E EET Actual 0 C 64 WATLOW Series 922 User s Manual How To Use The Alarms Chapter 7 Alarms The Operating Band Now we need to set the alarm limits In doing so you ll define an operating band where you want system temperature or your controlled variable to be OK and alarm free By selecting an alarm type ALTYP and then the alarm limits AXL AXH you define the Operating Band The extreme limits of the Operating Band are defined by the 922 s high and low ranges RXL and RXH Alarm Limits You can set up alarm bands with the two available alarms Each of the two alarms has a high and a low limit point indicated by the L or H designation You specify in the Operating Data where you want A1L A1H A2L and A2H These limit points are themselves restricted by the controller s high and low range Operating Parameters RXH and RXL In other words you can t set an alarm limit beyond the range limits you enter into the microprocessor Figure 36 Alarm Limits for Alarms 1 and 2 with Process Type Alarm ALTYP1 P ALTYP2 P Temp SP piar LEY NOTE Only Chan Actual F nel 1 is shown here 0 C Time How To Use The Alarms Chapter 7 WATLOW Series 922 User s Manual 65 Alarms Figure 37 Alarm Limits for Alarms 1 and 2 with Deviation Type Alarm ALTYP D ALTYP D NOTE Only Chan nel 1 is shown
102. rrected is increasing Expressed in minutes This parameter will not appear if PB1C is set to 0 Range 0 00 to 5 00 minutes RTIC Default 0 00 CTIC The cooling cycle time for Channel 1 expressed in seconds for a controller to complete one ON OFF cycle Time between successive turn ons This parameter will not appear if Your Series 922 has a 4 20mA output and OUT1 under the SPCLFUNC menu is set to CLHT or PB1C is set to 0 Range 1 to 60 seconds Default 5 RBIC A thermal control band for Channel 1 cooling that defines where the rate derivative function begins This band is in multiples of the cool proportional band This parameter will not appear if PB1C is set to 0 Range 0 to 7 times the PB1C 0 denotes rate is always functional Default 0 RETURN From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to PID by pressing the MODE key Under the PID menu Channel 2 can be selected These parameters consist of Proportional Integral auto reset and Derivative rate CH2 actions If T Temperature for Channel1 only or P Process for Channel 1 only have been entered in the TYP parameter under the SPCLFUNC menu Channel 2 will not appear Range CH1 CH2 Default CH1 A proportional temperature band expressed in degrees within which a temperature controller proportioning function is active for Channel 2 heating Expressed in degrees This parameter will not appear if T or
103. s When ACCESS 5 is selected under the SETUP mode of the Series 922 the Special Function SPCLFUNC parameters appear Here you can select the degrees output type auxiliary and alarm types among others Accepts the sensor input and scales it to degrees Celsius Fahrenheit or Units of measure depending on the input type selected and the C F U selection made This prompt will not appear if DIP switch 2 is ON Changing this parameter defaults parameters SP1 A1L A1H and clears all files Range C F or U Default F How To Program the Series 922 Chapter 6 op m 4 Cc 5 lt e gt RB2C RETURN ACCESS 3 DIAGNOS MANI MAN2 C2 RH RETURN ACCESS 5 SPCLFUNC C F U WATLOW Series 922 User s Manual 53 SETUP Menu TYP OUT1 OUT2 RiL R1H R2L R2H 54 WATLOW Series 922 User s Manual C a eee Allows the operator to configure the unit to the type of actual process display to be shown This also affects the number of channels This parameter will not appear if DIP Switch 2 is ON Changing this parameter defaults all parameters and clears all files Range Dependent on input board type as follows T Temperature H Humidity P Process V Vaisala RH sensor HMM 30C Dual T C TT T Dual RTD TT TH T Dual RTD 0 1 TT TH T 0 1 RTD Process TP TV T T C Process TP TV T RTD Process TP TV T Dual Process PP PV P
