CD-7021/CB7021P & CB-7022, CB
Contents
1. 68 4 3 1 INIT pin Operation 68 22 Mod le Sas an bus A 68 3 3 Dual Watchdog Operation 69 A DD N USER UR EE 69 3 5 Analog OutpUt E E 38 69 3 6 Slew Rate Contro l 70 o Current RC ODA 71 HM CB COM 7021 24 p65 CB 7021 CB 7022 CB 7024 User s Manual CB 7021 CB 7022 CB 7024 User s Manual 1 Introduction CB 7000 is a family of network data acquisition and control modules They provide analog to digital digital to analog digital input output timer counter and other functions These modules can be remote controlled by a set of commands The basic features of CB 7021 CB 7021P CB 7022 and CB 7024 are given as following e 3000 VDC isolated analog output e Programmable PowerOn Value of analog output e Programmable slew rate e Software calibration The CB 7021 is an analog output module with 12 bit reso lution and current readback function The CB 7021P is similar with CB 7021 but with 16 bit resolution The CB 7022 is the dual channel version of CB 7021 The CB 7024 is a 4 channel analog output module and supports bipolar voltage outputs 1 1 More Information Refer to CB 7000 Bus Converter User Manual chap ter 1 for more information as following 1 1 CB 7000 Overview 1 2 CB 7000 Related Documentation 1 3 CB 7000 Command Features 1 4 CB 7000 System Network2. VOUT VOUT Ext PWR TIOUT IOUT VOUTI VOUT1 Ext PWR1 HOUTI IOUT1 VOUTO VOUTO Ext PWRO TIOUTO IOUTO Vout0 EEPROM Tout Photo Isolation Embedded A J gt Controller 7 RS 485 Vout3 E Interface Iout3 Power e Regulator AGND CB 7021 CB 7022 CB 7024 User s Manual 13 1 5 Jumper Setting Jumper select the current output power supply of CB 7021 21P 1 2 Select internal power of module The default setting can drive a load of up to 500 ohms Select external power of module can drive larger load With 24V power it can drive 1050 ohms Select e O Internal o Power JP 1 7021P N Select External e Power JP Jumper select the current output power supply of CB 7022 1 2 de JP1 for channel 0 setting and JP2 for channel 1 setting Select internal power 500 ohms load max External power 1050 ohms with external 24VDC power Select j Internal e Power 1P2 Select e Internal Power JP 1 6 Wire Connection CB 7021 21P 22 Voltage Output Wire Connection HIS TAS Load 14 VOUT VOUT Select External Power Select 9 External 9 e Power P CB 7021 CB 7022 CB 7024 User s Manual CB 7021 21P 22 Current Output Wire Connection Select 0 Internal 1 Power pj I 08 our E o Se CB 7024 Voltage Output Wire Connection
3. T neo VoutN amp Pell CB 7024 Current Output Wire Connection AW e IoutN Load n e T 1 7 Quick Start Refer to CB 7000 Bus Converter User Manual and Getting Started for more detail 1 8 Default Setting Default setting for CB 7021 CB 7021P CB 7022 and CB 7024 e Address 01 e Analog Output Type O to 10V e Baud rate 9600 bps e Checksum disable change immediate engineer unit format e CB 7021 CB 7021P CB 7022 jumper setting internal power CB 7021 CB 7022 CB 7024 Users Manual 15 1 9 Calibration D on t Perform Calibration Until You Understand Procedure CB 7021 21P Current Output Calibration Sequence i eg ae BO m 16 Set the jumper 1 to internal power and connect milliammeter to module s current output If a milliammeter in not available use Volt Meter with shunt resistor 250 ohms 0 1 Calculate the output current by the Volt Meter value I 2 V 250 pens as Z Pakana p Meter IOUT Volt Meter IOUT Warm Up for 30 minutes Setting type to 30 0 to 20 mA Refer Sec 2 1 Program output for 4 mA Refer Sec 2 7 Check the meter and trim the output until 4 mA match by apply trim command Refer Sec 2 10 Preform 4 mA Calibration Command Refer Sec 2 8 Program output for 20 mA Refer Sec 2 7 Check the meter and trim the output until 20 mA obtained by trim command Refer Sec 2 10 Perform 20 mA Calibration Command Refer Sec 2 9 CB 7021 CB 7022
4. 10V Calibration Command gt Refer Sec 2 16 7 Program output for 10V Refer Sec 2 15 8 Check the meter and trim the output for 10V match by using trim command gt Refer Sec 2 16 9 Perform 10V Calibration Command gt Refer Sec 2 17 10 Repeat 1 to 9 for channel 1 2 and 3 CB 7021 CB 7022 CB 7024 User s Manual 2 1 10 Configuration Tables Baud rate Setting CC c SEBE BE BEME BE a Analog Output Type Setting TT O ofa O TT TT sr Pi xp oma wj ev uv ow av Ma ow 20 nw m sov sov sv sv Note For 1 7021 21P 24 For 1 7024 only roe only Data Format Setting FF 1 Checksum Bit O Disable 1 Enable 2 Slew Rate Control for CB 7021 21P and CB 7024 Refer Sec 3 6 for de tails for CB 7022 set to O 3 00 Engineering Unit Format 01 Percent of Span Format For CB 7021 21P 22 10 Hexadecimal Format For CB 7021 21P 22 252 CB 7021 CB 7022 CB 7024 User s Manual Slew Rate for I 7021 21P and I 7024 ViSecond mA Second mA Second Immediate 1000 80 160 2 EUN 5 The config 1111 is for I 7024 only 0 5 1 0 2 0 0 Analog Output Type and Data Format for I 7021 21P CB 7021 CB 7022 CB 7024 User s Manual 23 Analog Output Type and Data Format for I 7022 Min TES 2 NLiE Engineer Unit Unit 20 000 04 000 4 to 20 mA of Span 100 00 000 00 0 to 10 V of Span 4100 00 000 00 Analog Output Type and Data Format for Ex
5. CB 7021 CB 7022 CB 7024 User s Manual 57 LL Description Host OK Host sends this command to all modules broadcasting that the host 1s OK Command CHK cr Delimiter character Tm command for all modules Response No response Example Command No response Send Host OK to all modules Related Command Sec 2 26 AAO Sec 2 27 AA1 Sec 2 28 AA2 Sec 2 29 AA3EVV Sec 2 30 AA4 Sec 2 31 AAAN Sec 2 32 A A5 Sec 2 33 AASN Related Topic Sec 3 2 Module Status Sec 3 5 Dual Watchdog Operation 58 CB 7021 CB 7022 CB 7024 User s Manual 2 26 AA0 Description Read Module Status Syntax AA0 CHK cr Delimiter character AA Address of reading module 00 to FF 0 Command for reading module status Response Valid Command AASS CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get response Delimiter for valid command Delimiter for invalid command Address of response module 00 to FF Module Status The status will store into EEPROM and only may reset by the command AA1 arcc Host watchdog enable flag O Disable 1 Enable 2 Host watchdog timeout flag 0 Clear 1 Set Example Command 010 Receive 0104 Read address 01 module status returns 04 host watchdog timeout flag is set Related Command Sec 2 27 AA Sec2 29 AA3EVV Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation CB 7021 CB 7022 CB 7024
