Delta Electronics Valve Temperature Controller DTV User's Manual
Contents
1. 9 999 Unit 0 1 only applicable in manual control mode 1 scale 2 8uA 1 3mV 1 scale 2 8uA 1 3mV 99 9 99 9 unit 0 1 0 3 0 1 999 9 0 100 unit 0 1 0 1 024 0 1 024 0 4 In valid range Unit 0 1 Lower limit for control output 100 unit 0 1 0 Upper limit for control output unit 0 1 See Alarm Output section See Alarm Output section 0 None default 1 2 Set alarm 1 alarm 2 See Alarm Output section See Alarm Output section See Alarm Output section See Alarm Output section b0 F b1 C b2 ALM2 b3 x b4 OUT1 b5 OUT2 b6 AT b7 ALM1 bO Set b1 Select b2 Up b3 Down 0 refers to push 0 normal 1 lock all 11 SV adjustable 111 SV adjustable A M available V1 00 refers to 0x100 0 7 0 7 N refers to the pattern will be executed from step 0 to step N 0 99 refers to the pattern will be executed for 1 100 times 0 8 8 refers to end of the program 0 7 refers to the next pattern No following the current pattern 999 9 999 0 900 Every scale 1 minute Address and content of the bit register read bits are stored starting from LAB and written data is FFOOH set the Communication write in forbidden 0 default allowed 1 0 F 1 C linear input default 0 or 1 Available for all modes except for thermocouple type B S R 0 AT stops default 1 AT starts 0 stop 1 run defau2. Sa Select control mode Enter step editing when PID programmable control is selected See the next table Press V Select heating or cooling Press V Set up alarm mode 1 Press ye GG Set up alarm mode 2 Press V Set up system alarm Press W Enable disable communication write in Press Vv Select ASCII RTU communication format Press V Set up communication address Press V Set up baud rate Press V Set up data length Press V Set up stop bit Press gt Back to top Select the PID group The user can select one of the 4 groups When n 4 the program will automatically select the PID group that is the closest to the SV Select the PID group n 0 4 Press gt PID group 0 3 Set up the temperature SV for PID group 0 Press Y MA set up the proportion band for PID group 0 Press Avs BETH Set up the Ti value for PID group 0 Press V Set up the Td value for PID group 0 Press Q y Set up the integration offset for PID group 0 AT auto setting Pres gt PD control offset Set up the temperature SV for PID group 3 Press VY Set up the proportion band for PID group 3 Press V Set up the Ti value for PID group 3 Press Q V Set up the Td value for PID group 3 Press Y Set up the integration offset for PID group 3 AT auto setting Press gt PD control offset Editing patterns and steps In parameter ERA select BZH for editing Take pattern 0 for example
3. 2 Lower limit for alarm 2 Read write LED status Read write key status Panel lock status Software version No of start pattern Number of steps in a pattern Additional number of cycles for a pattern No of the link pattern for the current pattern SV temperature for patternO 7 SV for pattern 0 is set in 2000H 2007H Execution time for pattern 0 7 Time for pattern 0 is set in 2080H 2087H bit as 1 OOOOH sets the bit data as 0 0810H 0811H 0812H 0813H 0814H 0815H 0816H 0817H 0818H Selecting communication write in Selecting temperature unit Position of the decimal point Read write auto tuning AT RUN STOP of the control Programmable control RUN STOP Programmable control RUN PAUSE Read write valve feedback Read write AT of valve feedback Explanation Unit 0 1 degree updated every 0 4 second The read values below indicate the occurrence of errors 8002H temperature not acquired yet 8003H temperature sensor not connected 8004H wrong sensor type 8006H unable to acquire temperature ADC input error 8007H unable to read write the memory Unit 0 1 degree The content shall not be bigger than the range The content shall not be smaller than the range See Types of Temperature Sensors and Temperature Range table 0 PID 1 On Off 2 manual control 3 PID programmable control 0 heating 1 cooling 0 1 999 9 0 9 999 0 9 999 0 100 unit 0 1 0 100 unit 0 1 0
4. GEET Select the pattern No to be edited Select No gt Press V Select OFF Leave pattern and step editing V Edit the temperature in step 0 Press Q V t00 Edit the time for step 0 unit hour minute mbt Select the actual number of steps in the program Press V Set up the number of additional cycles 0 99 Press V Set up the link pattern OFF end of program Continue the setup in Eitu Press Wi Set up from step 0 step 7 in order Press eV Eff Edit the temperature in step 7 Return to select the pattern No to be Press V edited EEH Edit the time for step 7 unit hour minute Press Vv Following the actual number of steps E Output Control DTV offers heating and cooling outputs In parameter S HEE you can select either to operate heating control or cooling control Select for heating output and for cooling output Heating hysteresis i Cooling hysteresis Output ON oe Cooling Heatin l g Cooling o m dik A gt PV Set point Set point Figure 1 Output operation when in On Off control Figure 2 PID control Key locked Function Lot Lock all the keys on the panel Only SV can be modified Only SV and auto manual mode can be modified The control mode has to be PID control Press and at the same time to unlock the keys E Types of Temperature Sensors amp Temperature Range Input Sensor Type Register Value Display Range 0 50mV analog inp
