10. TROUBLESHOOTING
IMS01T28-E4
10-5
Modbus
Problem Possible
cause
Solution
No response Wrong connection, no connection or
disconnection of the communication cable
Confirm the connection method or condition
and connect correctly
Breakage, wrong wiring, or imperfect contact
of the communication cable
Confirm the wiring or connector and repair
or replace the wrong one
Mismatch of the setting data of
communication speed and data bit
configuration with those of the host computer
Confirm the settings and set them correctly
Wrong
address
setting
There is length of query message exceeds set
range
A transmission error (overrun error, framing
error, parity error or CRC-16 error) is found in
the query message
Re-transmit after time-out occurs or verify
communication program
The time interval between adjacent data in the
query message is too long, exceeding 24 bit’s
time
Error code 1 Function cod error
(Specifying nonexistent function code)
Confirm the function code
Error code 2 When the mismatched address is specified
Confirm the address of holding register
Error code 3
When the specified number of data items in
the query message exceeds the maximum
number of data items available
When the data written exceeds the setting
range
Confirm the setting data
Error code 4 Self-diagnostic error
Turn off the power to the instrument. If the
same error occurs when the power is turned
back on, please contact RKC sales office or
the agent.
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Страница 245: ...The first edition SEP 2012 IMQ00 The fourth edition FEB 2019 IMQ00...