Mitsubishi Electric NZ2GFSS2 32D S1 User Manual page 127

When the I/O LED flashes
Check item
Has any error related to safety I/O occurred when
"I/O LED indication at error occurrence" is set to
"1: Indication of error point"? (Only for the
NZ2GFSS2-8D-S1, NZ2GFSS2-8TE-S1, or
NZ2GFSS2-16DTE-S1)
When the SAFETY LED turns off
Check item
Have parameters been set to the safety remote I/O
module?
Has the safety communication setting been
configured?
Has the safety station interlock of the CPU module
been canceled?
Has the safety module validation been performed?
Has any error occurred?
When the L ER LED turns on
Check item
Are Ethernet cables normal?
Is the switching hub in the system normally
operating?
Are other stations connected to the safety remote
I/O module normally operating?
Is the mode of a module on the master station set
to other than Online?
Is there any noise affecting the system?
Is the loopback function set to be enabled in the
master station?
When the LINK LED turns off
*1
Check item
Are Ethernet cables normal?
Are the switching hub and other stations in the
system normally operating?
*1 If link-up processing is repeated due to a condition of a device on the line, it may take a longer time for the LINK LED to turn on. This
phenomenon may be eliminated by changing the module PORT into which the Ethernet cable is connected (example: PORT1 
PORT2). For the wiring of Ethernet cable, refer to the following.
Page 60 Wiring of Ethernet cable
Action
Identify the error factor of the safety remote I/O module with the engineering tool and take corrective
actions. ( Page 132 How to Check Error Codes)
Action
Set parameters to the safety remote I/O module. ( Page 72 Parameter Settings)
Configure the safety communication setting. After configuring the setting, perform "Write to PLC". (
MELSEC iQ-R CC-Link IE Field Network User's Manual (Application))
Fully check wiring and connection, and cancel the safety station interlock of the CPU module. (
MELSEC iQ-R CPU Module User's Manual (Application))
Perform the safety module validation using the engineering tool. ( Page 72 Parameter Settings)
Identify the error factor with the engineering tool and take corrective actions.
Action
• Check that 1000BASE-T-compliant Ethernet cables are used. ( MELSEC iQ-R Ethernet/CC-Link IE
User's Manual (Startup))
• Check that the station-to-station distance is 100m or less.
• Check that the Ethernet cables are not disconnected.
• Check that a 1000BASE-T-compliant switching hub is used. ( MELSEC iQ-R Ethernet/CC-Link IE
User's Manual (Startup))
• Check that the power supply of the switching hub is turned on.
Check that the power supplies of the other stations are turned on.
Change the mode of the module to Online.
Check the status of wiring.
When the loopback function is enabled, check that the ring topology is correctly configured for the PORT
where the L ER LED is on. ( MELSEC iQ-R CC-Link IE Field Network User's Manual (Application))
Action
• Check that 1000BASE-T-compliant Ethernet cables are used. ( MELSEC iQ-R Ethernet/CC-Link IE
User's Manual (Startup))
• Check that the station-to-station distance is 100m or less.
• Check that the Ethernet cables are not disconnected.
• Check that a 1000BASE-T-compliant switching hub is used. ( MELSEC iQ-R Ethernet/CC-Link IE
User's Manual (Startup))
• Check that the power supplies of the switching hub and other stations are turned on.
10 TROUBLESHOOTING
125
10.2 Checking the LEDs
10