104. s on the display press the enter key to stop the flashing for 5 minutes To clear the alarm or error go to the system menu and press enter on the appropriate prompt Appendix ER2 Error Codes and Actions 1 2 20 21 22 23 24 25 26 27 28 30 31 32 33 35 36 37 39 40 922 transmit buffer overflow Clear error retransmit 922 receiver buffer overflow Pro tocol or syntax violation retransmit Framing overrun error Check baud rate parity stop bits Parity error Check baud rate parity stop bits Talking out of turn STX protocol violation retransmit Invalid reply error Figure out com munications retransmit Command not found Check your program Parameter not found Check your program Incomplete command line Syntax error retransmit Invalid character Syntax error retransmit Number of characters overflow Numeric syntax error retransmit Input out of limit Transmitted value too large or small retransmit Read only command Cannot input a value for that parameter retransmit No Channel 2 available error Write only error A read was attempted on a parameter that can only be written to Request to run invalid Verify a run condition Request to hold invalid Verify a hold condition Command invalid in run mode Cannot enter values in run mode retransmit Self test mode not active Check to see that DIP switch 6 is ON Number of steps stor
105. sensing device that is constructed of two dissimi lar metals wherein a measurable predictable voltage is generated corresponding to temperature Fail safe operation that assures output shutdown upon an open thermocouple condition Proportioning control with reset and rate Represents the Real Time hours and minutes of the Series 922 s system Action which varies the amount of ON and OFF time when close to the set point i e in the proportional band This variance is proportional to the difference between the set point and the actual process temperature In other words the amount of time the output relay is energized depends on the system temperature Solid state switching device One of six step types under the PROGRAM menu of the Series 922 that can be programmed to wait for a specific amount of time or a process value Start up condition where all program information is remem bered by the instrument s memory backup protection Represents the state that the Series 922 will wait for in the program for the remote event input to be present The hour that the system will wait for relative to when the step began This is not a measure of time of day Represents the minutes that the system will wait for relative to when the step began This is not a measure of time of day Temperature that the system will compare against the process variable of Channel 1 or Channel 2 and wait for before proceeding to the next step
106. shooting or approaching the set point too slowly Calibration Offset Adjustment You may want your system to control to a temperature other than the value coming from the input sensor If so measure the difference as much as 90 F or 50 C between that tem perature perhaps at another point in the system and the process value showing in the alphanumeric display Then enter the amount of CAL offset you want Calibration offset adds or subtracts degrees from the value of the input signal After you have tuned your Series 922 continue to Chapter 6 to learn how to Program your Series 922 for your system How To Tune and Run the Series 922 Chapter 5 WATLOW Series 922 User s Manual 37 a How To Program The Series 922 This chapter enables you to setup the Series 922 quickly and easily It explains why it s a good idea to write out your parameter values Chapter 6 also shows you flow diagrams of the programming process Write Out Your Program The Watlow Series 922 controls temperature for a specific heating and or cooling process Your setup parameter values when they re entered give the Series 922 orders for the work you want it to perform Since the amount of information in the setup is extensive we suggest that you write the value on a copy of the Master Step Chart on Page 62 This enables you to program the Series 922 quickly and without mistakes The chart makes a good record of your values Select the Proper DIP Switch Sett
107. still exists Refer to the Series 922 manual ER1 error codes can only be cleared when in the SYSTEM prompt and ER1 XX is flashing ER2 error codes can be cleared by returning to the SYSTEM menu or by pressing the ENTER key while in the RUN mode How to Clear an Alarm Code An alarm code will alternately flash with the parameter that you are presently on If the LAT alarm value is NLAT your alarms are non latching and will clear automatically when the ACTUAL display value returns to within the normal operating band If LAT LAT the alarms are latching and must be cleared Alarm conditions can be cleared by pressing the ENTER key while in the RUN mode or in the CLR ALARM parameter a FLE y START RESUME L RETURN BE To SYSTEM Menu FILE G _ i a JUMPLOOP RUN Menu One of the three step types will be displayed depending on the type of step PROGRAMmed STOP and LINK step types are immediate and will not be visible x WAITFOR AUTOSTART DAY HOUR MIN 00 00 00 00 00 00 Pi 88 WATLOW Series 922 User s Manual Appendix Series 922 Quick Reference Main Menu SYSTEM To SYSTEM Menu PROGRAM To PROGRAM Menu SETUP To SETUP Menu aa gf Xs SYSTEM Menu SYSTEM SP1 EV8 El ERI ER2 CLR ALA