6. 24 Program output 10V gt Refer Sec 2 15 Check the meter and trim the output for SM L lk a 10V match by using trim command gt Refer Sec 2 18 6 Perform 10V Calibration Command gt Refer Sec 2 21 Repeat step 1 to 6 for channel 1 ey CB 7021 CB 7022 CB 7024 User s Manual 19 CB 7024 Current Output Calibration Sequence 1 Connect meter and external power source to module s current output channel 0 ToutN KG c e ToutN d Meter Dl 2 e ACAD Volt Meter O ACAD 2 Warm Up for 30 minutes 3 Set type to 30 0to 20 mA Refer Sec 2 1 4 Program output for 0 mA Refer Sec 2 15 5 Check the meter and trim the output for O mA match by using trim command gt Refer Sec 2 16 6 Perform 0 mA Calibration Command gt Refer Sec 2 16 7 Program output for 20 mA Refer Sec 2 15 8 Check the meter and trim the output for 20 mA match by using trim command gt Refer Sec 2 16 9 Perform 20 mA Calibration Command gt Refer Sec 2 17 10 Repeat 1 to 9 for channel 1 2 and 3 20 CB 7021 CB 7022 CB 7024 User s Manual CB 7024 Current Output Calibration Sequence 1 Connect meter to module s voltage output channel 0 V Volt Meter e AGND 2 Warm Up for 30 minutes 3 Setting type to 33 10 to 10V Refer Sec 2 1 4 Output 10V Refer Sec 2 15 2 Check the meter and trim the output for 10V match by using trim command gt Refer Sec 2 16 6 Perform
7. 7022 CB 7024 User s Manual 41 2 13 AA7 Description Perform 10V Calibration Note The command is for CB 7021 21P only Syntax SAA7 CHK cr Delimiter character AA Address of setting module 00 to FF 1 command for performing 10V calibration Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 017 Receive 01 Perform address 01 10V calibration returns successful Related Command Sec 2 10 AA3VV Related Topics Sec 1 9 Calibration 42 CB 7021 CB 7022 CB 7024 User s Manual 2 14 AA8 Description Current Readback Note The command is for CB 7021 21P only Syntax SAA6 CHK cr Delimiter character AA Address of reading module 00 to FF 8 Command for current readback Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data The current output value Refer to Sec 1 9 for format Example Command 012 Receive 01320614 Read address 01 configuration returns output type 0 to 10V 9600 bps eng unit format and slew rate is 1 0V Second Command 0110 000 Receive 01 Set address 01 output 10 0V returns succes
8. 9 Command for reading DA configuration N Channel to read DA configuration 0 to 1 Response Valid Command AATS CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get a response Delimiter for valid command Delimiter for invalid command Address of response module 00 to FF Analog output type See Sec 1 10 for format E y Analog output slew rate See Sec 1 10 for format Example Command 0190 Receive 0110 Read address 01 channel 0 DA configuration returns 4 to 20 mA output and change immediate Related Command Sec 2 24 SAA9NTS 56 CB 7021 CB 7022 CB 7024 User s Manual 2 24 AA9NTS Description Set DA Configuration of Channel N Note The command is for CB 7022 only Syntax SAA9NTS CHK cr Delimiter character AA Address of reading module 00 to FF 9 Command for setting DA configuration N Channel to set DA configuration 0 to 1 T Analog output type Refer Sec 1 10 for type select S Analog output slew rate Refer Sec 1 10 for slew rate select Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get a response Delimiter for valid command d Delimiter for invalid command AA Address of response module 00 to FF Example Command 5019121 Receive 01 Set address 01 channel 1 DA configuration O to 10V output and slew rate 0 625 V Second returns successful Related Command Sec 2 23 SAAIN
9. Configuration 1 5 CB 7000 Dimension 6 CB 7021 CB 7022 CB 7024 User s Manual 1 2 Pin Assignment CB 7021 CB 7022 CB 7024 User s Manual 0I AND SA QD WLVa VI VQ A x LINI CB 7021 CB 7022 CB 7024 User s Manual 6 0I AND D SA QD VIVQq GO VI VQ A x LINI CB 7021 CB 7022 CB 7024 User s Manual 1 3 Specifications CB 7021 Analog Output Output Channel 1 Output Type mA V Accuracy 0 1 of FSR Resolution 0 02 of FSR Readback Accuracy 1 of FSR Zero Drift Voltage output 30uV C 0 2uA PC Span Temperature Coefficient 25ppm C Programmable Output Slope 0 125 to 1024 mA Second 0 0625 to 512 V Second Voltage Output 10 mA max Current output Current Load Resistance Internal power 500 ohms External 24V 1050 ohms Isolation 3000VDC Power Supply Input 10 to 30VDC Consumption 1 8 W 10 CB 7021P Analog Output Output Channel 1 Output Type mA V Accuracy 0 02 of FSR Resolution 0 002 of FSR Readback Accuracy 1 of FSR Zero Dritt Voltage output 10uV C 0 2uA C Span Temperature Coefficient 5ppm C Programmable Output Slope 0 125 to 1024 mA Second 0 0625 to 512 V Second Voltage Output 10 mA max Current output Current Load Resistance Internal power 500 ohms External 24V 1050 ohms Isolation 3000VDC Power Supply Input 10 to 30VDC Consumption 1 8 W CB 7021 CB 7022 CB 70
