Download CC-Link IE Field Network Digital-Analog

CHAPTER 11 TROUBLESHOOTING
(7) When the L ER LED turns on
Check item
Action
• Check if 1000BASE-T-compliant Ethernet cables are used.
Are Ethernet cables normal?
(
User's manual for the master/local module used)
• Check if the station-to-station distance is 100m or less.
11
• Check if the Ethernet cables are not disconnected.
• Check if a 1000BASE-T-compliant switching hub is used.
Does the switching hub normally operate?
(
User's manual for the master/local module used)
• Check if the power supply of the switching hub is turned on.
Do other stations connected to the D/A converter module
normally operate?
Is the mode of the module on the master station set to
Online?
Is there any noise affecting the system?
Check if the power supplies of the other stations are turned on.
Change the mode of the module to Online.
Check the wiring condition of the Ethernet cables.
When the loopback function is enabled, check if the ring topology is
Is the loopback function enabled for the master station?
correctly configured for the port where the L ER LED is on.
(
User's manual for the master/local module used)
(8) When the LINK LED turns off
Check item
Action
• Check if 1000BASE-T-compliant Ethernet cables are used.
Are Ethernet cables normal?
(
User's manual for the master/local module used)
• Check if the station-to-station distance is 100m or less.
Do the switching hub and other stations normally operate?
Check if the power supplies of the switching hub and other stations are
turned on.
(9) When the ERR. LED turns on
Check item
Action
Identify the error cause of the D/A converter module and take corrective
Does any error occur?
action with GX Works2.
(10)When the ALM LED turns on
Check item
Is any alert output?
Action
Check Alert output flag (RWrA).
147
11.4 Checking the LEDs
• Check if the Ethernet cables are not disconnected.