Vicruns 2S-0.4G-B, User Manual

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Chapter 10 Appendix
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Command command (CMD) and data description (DATA)
Command code: 03H, read N words (Word), can read up to 12 words and N=1 ～ 12. The
specific format is as follows:
Host read command frame
Frame header Slave address
Read command
code 0×03
Function code
address H...L
Number of read
function codes (h)
H...L
CRC check
L...H
Finish
Calculate CRC check
≥ 3 . 5 Character 1 Byte 1 Byte 2 Byte 2 Byte 2 Byte
Slave read response frame
Frame header Slave address
Read command
code 0×03
Number of data
bytes (2n)
Function code
parameters H...L
CRC check
L...H
Finish
Calculate CRC check
≥ 3 . 5 Character 1 Byte 1 Byte 1 Byte 2 Byte 2 Byte
Host write command frame
Frame header Slave address
Write command
code 0×06
Function code
parameters H...L
Function code
setting value
H...L
CRC check
L...H
Finish
Calculate CRC check
≥ 3 . 5 Character 1 Byte 1 Byte 2 Byte 2 Byte 2 Byte
Slave write response frame
Frame header Slave address
Write command
code 0×06
Function code
parameters H...L
Function code
setting value
H...L
CRC check
L...H
Finish
Calculate CRC check
≥ 3 . 5 Character 1 Byte 1 Byte 2 Byte 2 Byte 2 Byte
If the slave detects a communication frame error, or fails to read and write due to other reas -
ons, it will reply with an error frame. Slave read response error frame:
C
h
a
p
te
r
1
0