10. and other information Sometimes a user may forget the configuration of the module Therefore the CB 7000 have a special mode named INIT mode to help user to resolve this problem The INIT mode is setting as Address 00 baud rate 9600bps no checksum To enable INIT mode please follow these steps Step l Power down the module Step 2 Connect the INIT pin with the GND pin Step 3 Power up the module Step 4 Send command 002 cr in 9600 bps to read the con figuration stored in the module s EEPROM Refer to 7000 Bus Converter User Manual Sec 5 1 and Getting Started for more information 3 2 Module Status Power On Reset or Module Watchdog Reset will put all outputs to the PowerOn Value The module can accept the host s command to change the output value Host Watchdog Timeout puts all outputs to the Safe Value The host watchdog timeout flag 1s set and an output command will be ignored The module s LED will flash The user must reset the Module Status via command to go to normal operation 68 CB 7021 CB 7022 CB 7024 User s Manual 3 3 Dual Watchdog Operation Dual Watchdog Module Watchdog Host Watchdog The Module Watchdog 1s a hardware reset circuit used to monitor the module s operating status While working in harsh or noisy environment the module may go down caused by a noise signal The outputs go to the PowerOn Value The module can accept the host s command to change the output val
11. the specifications for the minimum and maxi mum slew rates 3 7 Current Readback The CB 7021 21P 22 have an analog to digit converter to monitor the current output signal The current readback will indicate an open wiring or load when the readback value is far from the transmitted output value The CB 7024 does not have the analog to digit converter to monitor the current output signal But the CB 7024 can returns the current digital value transferred to the DAC NOTE The CB 7024 can t read the actual DAC output current value thus can t detect faulty wiring or loads CB 7021 CB 7022 CB 7024 User s Manual ya For Your Notes 72 CB 7021 CB 7022 CB 7024 User s Manual EC Declaration of Conformity We Measurement Computing Corp declare under sole responsi bility that the product CB 1021422122 Digital Output Modules Part Number Description to which this declaration relates meets the essential requirements is in conformity with and CE marking has been applied accord ing to the relevant EC Directives listed below using the relevant section of the following EC standards and other normative docu ments EU EMC Directive 89 336 EEC Essential requirements relat ing to electromagnetic compatibility EU 55022 Class B Limits and methods of measurements of radio interference characteristics of information technology equipment EN 50082 1 EC generic immunity requirements IEC 801 2 Electrostatic discharg
12. to ground Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command 7 Delimiter for invalid command While changing baud rate or checksum setting without shorting INIT to ground the module will returns an invalid command message AA Address of response module 00 to FF Example Command 960102300600 Receive 02 Change address from 01 to 02 returns successful Related Command Sec 2 2 SAA2 Related Topics Sec 1 10 Configuration Tables Sec 3 1 INIT pin Operation CB 7021 CB 7022 CB 7024 User s Manual 29 2 2 AA2 Description Read Configuration Syntax SAA2 CHK cr Delimiter character AA Address of reading module 00 to FF 2 Command for reading configuration Response Valid Command AATTCCFF CHK cr Invalid Command AA CHK cr Syntax error or comm error may get no response Delimiter for valid command P Delimiter for invalid command AA Address of response module 00 to FF TT Type code of module reference Sec 1 10 CC Baud rate code of module reference Sec 1 10 FF Data format of module reference Sec 1 10 Example Command 012 Receive 01300600 Read configuration of module in address 01 which is an CB 7021 module returns analog output O to 20 mA baud rate 9600bps no checksum engineering unit format and output change immediate Related Command Sec 2 1 JAANNTTCCFF Related To
13. 0h 30h 36h 30h 30h 1ABh The checksum is ABh and CHK AB Response string with checksum 01300600AB cr AANNTTCCFF Sec 2 1 AANNTICCFF Sec 2 2 26 CB 7021 CB 7022 CB 7024 User s Manual 1 7021 21P Analog Output Command Sets OO EO Anang Oupat Command Se pupa p loan anag is Ser svo IAA lan Catbraton seen san AA roma cain sueo sow ian rincon sec b taon ca All command for specificied channel N sany aa ination sexu uu an lamon sez saan aaway Last las e Sec220 saam faa mv amen ez saan asno curen Ren eer kaso fas fres Da Cp e227 CB 7021 CB 7022 CB 7024 User s Manual 2 17024 Analog Output Command Sets All commands for specificied channel N y na Current Value Readback zav Tj IAAVV Read Host Watchdog Sec 2 28 Timeout Value AA3EVV IAA ee Sec 2 29 Timeout Value 1 AA Data Read Safe Value Sec 2 30 AA Data u MANE OF Sec 2 31 Sek Sal Yine Sec 2 32 Safe Value of Channel Sec 2 33 28 CB 7021 CB 7022 CB 7024 User s Manual 2 1 JAANNTTCCFF Description Set module Configuration Syntax AANNTTCCFF CHK cr Delimiter character AA Address of setting module 00 to FF NN New address for setting module 00 to FF TT New type for setting module Ref Sec 1 10 CC New baud rate for setting module Ref Sec 1 10 FF New data format for setting module Ref Sec 7 70 When changing the baud rate or checksum short the INIT pin
14. 24 User s Manual CB 7022 Analog Output Output Channel 2 Output Type mA V Accuracy 0 1 of FSR Resolution 0 02 of FSR Readback Accuracy 1 of FSR Zero Drift Voltage output 30uV C Current output 0 2uA C Span Temperature Coefficient 25ppm C Programmable Output Slope 0 125 to 1024 mA Second 0 0625 to 512 V Second Voltage Output 10 mA max Current Load Resistance Internal power 500 ohms External 24V 1050 ohms Isolation 3000VDC Channel to channel isolation Power Supply Input 10 to 30VDC Consumption 3 0 W CB 7021 CB 7022 CB 7024 User s Manual CB 7024 Analog Output Output Channel 4 Output Type mA V Accuracy 0 1 of FSR Resolution 0 02 of FSR Zero Drift Voltage output 30uV C Current output 0 2uA C Span Temperature Coefficient 20ppm C Programmable Output Slope 0 125 to 2048 mA Second 0 0625 to 1024 V Second Voltage Output 5 mA max Current Load Resistance External 24V 1050 ohms Isolation 3000VDC Power Supply Input 10 to 30VDC Consumption 2 3 W 11 1 4 Block Diagram EEPROM Photo Isolation Embedded Controller B RS 485 Interface T Power Regulator V1 a ma Photo Isolation Controller Embedded K J7 A li RS 485 Interface TV 45V vo 7021 7021P Buffer Power e Trecia B V0 12 CB 7021 CB 7022 CB 7024 User s Manual
