Verifying proper power-up of the cmm321, Problems during power-up – GE GFK-1541B User Manual
Page 25
2-12
TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual
–
May 2002
GFK-1541B
2
Verifying Proper Power-Up of the CMM321
Powering-up the Ethernet Interface
After configuring the CMM321, follow the procedure below to be sure it 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 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
OK
ON
LAN
ON or blinking
FDX
ON Solid if Full Duplex mode is active OFF
if Full Duplex mode is not active
STAT
ON
If STAT 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 CMM321 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 diagram and table for suggestions.