Modbus Rtu Response Format - Panasonic FP0H User Manual
Programmable controller
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10.7.2 MODBUS RTU Response Format
Response in normal status
• The same message as a command is returned for a single write command or for a loop back
test.
• A part of a command message (6 bytes from the beginning) is returned for multiple write
command.
Response in abnormal status
In case a parameter disabled to be processed is found in a command (except transmission
error)
Slave address (Unit No.)
Function code + 80H
Error code
CRC
Error code contents
1. Function code error
2. Device No. error (outside the range)
3. Device quantity error (outside the range)
1, 2, or 3
10.7 MODBUS RTU Format
10-29
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