108. tall and Wire Chapter 4 WATLOW Series 922 User s Manual 23 Wiring Guide How to Check for Ground Loops To check for ground loops disconnect the ground wire at the ground termina tion Measure the resistance from the wire to the point where it was connected The ohmmeter should read a high ohm value If you have a low ohm value across this gap there is at least one ground loop present in your system Also check for continuity your reading should be open If you do find conti nuity you must now begin looking for the ground loops Begin disconnecting grounds in the system one at a time checking for continuity after each discon nection When continuity reads open you have eliminated the ground loop s Also as you reconnect grounds keep making the continuity test It is possible to reconnect a ground loop How To Eliminate Noise Use snubbers QUENCHARC to filter out noise generated by devices such as relays relay contacts solenoids motors etc A snubber is a simple filter device using a 0 1uf 600 volt non polarized capacitor in series with a 100Q 1 2 watt resistor The device can be used on A C or D C circuits to effectively dampen noise at its source The general purpose Watlow snubber described above is 0804 0147 0000 For other QUENCHARC sizes contact PAKTRON P O Box 5439 Lynchburg VA 24502 Phone 804 239 6941 A Metal Oxide Varistor MOV can be used to limit voltage spikes that occur on t
109. ternal plug in module e Solid state relays 2 or 8 ea 0 5A 24VAC min 264 VAC max e Auxiliary supply 21 to 33VDC 25mA maximum e Switched DC signal provides a minimum turn on voltage of 3VDC ina minimum 500Q load Maximum on voltage not greater than 32VDC into an infinite load Output Analog Retransmit e Device driven must have an input impedance gt 10kQ e Reference 0 Units 0 Volts Scalable 1mV 2mV 5mV or 10mV per LSD e Maximum voltage Span 9 5 to 9 5 volts Accuracy e Calibration Accuracy and Sensor Conformity 0 15 of span 1 digit at 77 F 5 F 25 C 3 C ambient amp rated line voltage 10 e Accuracy Span 1000 F or 540 C minimum e Temperature Stability 0 18 F F 0 1 C C change in ambient e Voltage Stability 0 01 of span of rated line voltage Communications e Serial data communications e RS 422A or RS 423A RS 232C compatible e Most operator indication and controls e ANSI X3 28 protocol or XON XOFF protocol e Isolated DB 9 Female connector Terminals e 6 compression type screw terminals Power e 115 230VAC 10 50 60Hz 5 e 18VA maximum e Data retention upon power failure via nonvolatile memory Operating Environment e 32 to 130 F 0 to 55 C e Oto 90 RH non condensing Dimensions e Height 3 8 in 96 52 mm e Width 3 8 in 96 52 mm e Overall depth 7 0 in 177 80 mm e Behind panel depth 6 0 in 152 50 mm with conne
110. tes 0 00 CT2C Enter the Channel 2 Cycle Time value Cooling Not displayed if PB2C 0 Dependent on output TYP amp OUT2 1 60 seconds 5 RB2C Enter the Channel 2 Rate Band value Cooling Not displayed if PB2C 0 Dependent on TYP parameter 0 denotes rate is always functional 0 7 times PB2C RETURN Prompt ACCESS To enter DIAGNOS parameter use ACCESS 3 and press ENTER Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the PID prompt Description 3 DIAGNOS Range Default MAN1 Enter power output for Channel 1 100 to 100 MAN2 Enter power output for Channel 2 Dependent on TYP parameter 100 to 100 C2 RH Displays Channel 2 ACTUAL temperature humidity R2L to R2H RETURN NOTE Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to the DIAGNOS prompt Positive always refers to the heat output and Negative refers to the cool output How To Program the Series 922 Chapter 6 WATLOW Series 922 User s Manual 47 NOTE Changing these parameter S ET U P M enu values will default other parameters and clear all files See Page 53 amp 54 for details Table 9 continued Make photocopies keep original clean Prompt Description Default Your Settings ACCESS 5 SPCLFUNC To enter SPCLFUNC parameter use ACCESS 5 and press ENTER C F U Enter th