5. alarm Alarm will be enabled when the PV reaches SV and exceeds OFF SV AL H A A SV AL H ON 10 Lower limit standby alarm Alarm will be enabled when the PV reaches SV and falls below OFF SV AL L acl S ON 11 Upper limit hysteresis alarm Alarm will be enabled when the PV exceeds SV AL H OFF i A g E Alarm will be disabled when the PV falls below SV AL L Aen ead ON EESE 12 Lower limit hysteresis alarm Alarm will be enabled when the PV falls below SV AL H OFF ry r Alarm will be disabled when the PV exceeds SV AL L AL H_ AL L 14 Programmable STOP Alarm will be enabled when the program is in STOP status 15 Programmable RAMP UP Alarm will be enabled when the program is in RAMP UP status 16 Programmable RAMP DOWN Alarm will be enabled when the program is in RAMP DOWN status 17 Programmable SOAK Alarm will be enabled when the program is in SOAK status 18 Programmable RUN Alarm will be enabled when the program is in RUN status Note AL H and AL L include AL1H AL2H and ALIL AL2L There is no mode 13 reserved for CT function E PID Programmable Control Functions and Parameter Setting The PID programmable control includes 8 patterns Pattern 0 7 Each pattern contains 8 steps Step 0 7 and parameters link pattern cycle and the number of steps Start Pattern Perak This parameter can be set in the operation mode The user can set up which pattern is the start pattern for the programmable co
6. 007 05 25 2 0 5011664500 DVEO ADELTA Http www delta com tw industrialautomation JD WG Series Valve Temperature Controller Instruction Sheet Thanks you very much for choosing Delta DTV series valve temperature controller Please read this instruction sheet before using your DTV to ensure proper operation Keep this instruction handy for quick reference E Warning DANGER CAUTION ELECTRIC SHOCK When the power is on DO NOT touch the AC terminals in case an electric shock may occur Make sure the power is disconnected when you check the input power DTV is an OPEN TYPE device If it will cause serious injury to workers or damage on other equipments when used in a dangerous environment please make sure it is installed in an automatic safety protection device 1 Always use recommended solder less terminals Fork terminal with isolation M3 screw Max width 7 2mm Please be sure to tighten them properly and make sure the wire is connected to the correct terminal 2 Prevent dust or metallic debris from falling into the device and cause malfunction DO NOT modify or uninstall DTV series without being permitted DO NOT use empty terminals 3 Keep away from high voltage and high frequency environment during installation in case of interference Prevent using DTV in premises which contain a dust or corrosive gas b high humidity and high radiation c shock and vibration The power has
7. Upper limit adjusting with feedback output Displayed when in valve feedback mode Press Wy Lower limit adjusting with feedback output Displayed when in valve feedback mode Press V Eid Adjusting PV offset Press V Upper limit for control output Press V Lower limit for control output Press gt Back to top Operation Mode use to set up SV Press V Control loop RUN STOP Press V Pera Start setting up patterns Set up when in PID programmable control mode Press V Set up the position of decimal point Not for thermocouple B R S type Press V Upper limit for alarm 1 Adjustable when ALA1 is enabled Press V Lower limit for alarm 1 Adjustable when ALA1 is enabled Press V Upper limit for alarm 2 Adjustable when ALA2 is enabled Press V Lower limit for alarm 2 Adjustable when ALA2 is enabled Press V Key locked mode Press Vv d Displaying and adjusting output percentage Displayed when in PID mode and manual RUN Press V Output percentage of valve feedback Displayed when there is valve feedback Press vy MM D A value of valve feedback Displayed when there is valve feedback Press gt Back to top Initial Setting Mode Set up input type Press yy Set up temperature unit Not displayed when in analog input mode Press V u Upper limit for the temperature range Press A ms Lower limit for the temperature range Press V Towle
