GE GFK-1541B manual Verifying Proper Power-Up of the CMM742, Ethernet Interface Online

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Verifying Proper Power-Up of the CMM742

After configuring the Interface, follow the procedure below to verify that the Ethernet Interface is operating correctly.

1.Turn power OFF to the PLC for 3–5 seconds, then turn the power back ON. This will initiate a series of diagnostic tests.

The MODULE OK LED will blink indicating the progress of power-up.

2.The LEDs will have the following pattern upon successful power-up. At this time the Ethernet Interface is fully operational and on-line.

LED	Ethernet Interface Online
MODULE OK	●	(ON)
LAN ONLINE	●/✲ (ON/Traffic)
SERIAL ACTIVE	❍	(OFF)
STATUS	●	(ON)

If the STATUS LED is OFF, check the PLC Fault Table. Alternatively, use the Station Manager LOG command as explained in GFK-1186, TCP/IP Ethernet Communications for the Series 90 PLC Station Manager Manual.

Problems During Power-up

If a problem is detected during power-up, the Ethernet Interface may not transition directly to the Operational state. If the Interface does not transition to Operational, check the LED pattern on the Interface and refer to the following chart and table for corrective action.

GFK-1541B Chapter 2 Installation 2-51