Mitsubishi Electric NZ2GF2S-60IOLD8 User Manual page 125

When the L ER LED turns on
Check item
Are Ethernet cables normal?
Does the switching hub in the system normally operate?
Do other stations connected to the IO-Link module normally operate?
Is there any noise affecting the system?
Is the loopback function enabled for the master station?
*1 When an IO-Link module is installed in a control panel, the control panel is electrically connected to the FG terminal of the module via
the DIN rail.
Therefore, if the control panel is not grounded, noise may go into the FG terminal from the control panel via the DIN rail.
When the LINK LED is off
Check item
Are Ethernet cables normal?
Do the switching hub and other stations in the system normally operate?
Are the statuses of the fast link-up functions of the modules connected to each
other the same (enabled or disabled)?
For the modules to be connected to each other with the fast link-up function
being enabled, are PORT1 and PORT2 connected with a cable?
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 symptom may be eliminated by connecting the Ethernet cable to a different module PORT. (example:
PORT1  PORT2)
When CH1 to CH8 ERR. LEDs turn on
Check item
Has any error occurred?
Action
• Check that 1000BASE-T-compliant Ethernet cables are used. ( User's
manual for the master/local module used)
• 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. ( User's
manual for the master/local module used)
• Check that the power supply of the switching hub is turned on.
Check that the power supplies of the stations are on.
Check the status of wiring.
Ground the control panel with the module installed in it.
When the loopback function is enabled, check that the ring topology is
correctly configured for the PORT where the L ER LED is on. ( User's
manual for the master/local module used)
Action
• Check that 1000BASE-T-compliant Ethernet cables are used. ( User's
manual for the master/local module used)
• 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. ( User's
manual for the master/local module used)
• Check that the power supplies of the switching hub and other stations are
turned on.
For the ports connected to each other, set the same state (enable/disable) for
the fast link-up function. And then power off and on the modules. In addition,
disable the fast link-up function for the port that is to be connected to the port
where the fast link-up function is not supported.
Connect PORT1 and PORT2 with a cable when connecting modules where
the fast link-up function is enabled.
Action
Identify the error factor of the IO-Link module with the engineering tool to take
the corrective action. ( Page 129 Checking for the Error Codes and the
Warning Codes)
*1
11 TROUBLESHOOTING
123
11.1 Checking the LEDs
11