15. CB 7021 CB 7022 CB 7024 User s Manual 45 Read address 01 channel 0 DA config returns 4 to 20 mA output and change immediate Command 01005 000 Receive Output address 01 channel 0 value 5 0 mA returns success ful Command 01025 000 Receive 01 Output address 01 channel 0 value 25 mA returns out of range and the output of channel O is set to the 20 0 mA Example for CB 7024 Command 012 Receive 01300600 Read address 01 configuration returns type 0 to 20mA 9600 bps and engineer unit format output change immediate Command 010 05 000 Receive Output address 01 channel 0 value 5 0 mA returns success ful Command 010 25 000 Receive 01 Output address 01 channel 0 value 25 0 mA returns the value is out of range and the output of channel 0 is set to the 20 0 mA Related Command Sec 2 1 YAANNTTCCFF Sec 2 2 AA2 Related Topics Sec 1 10 Configuration Tables Sec 5 5 Analog Output 46 CB 7021 CB 7022 CB 7024 User s Manual 2 16 SAAON Description CB 7022 Perform 4 mA Calibration for Channel N CB 7024 Perform 0 mA 10V Calibration for Channel N Note The command is for CB 7022 and CB 7024 only Syntax SAA0N CHK cr Delimiter character AA Address of setting module 00 to FF 0 command for doing 4 mA or 0 mA 10V calibration N channel to calibrate 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication
16. CB 7024 User s Manual CB 7021 21P Voltage Output Calibration Sequence 1 Connect voltmeter to module s voltage output V Volt Meter e VOUT 2 Warm Up for 30 minutes 3 Set type to 32 O to 10V Refer Sec 2 1 4 Program output for 10V Refer Sec 2 7 5 Check Refer Sec 2 13 CB 7021 CB 7022 CB 7024 User s Manual 17 CB 7022 Current Output Calibration Sequence 1 Set the jumper to internal power and connect milliammeter to module s current output channel 0 If a milliammeter is not avail able use a Volt Meter with shunt resistor 250 ohms 0 1 and calculate the mA by the Volt Meter value I 2 V 250 2 Warm Up for 30 minutes 3 Set output type to 0 O to 20mA Refer Sec 2 24 Program output for 4 mA Refer Sec 2 15 akal Bka wa IOUTO SEE ES IOUTO mA Meter IOUTO Volt Meter IOUTO 5 Check the meter and trim the output for 4 mA match by using trim command Refer Sec 2 16 Preform 4 mA Calibration Command Refer Sec 2 16 Program output 20 mA Refer Sec 2 15 8 Check the meter and trim the output until 20 mA match by using trim command Refer Sec 2 16 9 Perform 20 mA Calibration Command Refer Sec 2 17 10 Repeat step 1 to 9 for channel 1 18 CB 7021 CB 7022 CB 7024 User s Manual CB 7022 Voltage Output Calibration Sequence 1 Connect voltmeter to module s voltage output V Volt Meter e VOUTO Warm Up for 30 minutes Set output type to 2 0 to 10V gt Refer Sec 2
17. CB 7024 User s Manual 2 7 AA Data Description Output Analog Value Note The command is for CB 7021 21P only Syntax AA Data CHK cr Delimiter character AA Address of output module 00 to FF Data analog output value reference Sec 1 10 for its format Response Valid Command gt CHK cr Out of Range AA CHK cr Ignore Command CHK cr Syntax error or communication error may get no re sponse gt Delimiter for valid command Ni Delimiter while the Data 1s out of range and the output will go to the closest value in the setting of module s range Delimiter for the module s host watchdog flag is set and the output command will be ignored and the output is set to Safe Value AA Address of response module 00 to FF Example Command 012 Receive 01300600 Read Address 01 configuration returns output type 0 to 20 mA engineer unit format and output change immediate Command 0105 000 Receive gt Output address 01 value 5 0 mA returns successful Command 0125 000 Receive 01 Output address 01 value 25 0 mA returns the value is out of CB 7021 CB 7022 CB 7024 User s Manual 35 range and the output is set to 20 0 mA Command 022 Receive 102300601 Read address 02 configuration returns output type O to 20 mA percent of span format output change immediate Command 02 050 00 Receive Output address 02 value 50 210 mA returns successful Command 032 Receive 02300602 Re
18. CB 7024 only Syntax SAASN CHK cr Delimiter character AA Address of reading module 00 to FF 8 Command for read current output value N Channel to readback 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data Last output command value See Sec 1 9 for format Example for CB 7024 Command 012 Receive 01320614 Read address 01 configuration returns output type 0 to 10V 9600 bps engineer unit format and slew rate is 1 0V Second Command 010 10 000 Receive 01 Set address 01 channel 0 output 10 0V returns successful Command 0160 Receive 01 10 000 Read address 01 channel 0 last output command value re turns 10 000 54 CB 7021 CB 7022 CB 7024 User s Manual Command 0180 Receive 01 01 000 Read address 01 channel 0 current value returns 1 0V Command 0180 Receive 01 01 500 Read address 01 channel 0 current value returns 1 5V Related Command Sec 2 15 AAN Data Sec 2 20 SAAGN Related Topics Sec 3 7 Current Readback CB 7021 CB 7022 CB 7024 User s Manual 55 2 23 SAAIN Description Read DA Configuration of Channel N Note The command is for CB 7022 only Syntax SAA9N CHK cr Delimiter character AA Address of reading module 00 to FF