111. the control will try to achieve by the end of the step When in the RUN mode it represents the current set point Its primary function is as the control point of the closed loop When ACCESS 5 is selected under the SETUP mode of the Series 922 the Special Function parameters appear Here you can select the input type degrees output type auxiliary and alarm types among others Represents the current SYSTEM file step of the Series 922 to be edited or reviewed One of six step types under the PROGRAM menu of the Series 922 that will indicate the end of any file WATLOW Series 922 User s Manual 81 Glossary S Z 82 SYSTEM Switching sensitivity Thermal System Thermocouple Thermocouple break protection Three mode control Ti Time proportioning control Triac WAITFOR Warm start WE WHR WMN W1 W2 Zero switching WATLOW Series 922 User s Manual One of three main level operating parameters From the SYSTEM menu you can generate a non ramping set point fixed manipulate Events 1 through 8 clear error codes and latching alarms and monitor Channel 2 s actual temperature and the external input In ON OFF controls the temperature change necessary to change the output form full ON to full OFF 3 or F in the Series 922 A regulated environment consisting of a heat source heat transfer medium sensing device and a process variable control instrument Temperature
112. the baud rate that serial communications will be running at This parameter will not appear if your Series 922 does not have communications Range 1200 2400 4800 9600 Default 1200 Represents the device identification number as required for the ANSI X3 28 communications protocol for the Series 922 This parameter will not appear if COM has been selected as XON or if your Series 922 does not have communications Range 0 to9 Default 0 COMID Allows for specific groups of parameters to be unaffected by the UP DOWN and ENTER keys preventing these parameters from being changed accidentally 0 No lock full access of all parameters 1 Prevents user from editing all parameters except the SYSTEM parameter group the LOCK parameter and the STEP and FILE parameter in the PROGRAM and pre run menus 2 Prevents user from editing all parameters except ER1 ER2 ALRM in the SYSTEM menu the LOCK parameter and the STEP and FILE parameter in the PROGRAM and pre run menus Range 0 to 2 Default 0 LOCK CLR FILE Allows the operator to clear a file of the Series 922 Press ENTER and choose the FILE that you want to clear Range 1 to 10 From RETURN you can go back to the SYSTEM prompt by pressing the ENTER key or return to SPCLFUNC by pressing the MODE key RETURN 56 WATLOW Series 922 User s Manual How To Program the Series 922 Chapter 6 PROGRAM Menu PROGRAM Menu From the Program menu you can create your files
113. tor Interface Membrane front panel Four digit 1 2 LEDs displaying actual process input value LED indication of C F or process variable units MODE ENTER UP DOWN and RUN HOLD keys Eight character alphanumeric display of operating data Input Thermocouple RTD and electrical process input Automatic cold junction compensation for thermocouple RTD input 2 or 3 wire platinum 100 ohm 0 C calibrated to JIS curve 3916 0 003916 Q Q C DIN curve 3850 0 003850 2 Q C Sensor break protection de energizes control outputs to protect system Ungrounded sensors required Operating ranges user selectable J t c 32 to 1382 F or 0 to 750 C K t c 328 to 2282 F or 200 to 1250 C T tc 328 to 662 F or 200 to 350 C 1 RTD 328 to 1112 F or 200 to 600 C 0 1 RTD 99 9 to 392 0 F or 99 9 to 200 0 C 0 5VDC 99 to 1800 units 4 20mA 99 to 1800 units RH 0 5VDC 0O to 100 RH Vaisala sensor Calibration offset or input signal 90 F 50 C 50 PVU s front panel adjustable 9 0 F 5 0 C for 0 1 C Units F C or process variable units are user selectable 68 WATLOW Series 922 User s Manual Appendix Output Control Per Channel Single or Dual a e Solid state relay 0 5A 24VAC min 264 VAC max opto isolated zero Specifications cross switching Solid state switch 20mA 20VDC max open collector switch to ground e 420mA into 600Q load maximum du aatclal cael Auxiliary Ex
114. tudied the keys and displays in this chapter and have a good idea of where everything is on the Series 922 continue to Chapter 3 for the Sample Program If you skip the sample program do not forget to check the position of DIP Switch 1 before you begin programming your control after installation With DIP Switch 1 OFF the 922 saves your program whenever power is removed warm start With DIP Switch 1 ON the 922 will clear its memory of all programmed information whenever power is removed substituting default values cold start 12 WATLOW Series 922 User s Manual How to Use Keys and Displays Chapter 2 Actual and Alphanumeric Display Area Keys Displays F LED Indicates the value in the ACTUAL display is ACTUAL Display Shows the actual value of the process variable for Channel 1 in four digits ae Alphanumeric Display Shows entry prompts the parameter values in alphanumerics and Channel 2 ACTUAL value Keyboard Area DOWN Key Acts opposite the UP key Decreases the value in the alphanu meric display A light touch decreases the value by one digit Hold the key down to de crease the displayed value at a rapid rate RUN HOLD Key Executes or holds program from any Main menu MODE Key This key steps the Series 922 in sequence from prompt to prompt SERIES 922 UP Key A Increases the value in the alphanumeric display A light touch increases the value by one digit Hold t
