Mitsubishi Electric MELSEC iQ-RX40NC6B Application User's Manual page 201

When "Timeout" is displayed for "Module Status"
Check the following items in order of No.
No. Check item
1 Check whether LEDs of the I/O module with diagnostic functions are
in the following states.
• The ERR LED is flashing.
• The S MODE LED is flashing (1s cycle).
2 Check whether the safety module operation was performed with the
personal computer connected to the SIL2 Process CPU in the
standby system.
3 Check whether the S MODE LED of the I/O module with diagnostic
functions is off.
If the safety module operation is performed while communications with the I/O module with diagnostic
functions are disabled, the time taken until "Timeout" is displayed for "Module Status" is set time in "Check at
Communication Time" (second)  3. (The default value for "Check at Communication Time" is 30 seconds.)
For details on "Check at Communication Time", refer to the GX Works3 Operating Manual.
When "Enabling Failed (Module Error)" is displayed for "Module Status"
Check item
Check whether "Enabling Failed (Module Error)" is displayed for "Module
Status".
When "Enabling Failed (Data Error)" is displayed for "Module Status"
Check item
Check whether measures have been properly taken against noise.
When "" is displayed for "Module Status"
Check the following items in order of No.
No. Check item
1 Check whether the I/O module with diagnostic functions is mounted
properly.
2 Check whether there are no problems on connections from the
personal computer where GX Works3 is installed to the remote head
module.
3 Check whether there are no problems on the power supply of the
remote head module.
Action
A moderate error occurred in the I/O module with diagnostic functions. The
safety module operation cannot be performed for the I/O module with
diagnostic functions with a moderate error. Check the error code in the
"Module Diagnostics" window and take the action described in the list of error
codes.
Page 200 List of Error Codes
If the CPU redundant system with remote I/O modules is configured based on
a redundant line, the safety module operation cannot be performed from the
SIL2 Process CPU in the standby system. Perform the safety module
operation again from the personal computer on which GX Works3 is open and
to which the SIL2 Process CPU in the control system is connected.
• Check that the firmware version of the I/O module with diagnostic functions
is 02 or later.
• The I/O module with diagnostic functions is set to normal mode. Set the
parameters for SIL2 mode by following the steps below again starting from
"Setting parameters on the remote head module side".
Page 131 Procedure on the remote head module side
Action
If this symptom persists even after the module is attempted to be enabled
again, please consult your local Mitsubishi representative.
Action
If measures to reduce noise do not eliminate this symptom, the possible
cause is a module failure. Please consult your local Mitsubishi representative.
Action
Check that the I/O module with diagnostic functions is mounted properly.
Review "Specify Connection Destination".
Check the power supply module.
13.4 Troubleshooting While Proceeding Procedures Before Operation
13 TROUBLESHOOTING
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