19. CD 7021 CB7021P 8 CB 7022 CB 7024 User s Manual A MEASUREMENT COMPUTING Copyright Sept 2000 All rights are reserved CB 7021 CB 7022 CB 7024 User s Manual Table of Contents IN LA AAP 6 LI More Information sur 6 1 2 Pin ASSIentmerit esc 7 3S AA d n cac h 22300698 10 VA Block Dias talit E 12 5 Juttiper O GUL O eree AA 14 1 0 Wire C ONNCCHOM ra 14 IAS deri T WW E a0AN 15 Lis Defa lt Scans tati 15 O Cambra a 16 1 10 Configuration Tables 22 IA AAA ON 26 2 1 Y AANNTTECHE saaan 29 US A AN 30 2 3 O A A A 31 o NE EEE ESE 32 an PAA 33 ZOOM Foree Asin W n w n n n n n NENA 34 2 7 HAA DALA cocooocccconcccnoncccncnncncnonacononacononicons 35 oA O 37 2 0 D AUT aee d eee eek tease te rrr 38 PALDA DE REM 39 Z CB 7021 CB 7022 CB 7024 User s Manual A ov m 40 2I AU edidi die EE EE 41 ZAS DAA ds 42 2 PAG ER 43 2 15 HAAINGD ata ais 45 2 16 AAN ceto a heath pna ann namasa 47 QI WES Vu MSD ult tla scared ee 48 2 18 SAASNVV Ma eit eati o tet 49 2 19 AA4N ee RN ER kk 50 DDS A O BB 51 2 5T YAN e Ke ores E DE 52 PAPA A N m 53 SN rr 54 20959 AYA VIN est it desees 56 DON o a 57 IE E rrr 58 ZANA A adu 452250502552 ELSE ee 59 DAMA S qM T AA AA 60 2 2 9 FAA Dat 61 pap NU e lI Ni orerar aE 62 DBO OP TR 64 2 9 AD N DNA 65 2192 FAA lid 66 US AA 67 CB 7021 CB 7022 CB 7024 User s Manual 3 3 Application Note
20. K cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 0100 000 Receive Set address 01 output 0 0 mA returns successful Command 014 Receive 01 Set address 01 PowerOn Value returns successful The module 01 will go to 0 0 mA with module power on Related Command Sec 2 7 AA Data Related Topics Sec 3 5 Analog Output 40 CB 7021 CB 7022 CB 7024 User s Manual 2 12 AA6 Description Last Value Readback Note The command is for CB 7021 21P only Syntax SAA6 CHK cr Delimiter character AA Address of reading module 00 to FF 6 Command for reading last output command value Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data The last output command value If no output applied to the module the Data 1s the PowerOn Value of the module Refer to Sec 1 10 for formatting Example Command 0110 000 Receive 01 Set address 01 output 10 0 returns successful Command 016 Receive 0110 000 Read address 01 last output command value returns 10 000 Related Command Sec 2 7 tA A Data Sec 2 14 AA8 Related Topics Sec 3 7 Current Readback CB 7021 CB
21. Type Code Output Range Data Format EEE aa CB 7021 CB 7022 CB 7024 User s Manual DA Configuration of CB 7022 Analog Output Type T 0 OmA to 20 mA current output 4mAto20 mA current output 2 OV to 10V voltage output Slew Rate Control S Immediate change 0 0625 V Second or 0 125 mA Second 0 125V Second or 0 25 mA Second 0 25V Second or 0 5 mA Second 0 5V Second or 1 0 mA Second 1 0V Second or 2 0 mA Second 2 0V Second or 4 0 mA Second 4 0V Second or 8 0 mA Second 8 0V Second or 16 mA Second 16V Second or 32 mA Second 32V Second or 64 mA Second 64V Second or 128 mA Second 128V Second or 256 mA Second 256V Second or 512 mA Second 512V Second or 1024 mA Second HUH OW AE NON ON AU AR ON mn oO CB 7021 CB 7022 CB 7024 User s Manual 25 2 Command Command Format Leading Address Command CHK cr Response Format Leading Address Data CHK cr CHK 2 character checksum cr end of command character character returns OxOD Calculate Checksum 1 Calculate ASCII sum of all characters of command or response string except the character returns cr 2 Mask the sum of string with Offh Example Command string 012 cr Sum of string 0 1 2 24h 30h 31h 32h B7h The checksum is B7h and CHK B7 Command string with checksum 012B7 cr Response string 01300600 cr Sum of string 0 1 3 0 0 6 0 0 21h 30h 3 1h 33h 3
22. User s Manual 59 2 27 AA1 Description Reset Module Status Command AA1 CHK cr Delimiter character AA Address of setting module 00 to FF 1 Command for reset module status Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax or communication error may not get a response Delimiter for valid command P Delimiter for invalid command AA Address of response module 00 to FF Example Command 010 Receive 0104 Read address 01 module status returns 04 host watchdog timeout flag is set Command 011 Receive 01 Reset address 01 module status returns successful Command 010 Receive 10100 Read address 01 module status returns 00 Module Status 1s clear Related Command Sec 2 25 Sec 2 26 AAO Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation 60 CB 7021 CB 7022 CB 7024 User s Manual 2 28 AA2 Description Read Host Watchdog Timeout Interval Command AA2 CHK cr Delimiter character AA Address of reading module 00 to FF 2 Command for reading host watchdog timeout interval Response Valid Command AAEVV CHK cr Invalid Command AA CHK cr Syntax or communication error may not get a response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF E 1 Enable 0 Disable host watchdog VV Timeout interval in hexadecimal format count for 0 1 second 01 0 1 second an
23. ad address 03 configuration returns output type O to 20 mA hexadecimal format output change immediate Command 03800 Receive Output address 03 value 0x800 210 mA returns successful Related Command Sec 2 1 YAANNTTCCFF Sec 2 2 AA2 Related Topics Sec 1 10 Configuration Tables Sec 5 5 Analog Output 36 CB 7021 CB 7022 CB 7024 User s Manual 2 8 SAAO Description Perform 4 mA Calibration Note The command is for CB 7021 21P only Syntax SAA0 CHK cr Delimiter character AA Address of setting module 00 to FF 0 command for performing 4 mA calibration Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 010 Receive 01 Perform address 01 4 mA calibration returns successful Related Command Sec 2 9 SAAL Sec 2 10 AA3VV Related Topics Sec 1 9 Calibration CB 7021 CB 7022 CB 7024 User s Manual 37 2 9 SAAI Description Perform 20 mA Calibration Note The command is for CB 7021 21P only Syntax SAA1 CHK cr Delimiter character AA Address of setting module 00 to FF 1 command for performing 20 mA calibration Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no response Delimiter for valid command Delimiter f
