Command telegram
Slave address
Function code
Address 1. bit
Number of words
Check sum
CRC/LRC
1byte
1byte
1word
1word
1word
Respond telegram
Slave address Function code
Number of
read bytes
Data 1. word
Data 2. word
...
Check sum
CRC/LRC
1byte
1byte
1byte
1word
1word
1word
max. 125words
Code 05h: Write 1 bit to master output area 0x
A status change is via "Status bit" with following values:
"Status bit" = 0000h
®
Bit = 0
"Status bit" = FF00h
®
Bit = 1
Command telegram
Slave address
Function code
Address bit
Status bit
Check sum
CRC/LRC
1byte
1byte
1word
1word
1word
Respond telegram
Slave address
Function code
Address bit
Status bit
Check sum
CRC/LRC
1byte
1byte
1word
1word
1word
Code 06h: Write 1 word to master output area 4x
Command telegram
Slave address
Function code
Address word
Value word
Check sum
CRC/LRC
1byte
1byte
1word
1word
1word
Respond telegram
Slave address
Function code
Address word
Value word
Check sum
CRC/LRC
1byte
1byte
1word
1word
1word
Code 0Fh: Write n bits to master output area 0x
Write 1 bit 05h
Write 1 word 06h
Write n bits 0Fh
VIPA System MICRO
Option: PtP communication
Modbus - Function codes
HB400 | CPU | M13-CCF0000 | en | 16-47
167