User manual
Product Description
30
33002479 06 07/2008
LED Description The following table shows the description for the LED indicators of the different High 
End CPU modules.
LEDs Indication
Standard Processors 
140 CPU 65* *0 / 140 CPU 651 60S
Hot StandBy Processors 
140 CPU 671 60 / 140 CPU 671 60S
COM 
(yellow)
Controlled by the Coprocessor 
hardware
z Indicates Ethernet activity
Controlled by the Coprocessor hardware
z Indicates Primary or Standby activity
STS 
(yellow)
Controlled by the Coprocessor 
software
Controlled by the Coprocessor firmware
z Blinking: system is redundant and 
data are exchanged from the Primary 
to Standby controller
z ON: system not redundant / Copro 
booting from power-on to end of self-
tests
z OFF: Copro auto tests were not 
successfull
ON Normal
OFF Copro auto tests 
unsuccessful. Possible 
hardware problem.
Flashing:
1 Flash Configuration in 
progress. 
 Temporary situation.
2 Flashes Invalid MAC address
3 Flashes Link not connected
4 Flashes Duplicate IP Address. 
Module is set to its 
default IP address.
5 Flashes Waiting for IP address 
from address server
7 Flashes Firmware 
incompatibility 
between PLC OS and 
Copro firmware
Note: 6-flash signal is not used.










