Rockwell Automation 4100 ALEC AXIS LINK ENCODER CONVERTER - Manual (Page 47)

Publication 4100-5.3 - June 1999
Fault Indication & Control Status 39
No Fault
A green AL LED indicates AxisLink is running properly. This is the
normal condition after power up and while the link is working.
CPU OK The CPU OK LED is provided on the front panel of the ALEC to
visually monitor the state of the microprocessor. This LED should
remain lit when under normal operation and goes out when the CPU
enters a fault condition.
Encoder OK LED The Encoder OK LED monitors the signal from the incremental
encoder connected to the ALEC. When the encoder is working
normally, the LED is lit. It goes out when the encoder signal is lost,
signifying an Encoder fault. If DIP switch 3, Encoder Fault, is in the
ON position, a loss of signal de-activates the Normally Open Fault
Relay.
Table 4.1 AL LED Status Indicators
AL LED Status Condition
RED AxisLink Fault At least 256 link errors -
AxisLink Shuts Down
FLASHING RED/
GREEN AxisLink Failing At least 96 link errors -
AxisLink is in danger of
faulting.
GREEN System OK Normal State
IMPORTANT
The Encoder OK LED is not latched. This means that
LED does not have to be released either mechanically or
electrically before it restarts reporting the current state of
the Encoder.