8. ble to read max 16 bits of data 05H able to write 1 bit into the register Address 1000H 1001H 1002H 1003H 1004H 1005H 1006H 1009H 100AH 100BH 100CH 100DH 1010H 1012H 1014H 1015H 1016H 1017H 1018H 1019H 101AH 101BH 101CH 101DH 101EH 101FH 1020H 1021H 1023H 1024H 1025H 1026H 1027H 102AH 102BH 102CH 102FH 1030H 1040H 1047H 1050H 1057H 1060H 1067H 2000H 203FH 2080H 20BFH Address and content of the data register Content Present temperature value PV Set point SV Upper limit of temperature range Lower limit of temperature range Input sensor type Control method Selecting heating cooling control Proportion band value Ti value Td value Default integration value Offset compensation value for proportional control when Ti 0 SV of output hysteresis Read write of output percentage Upper limit regulation for analog linear output Lower limit regulation for analog linear output Temperature offset regulation value Analog decimal point setting Time from valve fully closed to fully open DeadBand setting of valve Upper limit for valve feedback signal Lower limit for valve feedback signal PID group setting SV for the corresponding PID setting Upper limit for control output Lower limit for control output Output mode for alarm 1 Output mode for alarm 2 System alarm setting Upper limit for alarm 1 Lower limit for alarm 1 Upper limit for alarm
9. ess once in the regulation or initial setting mode to return to the operation mode Selecting parameters In the operation regulation or initial setting mode press to select parameters for setup Setting up number parameters Find the parameters to be set up or modified Use O to modify the settings Press to move to the desired digit to be modified and the digit will flash Press to complete and save the setting Setting up non number parameters Find the parameter to be set up or modified and use O 02 to modify the setting The parameter will flash at this time Press to complete and save the setting Press for more than 3 secs Operation LC Mode Aaaa Press amp Press for less than 3 secs sae P S Initial Setting Mode Regulation Mode Press Ga Regulation Mode Auto tuning Set up when in PID control and RUN Press V Select the PID group 0 4 4 groups of PID are available in PID control n 4 PID is auto selected See the next table Press Vv PD control offset Press V Heating hysteresis setting Set up when in On Off control Press V ct Cooling hysteresis setting Set up when in On Off control Press V Heating cooling control cycle Press V Switch for valve feedback setting Press V Auto adjusting feedback value Displayed when in valve feedback mode and STOP Press V Time from valve fully closed to fully open Press Ve Valve DeadBand Setting Press V MEG
10. lt 0 run default 1 stop 0 run default 1 pause 0 without feedback default 1 with feedback 0 AT stops default 1 AT starts 4 Communication transmission format command 01 read bit 05 write bit 03 read word 06 write word ASCII Mode Read Command Read Response Message Write Command Write Response Message Start word an ae Start word oes ee Start word a om Start word as a a Machine address 1 0 Ko Machine address 1 0 0 Machine address 1 0 0 Machine address 1 0 0 Machine address 0 1 T Machine address 0 1 1 Machine address 0 1 1 Machine address 0 1 T Command 1 0 Ko Command 1 0 0 Command 1 0 ic Command 1 0 0 Command 0 io T Command 0 3 oe Command 0 6 5 Command 0 6 5 T 0 Length of response 0 0 1 0 1 0 ae oe 8 data byte s z Write data address z it Write data address gt H 0 Koj Data content in a T a 0 1 0 0 iD 1000H 081xH PF 0 0 F 0 F Pia a en z 1 Write data content z a Write data content 2 E 2 Q Data content in 0 g 0 g 0 LRC1 check E D 1001H 0 LRC1 F E LRC1 F E LRCO check A C 0 LRC 0 D Y LRC 0 D 3 End word 1 CR CR LRC1 check 0 E End word 1 CR CR End word 1 CR CR End word 0 LF LF LRCO check 3 F End word 0 LF LF End word 0 LF LF End word 1 CR CR End word 0 LF LF LRC check Sum
11. lt back to the CRC register 5 Repeat step 3 and 4 until the 8 bits 1 byte are all right shifted 6 Repeat step 2 and 5 and calcualte all the bits to obtain CRC check Please be aware of the high low byte transmission order in the CRC register E How to Mount 1 Insert DTV into the panel cutout 2 Insert the mounting bracket into the mounting groove at the top and bottom of DTV 3 Push the mounting bracket forward until the bracket stops at the panel wall 4 Tighten the screw E How to Install Mounting Bracket a eames p E Dimensions DTV4896 DTV9696 Riala f i Ee Es Ee ES 5 or 26 go mesran So ge Seong as 98 0m 3 86 91 0 mm 3 58 in 95 7 mm 3 77 in 98 2 mm 3 87 in Peres mers 96 0 mm 15 8mm 79 2 Mmm 3 78 in 0 62in 3 12 in 48 0 mm 12 8 mm 1 89in j 0 50in 79 2 mm 3 12 in J E Panel Cutout E Terminals DTV4896R DTV9696R DTV4896 DTV9696 DATA L 48 96 aoomin 9696 110 0 min ae D gt ogen l N a 5VA DATA OG TEON i er Co E tO ctose i 44 59s 0 6 i L 144 _ ge ceo GA oren is 20 moTor POWER 120 0 min 120 0 min 0 6 91 50 F E How to Set up Current Input For normal input default Current input 4 20mA 0 20mA JUMPER JUMPER JPT PIN HEADER JPI PIN HEADER DEFAULT SETTING The content of this instruction sheet may be revised without prior
