Troubleshooting By Symptom - Mitsubishi Electric NZ2GN2B1-32D User Manual

11.4

Troubleshooting by Symptom

Perform troubleshooting by symptom when the I/O module does not operate properly even with no error. If an error occurs in
the I/O module, identify the cause of the error using the engineering tool.
When the ON/OFF status of an external input cannot be read
When the ON/OFF status of an external input cannot be read, check the following items.
Check item
Is the corresponding LED (X0 LED to X1F LED)
of the I/O module on when an external input
device is on?
When the LEDs from X0 LED to X1F LED are
turned on, does the corresponding RX device
turn on?
Is there any problem with other equipment such
as the master/local module and connected
devices?
When the ON/OFF status of an external output cannot be changed
When the ON/OFF status of an external output cannot be changed, check the following items.
Check item
When External output signal (RY0 to RY1F) is
turned on, is the corresponding LED (Y0 LED to
Y1F LED) of the I/O module turned on?
Are signals output from the output terminal Y on
which the LED (Y0 LED to Y1F LED) is on?
Is there any problem with other equipment such
as the master/local module and connected
devices?
When CC-Link IE TSN/CC-Link IE Field diagnostics cannot be performed
When CC-Link IE TSN/CC-Link IE Field diagnostics cannot be performed, check the following items.
Check item
Is the version of the engineering tool supported?
Action
If the LED does not turn on, there is a problem on the input wiring.
Check the wiring confirming that the input wiring is not disconnected or short-circuited, or the voltage of the
input signal is correct.
For the rated input voltage, check the "Rated input voltage" column of each I/O module specifications.
Page 17 Input module
Page 35 I/O combined module
Refer to the following as well.
Page 96 Troubleshooting for input circuit
If the LED does not turn on even after the input wiring is corrected, the possible cause is an I/O module
failure. Please consult your local Mitsubishi representative.
If the RX device does not turn on, check and correct the refresh parameter so that the refresh device setting
matches the corresponding setting in the program. For the refresh parameter setting, refer to the following.
 MELSEC iQ-R CC-Link IE TSN User's Manual (Application)
If there is no problem with other equipment, the possible cause is an I/O module failure. Please consult
your local Mitsubishi representative.
Action
If the above LED is not turned on, check and correct the refresh parameter so that the refresh device
setting matches the corresponding setting in the program. For the refresh parameter setting, refer to the
following.
 MELSEC iQ-R CC-Link IE TSN User's Manual (Application)
If signals are not output, there is a problem with the output wiring.
Check the wiring confirming that the output wiring is not disconnected or short-circuited.
Refer to the following as well.
Page 99 Troubleshooting for output circuit
If there is no problem with other equipment, the possible cause is an I/O module failure. Please consult
your local Mitsubishi representative.
Action
Check the version of the engineering tool, and if it is prior to the compatible versions, update it.
11 TROUBLESHOOTING
11.4 Troubleshooting by Symptom
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