Troubleshooting By Symptom - Mitsubishi Electric NZ2GN2S1-16D 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 the inter-module synchronous interrupt
program created when the CC-Link IE TSN
Network synchronous communication function is
used?
When the CC-Link IE TSN Network synchronous
communication function is used, does the master
station used support that function?
Has "Network Synchronous Communication" of
the network configuration setting or the CC-Link
IE TSN Network synchronous communication
setting been changed, to use the synchronization
cycle timing control mode or the set time
synchronization control mode?
Is there any problem with other equipment such
as the master station and connected devices?
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 22 Input module
Page 80 I/O combined module
Refer to the following as well.
Page 201 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.
User's manual for the master station used
Create the inter-module synchronous interrupt program when the CC-Link IE TSN Network synchronous
communication function is used.
User's manual for the master station used
When using the CC-Link IE TSN Network synchronous communication function, use the master station that
supports the function. To check the master station supporting the function, refer to the following.
Page 157 Applicable version
When using the synchronization cycle timing control mode or the set time synchronization control mode
(CC-Link IE TSN Network synchronous communication function), perform the following.
• Set "Network Synchronous Communication" to "Synchronous".
• Check and correct the CC-Link IE TSN Network synchronous communication setting.
Power off and on the module power supply or perform remote reset after changing the CC-Link IE TSN
Network synchronous communication setting.
If there is no problem with other equipment, the possible cause is a failure of the I/O module or waterproof
I/O module. Please consult your local Mitsubishi representative.
11 TROUBLESHOOTING
11.4 Troubleshooting by Symptom
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