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Appendix F
Appendix F How to use the Checksum feature F-
3
Example 2
This example explains how to calculate the checksum value of a Read
High alarm limit command string:
Case 1. (If the Checksum feature is
disabled
)
Command:
$07RH(cr)
Response:
!07+2.0500(cr) when the command is valid.
Case 2. (If the Checksum feature is
enabled
)
Command:
$07RH25(cr)
Response:
!07+2.0500D8(cr)
where:
25 represents the checksum of this command, and
D8 represents the checksum of the response.
The checksum of the command string is derived as shown below:
25h = (24h+ 30h + 37h + 52h + 48h) MOD 100h
The hexadecimal ASCII codes for $, 0, 7, R, H are 24h, 30h, 37h, 52h
and 48h respectively. The sum of these ASCII codes is 125h, and the
result equals to 25h after modulus-256(100h) execution.
Summary of Contents for Data Acquisition Modules ADAM 4000
Page 1: ...ADAM 4000 Data Acquisition Modules User s Manual ...
Page 7: ...Introduction 1 ...
Page 11: ...Installation Guideline 2 ...
Page 28: ...I O Modules 3 ...
Page 98: ...Chapter 3 Chapter 3 I O Modules 3 71 Figure 3 69 ADAM 4069 Form A Relay Output ...
Page 104: ...Command Set 4 ...
Page 147: ...Analog Input Module Command Set 5 ...
Page 215: ...Analog Output Module Command Set 6 ...
Page 236: ...Digital I O Relay ouput and Counter Frequency Command Set 7 ...
Page 313: ...Calibration 8 ...
Page 329: ...Technical Specifications A ...
Page 335: ...Appendix A Appendix A Technical Specification A 7 Figure A 2 ADAM 4011D Function Diagram ...
Page 337: ...Appendix A Appendix A Technical Specification A 9 Figure A 3 ADAM 4012 Function Diagram ...
Page 339: ...Appendix A Appendix A Technical Specification A 11 Figure A 4 ADAM 4013 Function Diagram ...
Page 341: ...Appendix A Appendix A Technical Specification A 13 Figure A 5 ADAM 4016 Function Diagram ...
Page 343: ...Appendix A Appendix A Technical Specification A 15 Figure A 6 ADAM 4017 4017 Function Diagram ...
Page 349: ...Appendix A Appendix A Technical Specification A 21 Figure A 8 ADAM 4018M Function Diagram ...
Page 351: ...Appendix A Appendix A Technical Specification A 23 Figure A 9 ADAM 4019 Function Diagram ...
Page 355: ...Appendix A Appendix A Technical Specification A 27 Figure A 11 ADAM 4024 Function Diagram ...
Page 357: ...Appendix A Appendix A Technical Specification A 29 Figure A 12 ADAM 4050 Function Diagram ...
Page 377: ...Data Formats and I O Ranges B ...
Page 389: ...Technical Diagrams C ...
Page 392: ...Technical Diagrams C 4 ADAM 4000 Series User s Manual Figure C 3 DIN Rail Mounting ...
Page 394: ...Technical Diagrams C 6 ADAM 4000 Series User s Manual Figure C 5 Panel Mounting ...
Page 395: ...Appendix C Appendix C Technical Diagrams C 7 C 2 3 Piggyback Stack Figure C 6 Piggyback Stack ...
Page 396: ...Utility Software D ...
Page 404: ...RS 485 Network E ...
Page 411: ...How to use the Checksum feature F ...
Page 415: ...ADAM 4000 I O Modbus Mapping Table G ...
Page 428: ...Changing Configuration to Modbus Protocol H ...