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DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming
4.3.2 CMD (Command code) and DATA
The content of access data depends on the command code. For descriptions of available command
codes, please refer to 4.2.2 in this chapter.
Example: read consecutive 8 words from address 0614H~H61B (T20~T27) of PLC Slave ID#1.
PCPLC
“ 01 03 06 14 00 08 04 80”
Sent message:
Field Name Example (Hex)
START
No data input 10 ms
Slave Address 01
Command code 03
06
Starting Address
14
00
Number of Points
08
CRC CHK Low 04
CRC CHK High 80
END
No data input 10 ms
PLCPC
“ 01 03 10 00 01 00 02 00 03 00 04 00 05 00 06 00 07 00 08 72 98”
Feedback message:
Field Name Example (Hex)
START
No data input 10 ms
Slave Address 01
Command code 03
Bytes Count 10
Data Hi (T20) 00
Data Lo (T20) 01
Data Hi (T21) 00
Data Lo (T21) 02
Data Hi (T22) 00
Data Lo (T22) 03
Data Hi (T23) 00
Data Lo (T23) 04
Data Hi (T24) 00
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