24. annel 2 output 0 0 returns successful Command 0142 Receive 01 Set address 01 channel 2 PowerOn Value returns successful The Power On Value of channel 2 is set to 0 0 now Related Command Sec 2 15 AAN Data Sec 2 21 AA7N Related Topics Sec 1 10 Configuration Tables Sec 3 5 Analog Output 50 CB 7021 CB 7022 CB 7024 User s Manual 2 20 AA6N Description Last Value of Channel N Readback Note The command is for CB 7022 and CB 7024 only Syntax SAA6N CHK cr Delimiter character AA Address of reading module 00 to FF 6 Command for reading last output command value N Channel to readback 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax or comm error may not get response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data Last output command value See Sec 1 9 for format Example for CB 7024 Command 013 10 000 Receive 01 Set address 01 channel 3 output 10 0 returns successful Command 0163 Receive 101 10 000 Read address 01 channel 3 last output command value re turns 10 000 Related Command Sec 2 15 AAN Data Sec 2 22 SAASN Related Topics Sec 3 7 Current Readback CB 7021 CB 7022 CB 7024 User s Manual 51 2 21 1 AA7N Description Perform 10V Calibration for Channel N Note The command is for CB 7022 only Syntax SAA7N CHK cr Delim
25. cription Read Safe Value of Channel N Note The command is for CB 7022 and CB 7024 only Command AA4N CHK cr Delimiter character AA Address of reading module 00 to FF 4 Command for reading Safe Value N Channel to read 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get a response Delimiter for valid command pi Delimiter for invalid command AA Address of response module 00 to FF Data Safe Value of module Refer Sec 1 10 for data format Example for CB 7024 Command 0140 Receive 01 00 000 Read address 01 channel 0 Safe Value returns 0 0 Related Command Sec 2 25 Sec 2 26 AAO Sec 2 27 AAT Sec 2 28 A A2 Sec 2 29 AA3EVV Sec 2 33 AASN Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation CB 7021 CB 7022 CB 7024 User s Manual 65 2 32 AAS Description Set Safe Value Note The command is for CB 7021 21P only Command AAS CHK cr Delimiter character AA Address of setting module 00 to FF 5 Command to store current output as Safe Value Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax or communication error may not get a response Delimiter for valid command P Delimiter for invalid command AA Address of response module 00 to FF Example Command 0100 000 Receive 01 Output address 01 value 0 0 retur
26. d FF 25 5 seconds Example Command 012 Receive O1OFF Read address 01 host watchdog timeout interval returns host watchdog disable and time interval is 25 5 seconds Related Command Sec 2 25 Sec 2 26 AANO Sec 2 27 AA1 Sec 2 29 AA3EVV Sec 2 30 AA4 Sec 2 31 AAAN Sec 2 32 AAS Sec 2 33 AASN Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation CB 7021 CB 7022 CB 7024 User s Manual 61 2 29 AAJEVV Description Set Host Watchdog Timeout Interval Command AA3EV V CHK cr Delimiter character AA Address of setting module 00 to FF 3 Command for setting host watchdog timeout value E Enable O Disable host watchdog VV Timeout interval from 01 to FF each for 0 1 second Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 010 Receive 0100 Read address 01 module status returns host watchdog timeout flag is clear and host watchdog is disabled Command 013164 Receive 01 Set address 01 host watchdog timeout interval 10 0 seconds and enable host watchdog returns successful Command 012 Receive 0164 Read address 01 host watchdog timeout interval returns 10 0 seconds Command Receive no response 62 CB 7021 CB 7022 CB 7024 User s Manual Res
27. e requirements for industrial process measurement and control equipment IEC 801 3 Radiated electromagnetic field requirements for in dustrial process measurements and control equipment IEC 801 4 Electrically fast transients for industrial process mea surement and control equipment Carl Haapaoja Director of Quality Assurance CB 7021 CB 7022 CB 7024 User s Manual 9 Measurement Computing Corporation 16 Commerce Blvd Middleboro MA 02346 508 946 5100 Fax 508 956 9500 E mail info Omeasurementcomputing com www measurementcomputing com 74 CB 7021 CB 7022 CB 7024 User s Manual
28. elimiter character AA Address of setting module 00 to FF 3 Command for trimming calibration N Channel to trim 0 to 1 for CB 7022 0 to 3 for CB 7024 VV 2 s complement hex to trim output value 00 to 5F to increase 0 to 95 counts and FF to Al to decrease 1 to 95 counts A count 4 88uA 2 44mV for CB 7022 and 2 44uA or 1 22mV for CB 7024 Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax or comm error may not get response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 01321F Receive 01 Trim address 01 channel 2 output 31 counts returns OK Related Command Sec 2 16 AAON Sec 2 17 AAIN Related Topics Sec 1 9 Calibration CB 7021 CB 7022 CB 7024 User s Manual 49 2 19 SAA4N Description Set PowerOn Value for Channel N Note The command is for CB 7022 and CB 7024 only Syntax SAA4N CHK cr Delimiter character AA Address of setting module 00 to FF 4 Command for setting PowerOn Value store the current output value as PowerOn Value N Channel to set 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example for CB 7024 Command 012 00 000 Receive gt Set address 01 ch
29. error may get no response Delimiter for valid command d Delimiter for invalid command AA Address of response module 00 to FF Example Command 0101 Receive 01 Perform Address 01 channel 1 calibration 4 mA for CB 7022 0 mA or 10 0V for CB 7024 returns successful Related Command Sec 2 17 AAIN Sec 2 18 SAA3NVV Related Topics Sec 1 9 Calibration CB 7021 CB 7022 CB 7024 User s Manual 47 2 17 SAAIN Description CB 7022 Perform 20 mA Calibration for Channel N CB 7024 Perform 20 mA 10V Calibration for Channel N Note The command is for CB 7022 and CB 7024 only Syntax SAAIN CHK cr Delimiter character AA Address of setting module 00 to FF 1 Command for perform 20 mA or 10V calibration N Channel to calibrate 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no response Delimiter for valid command j Delimiter for invalid command AA Address of response module 00 to FF Example Command 0112 Receive 01 Perform address 01 channel 1 calibration 20 mA for CB 7022 20 mA or 10 0V for CB 7024 returns successful Related Command Sec 2 16 AAON Sec 2 18 SAA3NVV Related Topics Sec 1 9 Calibration 48 CB 7021 CB 7022 CB 7024 User s Manual 2 18 SAA3NVV Description Trim Calibration for Channel N Note The command is for CB 7022 and CB 7024 only Syntax SAA3NVV CHK cr D
