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5.2 Supported function coses and exception codes
Function code
Explain
03
Read Holding Registers
Number of continuous read registers per pass ≤20
06
Write Single Register
16
Write multiple registers
Number of continuous read registers per pass ≤20
Exception code specification
Exception
code
MODBUS name
Remarks
01
illegal function code Function code not supported by wired
controller
02
illegal data address The address sent in query or setting is
undefined in the wired controller
03
illegal data values
The set parameter is an illegal value,
which exceeds the reasonable set range
If 138 address of Modbus control switch is not written as "1", all but 138
addresses can not be written.
Summary of Contents for KJRM-120H2/BMWKO-E
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