12. m OUT OUT2 ALMI ALM2 x e oe 6 al Selection setup key W x H l i vy QO Switching page key R Valve relay output SPST 250VAC 5A Left shifting the digit 2 MA4BELTA DTV4896 E Specifications AC100 240V 50 60Hz 85 110 rated voltage Less than 5VA 2 line 7 segment LED 4bits and 2 bits of valve openness display PV in red SV and valve openness in green Thermocouple K J T E N R S B L U TXK Platinum resistance Pt100 JPt100 Analog input 0 5V 0 10V 0 20mA 4 20mA 0 50mA PID PID programmable control manual On Off Relay output SPST Max load 250V 5A resistive load 1 digit after the decimal point or no decimal point Analog input 0 15 sec thermocouple platinum resistance 0 4 sec 10 55Hz 10m s 3axes 10min Max 300m s 3 axes 6 directions 3 times each 0 C 50 C 20 C 65 C Less than 2 000m 35 to 80 RH non condensing Power input Input power range Power consumption Display Input temperature sensor Control method Control output type Display scale Sampling cycle Vibration resistance Shock resistance Ambient temperature Storage temperature Operation altitude Ambient humidity E Setting up Parameters Switching Modes DTV is in the operation mode when the power is switched on displaying PV and SV Press for more than 3 seconds to enter the initial setting mode Press for less than 3 seconds in the operation mode to enter the regulation mode Pr
13. notice Please consult our distributors or download the most updated version at http www delta com tw industrialautomation
14. ntrol This function is only available when the program is in STOP status Step Includes the settings of the two parameters set point X and execution time T indicating that the set point SV has to rise to temperature X after the period of execution time T If the result of the set point X is the same as that of the previous setting the process is called Soak otherwise it is called Ramp Therefore the programmable control is also known as Ramp Soak control The default setting of the first step program is Soak control The temperature will first rise to the set point X and remain at X The total execution time is T Link Pattern For example if the parameter is set as 2 it refers to the execution of pattern 2 will follow the execution of pattern 0 If the link pattern is set as ort it refers to the program will end after the execution of the pattern is completed and the temperature will remain at the SV for the last step Cycle The additional number of cycles for a pattern For example if the parameter is set as 2 it refers to pattern 4 has to execute twice additionally totaling the executions to 3 times including the original one The Number of Steps The number of steps in each pattern range 0 7 For example if the parameter ae is set as 2 it refers to pattern 7 will execute step 0 step 2 and other steps will not be executed The Execution 1 When the parameter Leg is set as Lol the program will start its execution from
15. parameter uher the program will automatically switch back to the no feedback state To ensure the correctness of the valve control please make sure that you have set up the parameters below E Time required from the valve fully closed to fully open This parameter has to be correct when the valve is without feedback signal otherwise the accuracy for the temperature control will be affected The PID control will correspond to the openness of the valve according to the setting of this parameter DeadBand value of the valve The parameter is to prevent frequent movement of the valve For example assume the DeadBand is 4 PID control will correspond to the openness of the valve within 4 and the valve will not move within the range unless the value is accumulated and exceeds 4 If the Deadband value is too small and the valve is set to have feedback signals moving back and forth of the valve will shorten the life of the valve motor MEF With or without feedback signals When u Fbl is set as On it refers to with feedback signals and the following parameters will be displayed 1 a when a is set as StoP Automatically adjusting the upper lower limit of the valve feedback This parameter will only be displayed When this parameter is set as On the relay will enable the forward and reverse running of the motor in order to calculate the time needed from the valve fully closed to fully open and the feedback signal of full
