SSI Servo Module
15
Publication
1756-IN595A-EN-P - March 2004
The table below provides an explanation of the OK indicator.
If the OK LED
displays:
The module status is:
Take this action:
Off
The module is not operating.
•
Apply chassis power.
•
Verify the module is completely
inserted in chassis and
backplane.
Flashing green
light
The module has passed
internal diagnostics, but it is
not communicating axis
data over the backplane.
•
None, if you have not
configured the module.
•
If you have configured the
module, check the slot number
in the 1756-M02AS Properties
dialog box.
Steady green
light
One of the following:
•
Module is
exchanging axis
data.
•
The module is in
the normal
operating state.
None
Flashing red
light
One of the following:
•
A major
recoverable failure
has occurred.
•
A communication
fault, timer fault,
or non-volatile
memory storage
(NVS) update is in
progress.
•
The OK contact
has opened.
If an NVS update is in progress,
complete the NVS update.
If an NVS update is not in progress:
•
Check the Servo Fault word for
the source of the error.
•
Clear the servo fault condition
via Motion Axis Fault Reset
instruction.
•
Resume normal operation.
•
If the flashing persists,
reconfigure the module.
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