Chapter 8 RS485 communication
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This agreement is not used 0 x08 function code, so the subordinate standing response:
8-3-2. Illegal data address 02
Master query message format:
5200 04 function code register address error, so the sub station response:
8-3-3.Illegal data values 03
The main inquiry message format:
Function code register address errors, so the child standing response:
8-4.Using the matters need attention
1.Soft start device address, communication rate, calibration model must be the same with the
controller communication Settings.
2.If not receive response data, should check the above parameters, to 485 terminal connection
is correct, check CRC is correct or not.
3.When several soft starter communicate, should add 120 ohm resistor in the last soft starter's
“485+”and “485-” terminal.
4.The P5, P6, PL, PM and PN can't read and write operations through communication.
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