16. step 0 of the start pattern 2 When the parameter E 3 When the parameter is setas ba the program stops When you select again the program will execute again from step 0 of the start pattern 4 When the parameter is set as PHoc the program will stop and the temperature will stop at the SV before the program stops When you select and execute by the remaining time is set as HZH the program will stop and the control output will be disabled E y the program will stop and the temperature will stop at the SV before run again the program will resume the step before the program stops Display In PID programmable control some SVs are re set as P XX P refers to the current pattern and XX refers to the current step Press B02 to modify the display Select and press g SV will display the target temperature for the current step Select and press g SV will display the remaining time of the current step E PID Control In PID control you can select any one of the 4 groups of PID parameter P I D IOF After auto tuning the PID value and the temperature SV will be stored into the selected PID parameter GAT PIDn n 0 4 0 3 are the corresponding selected PID parameter Pedy refers to auto selected PID and the program will automatically select a most useful PID parameter based on the current SV SV displays will be Sud corresponding to n 0 3 The SV for the selected PID parameter can be set by the
17. to be switched off when wiring or changing temperature sensor Make sure to use compensation wire which matches the thermocouple when extending or connecting the thermocouple wire Use wires with resistance when extending or connecting the platinum resistance sensor Keep the wire as short as possible when wiring a sensor to the temperature controller Separate the power cable and load wire in order to prevent interference and induced noise DTV is an open type device Make sure to install it in an enclosure which prevents dust and humidity in case of an electric shock 9 Make sure the power cables and signal device are installed correctly before switching on the power otherwise serious damage may occur 10 DO NOT touch the terminals or repair the device when the power is on otherwise an electric shock may occur 11 Please wait for one minute after the power is switched off to allow the capacitor to discharge DO NOT touch the internal wiring within this period 12 DO use dry cloth and DONOT use acid or alkaline liquid to clean the device E Display LED amp Pushbuttons PV Present value SV Set value Output percentage AT Auto tuning indicator A M Manual control indicator NAMA go E Ordering information DTV 1 2 3 4 5 DTV Delta V series valve temperature OUT1 OUT2 Output indicator Series name Santraller sv ALM1 ALM2 Alarm output indicator MMS il Manual auto mode switch key T o 7 a a x mi
18. up from machine address to data content e g 01H 03H 10H OOH OOH 02H 16H Obtain 2 s complement EA RTU Mode Read Command Machine address 01H 01H Read Response Message Write Command Machine address 01H 01H Machine address 01H Write Response Message 01H Machine address 01H 01H Command 03H 01H Command 03H 01H Command O6H 05H Command O6H 05H Read start 10H 08H Length of response 04H 02H Write data 10H 08H Write data 10H O8H address of data OOH 10H data byte address 01H 10H address 01H 10H Read lengthof OOH OOH Daia contenti 01H 17H Write data 03H FFH Write data 03H FFH data bit word 02H O9H F4H 01H content 20H OOH content 20H OOH CRC low byte COH BBH Data content 2 03H CRC low byte DDH 8FH CRC low byte DDH 8FH CRC high byte CBH A9H 20H CRC high byte E2H 9FH CRC high byte E2H 9FH CRC low byte BBH 77H CRC high byte 15H 88H CRC Cyclical Redundancy Check is obtained by the following steps 1 Load in a 16 bit register FFFFH as the CRC register 2 Do an exclusive OR operation of the first byte of the data and low byte of CRC register and place the operation result back to the CRC register 3 Right shift the bits in the CRC register and fill the high bits with 0 Check the removed lowest bit 4 If the removed lowest bit is O repeat step 3 Otherwise do an exclusive OR operation of the CRC register and the value A001H and place the operation resu
19. user or auto generated by auto tuning E Valve Control Heaters and coolers can be used to control the temperature and the openness of the valve in order to control the flow of the medium Current and voltage can control the openness of the valve however the most direct and economic way to control the openness of the valve is the relay To control the valve by voltage and current you can use the DTB series analog output controller If you tend to use relay for the control output you have to choose the valve function in DTV series The two control outputs are relay output for the forward reverse running of the motor to drive the opening and closing of the valve Control output1 controls the opening of the valve and control output 2 controls the closing of the valve in order to adjust the position of the valve In order to detect the position of the valve DTV is able to receive feedback signal and no feedback signal When there is no feedback signal and the valve is fully open control output 1 will output continuously If at the moment the valve is fully closed control output 2 will output continuously If the valve you use is with feedback output you can connect the output of the valve to the feedback part of DTV and set wil to On to precisely control the openness of the valve If there is no feedback signal or the feedback signal is incorrect and the pre set openness of the valve is not reached after twice as long as the time set in the