115. ture in a proportional control Expressed in minutes The Rate derivative Cooling function for Channel 1 or Channel 2 that is determined by how fast the error being corrected is increasing Expressed in minutes The Rate derivative for the Heating function for Channel 1 and Channel 2 that is determined by how fast the error being corrected is increasing Expressed in minutes Synonymous with cold junction See Cold junction Control action that automatically eliminates offset or droop between set point and actual process temperature Also integral Synonymous with anti reset See Anti reset From any RETURN parameter you can go back to SYSTEM Resistance Temperature Detector Resistive sensing device displaying resistance versus temperature characteristics Displays positive temperature coefficient Only appear when in the RUN mode Represents the set endpoint of the current step for Channel 1 or Channel 2 that the Series 922 will try to achieve in the amount of time given This will be done linearly producing a ramp from a beginning set point to an end set point Seen only in the RUN mode The number of seconds that equal total step time to achieve the temperature of the Series 922 Intended value of the process variable One of six step types under the PROGRAM menu of the Series 922 Can be programmed as a file or a step to achieve or maintain a set point When in the PROGRAM menu this is the set point that
116. utput AL AUX2 EV Event output Not displayed if DIP Switch 2 is ON Dependent on TYP amp event board ALTYP1 Enter Alarm Type 1 ALTYP1 P Process alarm ALTYP1 D Deviation alarm Not displayed if DIP Switch 2 is ON Dependent on AUX1 amp event board ALTYP2 Enter Alarm Type 2 ALTYP2 P Process alarm ALTYP2 D Deviation alarm Not displayed if DIP Switch 2 is ON Dependent on AUX2 TYP amp event board LAT Enter the Alarm function type LAT or NLAT Not displayed if DIP Switch 2 is ON RTD Enter input gain of RTD input channels for different curves JIS or DIN Not displayed if DIP Switch 2 is ON Dependent on input ALT Set altitude in feet for humidity mode 0 2500 5000 Not displayed if DIP Switch 2 is ON Dependent on input GS Enter the Guaranteed Soak 0 50 C ANLG Enter parameter the Analog retransmit signal represents C1 C2 SP1 SP2 SCALE Enter millivolts to scale analog retransmit output 1 2 5 10 COM Select between XON XOFF or ANSI X3 28 protocol XON or STX Dependent on communications capability BAUD Select baud rate for serial communications to run at 1200 2400 Dependent on communications capability 4800 9600 COM ID Enter the Communications protocol Identification 0 9 Dependent on communications capability and COM STX LOCK Enter the Front panel Lock code CLR FILE Press ENTER to display FILE Enter a file number to clear RETURN Press the ENTER key to return to the SYSTEM prompt Press the MODE key to return to t
117. uxiliary Output 1 will be a process alarm or a deviation alarm for the Series 922 Present only when AUX2 AL Determines whether the alarm type for Auxiliary Output 2 will be a process alarm or deviation alarm Allows the operator to select which parameter the analog retransmit signal represents For a chart recorder output select C1 or C2 For a remote set point signal to slave controls select SP1 or SP2 C2 and SP2 will not appear if TYP parameter is T or P Control feature that inhibits automatic reset action outside of the proportional band Data entry points where a microprocessor based control prompts or asks the operator programmer for information input One of six step types under the PROGRAM menu of the Series 922 that can be programmed to automatically start at a certain time depending on the DAY HOUR and MIN parameter settings This parameter determines whether Auxiliary Output 1 will be an alarm or event output for the Series 922 This parameter determines whether Auxiliary Output 2 will be an alarm or event output for the Series 922 When AUX1 AL it represents the high process alarm or high deviation alarm for Alarm 1 This parameter represents the low process alarm or low deviation alarm for Alarm 1 of the Series 922 Displayed only when AUX1 AL Represents the high process alarm or high deviation alarm for alarm 2 of the Series 922 Displayed only when AUX2 AL The low process alarm or low devi