30. et the host watchdog timer Wait for about 10 seconds and don t send command the LED of module will go to flash Command 010 Receive 0104 Read address 01 module status returns host watchdog timeout flag is set and host watchdog is disabled Command 011 Receive 01 Reset address 01 module status returns successful Related Command Sec 2 25 Sec 2 26 A AO Sec 2 27 AAT Sec 2 26 AA2 Sec 2 30 AA4 Sec 2 31 AAAN Sec 2 32 AAS Sec 2 33 AASN Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation CB 7021 CB 7022 CB 7024 User s Manual 63 2 30 AA4 Description Read Safe Value Note The command is for CB 7021 21P only Command AA4 CHK cr Delimiter character AA Address of reading module 00 to FF 4 Command for read Safe Value Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get a response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data Safe Value of module Refer Sec 1 10 for data format Example Command 014 Receive 0105 000 Read address 01 Safe Value returns 5 0 Related Command Sec 2 25 Sec 2 26 AAO Sec 2 27 NA1 Sec 2 28 AA2 Sec 2 29 AA3EVV Sec 2 32 AA5 Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation 64 CB 7021 CB 7022 CB 7024 User s Manual 2 31 AA4N Des
31. iter character AA Address of reading module 00 to FF 7 command for performing 10V calibration N channel to calibrate 0 to 1 Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 0170 Receive 01 Perform address 01 channel O 10V calibration returns successful Related Command Sec 2 16 SAAON Sec 2 17 SAAIN Related Topics Sec 1 9 Calibration 52 CB 7021 CB 7022 CB 7024 User s Manual 2 21 2 AA7N Description Read PowerOn Value of Channel N Note The command is for CB 7024 only Syntax SAA7N CHK cr Delimiter character AA Address of reading module 00 to FF 7 Command for reading PowerOn Value N Channel to readback 0 to 3 Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may not get response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data Last output command value See Sec 1 9 for the format Example Command 0170 Receive 01 00 000 Read address 01 channel 0 PowerOn Value returns 10 0 Related Command Sec 2 19 SAA4N CB 7021 CB 7022 CB 7024 User s Manual 53 2 22 SAASN Description Current Value of Channel N Readback Note The command is for CB 7022 and
32. ns successful Command 015 Receive 01 Set address 01 Safe Value returns successful Related Command Sec 2 25 Sec 2 26 A A0 Sec 2 27 AAT Sec 2 26 AA2 Sec 2 29 AA3EVV Sec 2 30 AA4 Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation 66 CB 7021 CB 7022 CB 7024 User s Manual 2 33 AASN Description Set Safe Value of Channel N Note The command is for CB 7022 and CB 7024 only Command AASN CHK cr Delimiter character AA Address of setting module 00 to FF 5 Command to store current output as Safe Value N Channel to set 0 to 1 for CB 7022 0 to 3 for CB 7024 Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax or communication error may not get a response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example for CB 7024 Command 010 05 000 Receive 01 Output address 01 channel 0 value 45 0 returns successful Command 0150 Receive 01 Set address 01 channel 0 Safe Value returns successful Related Command Sec 2 25 Sec 2 26 A A0 Sec 2 27 AAT Sec 2 26 A A2 Sec 2 29 AA3EVV Sec 2 31 AAAN Related Topic Sec 3 2 Module Status Sec 3 3 Dual Watchdog Operation CB 7021 CB 7022 CB 7024 User s Manual 67 3 Application Note 3 1 INIT pin Operation Each CB 7000 module has a build in EEPROM to store configuration information such as address type baud rate
33. or invalid command AA Address of response module 00 to FF Example Command 011 Receive 01 Perform address 01 20 mA calibration returns successful Related Command Sec 2 8 SAAO Sec 2 10 AA3VV Related Topics Sec 1 9 Calibration 38 CB 7021 CB 7022 CB 7024 User s Manual 2 10 AA3VV Description Trim Calibration Note The command is for CB 7021 21P only Syntax AA3V V CHK cr Delimiter character AA Address of setting module 00 to FF 3 Command for trimming calibration VV 2 s complement hexadecimal to trim the analog output value 00 to 5F to increase O to 95 counts and FF to Al to decrease 1 to 95 counts Each count indicates 4 88uA or 2 44mV Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or comm error may get no response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 0131F Receive 01 Trim address 01 output to increase 31 counts returns successful Related Command Sec 2 8 SAAO Sec 2 9 AA 1 Sec 2 13 SAA7 Related Topics Sec 1 9 Calibration CB 7021 CB 7022 CB 7024 User s Manual 39 2 11 SAA4 Description Set PowerOn Value Note The command is for CB 7021 21P only Syntax SAA4 CHK cr Delimiter character AA Address of setting module 00 to FF 4 Command for setting PowerOn Value Store the current output value as PowerOn Value Response Valid Command AA CH
34. pics Sec 1 10 Configuration Tables Sec3 1 INIT pin Operation 30 CB 7021 CB 7022 CB 7024 User s Manual 2 3 SAAS Description Read Reset Status Command AAS CHK cr Delimiter character AA Address of reading module 00 to FF 5 Command for reading reset status Response Valid Command AAS CHK cr Invalid Command AA CHK cr Syntax or communication error may get no response Delimiter for valid command Delimiter for invalid command Address of response module 00 to FF Reset status 1 the module is been reset O the UN x 2 module is not been reset Example Command 015 Receive 011 Read address 01 reset status returns first read Command 015 Receive 010 Read address 01 reset status returns no reset occurred Related Topics Sec3 4 Reset Status CB 7021 CB 7022 CB 7024 User s Manual 2 2 4 SAAF Description Read Firmware Version Syntax SAAF CHK cr Delimiter character AA Address of reading module 00 to FF F command for reading firmware version Response Valid Command 1A A Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data firmware version of module Example Command 01F Receive 01A2 0 Read address 01 firmware version returns version A2 0 Command 02F Receive 01B1 1 Read addres