20. ut 17 Au 999 9 999 4 20mA analog input 16 a s 999 9 999 0 20mA analog input 15 a o 999 9 999 OV 10V analog input 14 nig Meh 999 9 999 OV 5V analog input 13 999 9 999 Platinum resistance Pt100 12 200 600 C Platinum resistance JPt100 11 JPt 20 400 C Thermocouple TXK type 10 ie 200 800 C Thermocouple U type 9 200 500 C Thermocouple L type 8 200 850 C Thermocouple B type 7 100 1 800 C Thermocouple S type 6 0 1 700 C Thermocouple R type 5 oe 0 1 700 C Thermocouple N type 4 a 200 1 300 C Thermocouple E type 3 0 600 C Thermocouple T type 2 200 400 C Thermocouple J type 1 100 1 200 C Thermocouple K type 0 had 200 1 300 C Note 1 The current input is built in with a 249Q precision resistor See How to Set up Current Input section Note 2 The default setting is Pt100 input Note 3 To display the decimal point you have to set up the parameter in the operation mode The decimal point display is available for all modes except for thermocouple B R and S type Note 4 The range for analog input is 999 9 999 Take 0 20mA for example 999 refers to OmA input and 9 999 refers to 20mA input If we change the range into 0 2 000 0 will thus refer to OmA input and 2 000 refers to 20mA input 1 display scale 0 01mA E Alarm Output DTV offers 2 groups of alarm outputs and 17 modes for each group under the initial setting mode When the PV exceeds or falls belo
21. w SV the alarm output will be enabled See the table below for the 17 alarm output modes Mode Alarm Type Alarm Output Operation 0 No alarm Off ON 1 Alarm output is enabled when the temperature reaches upper and lower limits OFF Alarm will be enabled when the PV exceeds SV AL H or falls below SV AL L ae ON 2 Alarm output will be enabled when the temperature reaches the upper limit OFF Alarm will be enabled when the PV exceeds SV AL H A A SV AL H 3 Alarm output is enabled when the temperature reaches the lower limit ae Alarm will be enabled when the PV falls below SV AL L HA x ON C 4 Alarm output will be enabled when the PV is between SV AL H and SV AL L OFF 2 AL L SV AL H Alarm output is enabled when the temperature reaches the absolute value of the upper ON M i 5 and lower limits OFF re Alarm will be enabled when the PV exceeds AL H or falls below AL L AL L AL H Alarm output is enabled when the temperature reaches the absolute value of the upper ON i 6 limit OFF FT Alarm will be enabled when the PV exceeds AL H AL H Alarm output is enabled when the temperature reaches the absolute value of the lower ON 7 limit OFF lt Alarm will be enabled when the PV falls below AL L AL L Mode Alarm Type Alarm Output Operation ON 8 Standby upper lower limit alarm Alarm will be enabled when the PV reaches SV and OFF exceeds SV AL H or falls below SV AL L a A A AL L SV AL H ON 9 Upper limit standby
22. y closed and open The feedback signal is the hardware D A value of the valve control which is for the calculation of the valve controller b HEN Upper limit of the valve signal Set c E Auto Manual Mode Switch A M indicator On refers to manual mode A M indicator Off refers to auto mode Besides On Off PID programmable and manual controls the valve control is also able to forcibly switch to manual control fixing the openness of the valve unit from valve fully closed to fully open when in PID control mode You simply need to press in PID control mode to switch to manual mode and A M indicator will be On Press again to return to PID control and A M indicator will be Off as On can be set automatically or manually Lower limit of the valve signal Set lu RE as On can be set automatically or manually E Upper Lower Limits of Valve Openness Assume we would like the maximum openness of the valve to be 80 and the minimum to be 20 set the parameter as 80 and onin as 20 and the valve openness of PID control programmable control and manual control will fall within this range E RS 485 Communication Supports transmission speed 2 400bps 4 800bps 9 600bps 19 200bps and 38 400bps does not support communication format 7 N 1 8 E 2 8 O 2 Communication protocol Modbus ASCII or RTU Function 03H able to read max 8 words in the register 06H able to write 1 word into the register 01H a
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