226
(6) When the L ER LED turns on
(7) When the LINK LED turns off
(8) When the ERR. LED flashes/turns on
Check item
Action
Are Ethernet cables normal?
• 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.
Does the switching hub in the system normally operate?
• 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.
Do other stations connected to the high-speed counter
module normally operate?
Check that the power supplies of the other stations are turned on.
Is the mode of the module on the master station set to other
than Online?
Change the mode of the module to Online.
Is there any noise affecting the system?
Check the wiring condition of the Ethernet cables.
Is the loopback function enabled for the master station?
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)
Check item
Action
Are Ethernet cables normal?
• 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.
Do the switching hub and other stations in the system
normally operate?
• 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.
Check item
Action
Does any error occur?
Identify the error cause of the high-speed counter module and take
corrective action with GX Works2.
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