118. vent Events may be changed ON or OFF in the HOLD mode EV2 will only appear when AUX2 EV under the SPCLFUNC menu and when the external event output board is connected or when TYP T or P and an external event board is connected Range OFF or ON Default OFF These auxiliary outputs are events Events may be turned ON or OFF in the HOLD mode EV3 through EV8 only appear when the 8 event output external board is connected Range OFF or ON Default OFF El monitors the status of the external event input OPEN will be displayed if the external event input is open or will display CLOSE if terminals 22 and 24 are tied together This is a switch input not voltage or current Range OPEN or CLOSE Default OPEN if nothing is connected to the input ER1 is considered a fatal error your system will shut down When the Series 922 shuts down all outputs will be turned off and the program will stop running When an error occurs ER1 00XX will alternately flash with the SYSTEM parameter To clear an error ENTER the SYSTEM mode and scroll to the ER1 parameter Press ENTER This clears the error unless it is a re occuring error and has not been resolved Some ER1 errors are self clearing Range 0 18 ER2 is considered nonfatal If you are in the RUN mode your program will continue running unless it is a program error ER2 00XX appears and flashes alternately along with the parameter that you are on To clear an ER2 return to the ER2 para
119. w to Wire the Series 922 This section has all the information you need to complete a good wiring job on the Series 922 and your system Please read the Safety Information in the narrow column on the outside of each page You will find internal circuits on the left in the following diagrams and external circuits on the right In addition input and output options are listed by model number Refer to the unit sticker on your control to be sure that you are wiring from the corresponding diagram We suggest that you read through the entire section before beginning your hookup Then proceed starting with the sensor inputs auxiliary outputs then control outputs data communications and finally power wiring It is very important to enter a system set point in the Series 922 before applying power to the load circuitry e In all wiring diagrams internal circuits are on the left and external circuits are on the right Input Option 1 or 6 Terminals 1 8 NOTE Input impedance d Retransmit Common Chart must be 10K or greater 2 ra Retransmit Output Optional 3 4 Channel 2 5 RTD 6 7 Channel 1 8 How to Install and Wire Chapter 4 Wire Input WARNING To avoid electric shock make all connections on the back of this control before connecting power to the control Also disconnect power before opening the Series 922 Do not apply load power to the output circuits until you have entered a system set poi
120. y increase PB until the ACTUAL display temperature stabilizes to a constant value The temperature will not be right on set point because the initial reset value is 0 00 repeats per minute The ACTUAL temperature will stabilize below the desired setpoint When PB 0 RS RT and CT are inoperative and the 922 functions as a simple ON OFF control with a 3 F or 1 7 C switching differential Reset Adjustment Gradually increase RS until the ACTUAL display temperature begins to oscillate or hunt Then slowly decrease RS until the ACTUAL display stabilizes again near set point NOTE This is a slow procedure taking from minutes to hours to obtain optimum value Cycle Time Adjustment Set CT as required Optimum system control is always achieved with faster cycle times However if a mechanical contactor or solenoid is switching power to the load a longer cycle time may be desirable to minimize wear on the mechanical components Experiment until the cycle time is consistent with the quality of control you want Rate Adjustment Increase RT to 0 10 min Then raise SP by 20 to 30 F or 11 to 17 C Observe the system s approach to SP If the load temperature overshoots SP increase RT to 0 20 minutes Then raise SP by 20 to 30 F or 11 to 17 C and watch the approach to the new set point If RT is advanced too far approach to the set point will be very sluggish Repeat as necessary until the system rises to the new set point without over

Watlow Series 922 - Whaley Food Service

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