Omron KM50 Communications Manual page 101

Section 4 Modbus Communications Protocol
• Response Codes
Function code
83 hex
03 hex
● Example Command and Response
The following example is for reading Instantaneous Voltage 1.
(In this case, the slave address is 01 hex.)
Command:
Response:
4-8
Error
Error name
code
02 hex
Variable The read start variable address is incorrect.
address error
The variable area number is incorrect.
The address in the variable area is out of
range.
03 hex
The number of elements exceeds the
Variable data
specified range.
error
The range is 0002 to 0014 hex (2 to 20).
04 hex
The command could not be accepted
Operation error
because of communications area conditions.
−
Normal
No errors were detected.
completion
01 03 00 00 00 02
01 03 04 00 00 09 60
Cause
C4 0B (CRC-16)
FC 4B (CRC-16)