35. s 02 firmware version returns version B1 1 22 CB 7021 CB 7022 CB 7024 User s Manual 2 5 SAAM Description Read Module Name Syntax SAAM CHK cr Delimiter character AA Address of reading module 00 to FF M Command for reading module name Response Valid Command AA Data CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no re sponse Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Data Name of module Example Command 01M Receive 017021 Read address 01 module name returns name 7021 Command 03M Receive 037021P Read address 03 module name returns name 7021P Related Command Sec 2 6 AAO Data CB 7021 CB 7022 CB 7024 User s Manual 33 2 6 AAO Data Description Set Module Name Syntax AAO Data CHK cr Delimiter character AA Address of setting module 00 to FF O Command for setting module name Data New name for module max 6 characters Response Valid Command AA CHK cr Invalid Command AA CHK cr Syntax error or communication error may get no response Delimiter for valid command Delimiter for invalid command AA Address of response module 00 to FF Example Command 0107021 Receive 01 Set address 01 module name to 7021 returns successfulful Command 01M Receive 017021 Read address 01 module name returns 7021 Related Command Sec 2 5 SAAM 3A CB 7021 CB 7022
36. sful Command 016 Receive 0110 000 Read address 01 last output command value returns 10 000 Command 018 Receive 0101 000 Read address 01 current value returns 1 0V Command 018 Receive 0101 500 CB 7021 CB 7022 CB 7024 User s Manual 43 Read address 01 current value returns 1 5V Related Command Sec 2 7 tA A Data Sec 2 12 AA6 Related Topics Sec 3 6 Slew Rate Control Sec 3 7 Current Readback 44 CB 7021 CB 7022 CB 7024 User s Manual 2 15 AAN Data Description Output Analog Value for Channel N Note The command is for CB 7022 and CB 7024 only Syntax FAAN Data CHK cr Delimiter character AA Address of output module 00 to FE N Output channel 0 to 1 for CB 7022 0 to 3 for CB 7024 Data Analog output value reference Sec 1 10 for its format Response Valid Command gt CHK cr Invalid Command AA CHK cr Ignore Command CHK cr Syntax error or communication error may get no response gt Delimiter for valid command 2 Delimiter for invalid command When the Data is out of range and the output will go to the closest value in the module s range Delimiter for the module s host watchdog status is set and the output command will be ignored AA Address of response module 00 to FF Example for CB 7022 Command 012 Receive 1013F0600 Read address 01 configuration returns multichannel output 9600 bps and engineering unit format Command 0190 Receive 0110
37. the output to the desired value 2 PowerOn Value When the module is reset and or when the host watchdog timeout status is clear the module s output is set to predefined PowerOn Value 3 Output Command Value When the host watchdog timeout status is clear the user sends command AA Data or AAN Data to the module to change the output value The module will returns successful receive If user sets the output value over the maximum value of output range the output will go to maximum value and returns an out of range receive A A reply If the output value is under the minimum value of output range the output will go to minimum value and returns out of range receive A A 3 6 Slew Rate Control Slew rate control is used to adjust the output rate of change Most analog output changes are step changes In many applications this characteristic is undesirable A gradual output change under slew rate control is more appropriate YO CB 7021 CB 7022 CB 7024 User s Manual The CB 7021 21P 22 24 provides programmable slew rate control When an output command is sent to CB 7021 21P 22 24 to change the analog value the output automatically drives to the new value at the specified slew rate The CB 7021 21P 22 24 updates the analog output value at 100 conversions per second The programmed slew rate sets the value of each 10 ms step change Thus the output is smoothly stepped until the final output value 1s reached Refer to
38. ue The Host Watchdog is a software function to monitor the host s operating status Its purpose is to detect a network communication problem or a halted host If a timeout occurs the module will place all outputs to their Safe Value to prevent any problem in the controlled unit process The CB 7000 module with Dual Watchdog makes the control system more reliable and safer 3 4 Reset Status The Reset Status 1s set when the module is powered on or is reset by the Module Watchdog It is cleared when the command Read Reset Status SA A5 sent This is useful for user to determine the module s working status When Reset Status is set the module is reset the output is changed to the PowerOn Value When the Reset Status is clear the module is not reset the output is not changed 3 5 Analog Output The module s output have three different condition lt 1 gt Safe Value If the host watchdog times out the output CB 7021 CB 7022 CB 7024 User s Manual 69 is set to Safe Value When the module receives the output command such as FAA Data or FXAAN Data the module will returns ignore receive and will not change the output to the output command value The host watchdog timeout status is set and stored in EEPROM while the host watchdog timeout interval expired and can only be cleared by command AA1 If the user wants to change the output he must first clear the host watchdog timeout status then send an output command to change
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