3, 8, or 16 Axis SERCOS interface Module 19
Publication
1756-IN572E-EN-P – March 2004
SERCOS Communication Phase Status Using the CP Indicator
Module Status Using the OK Indicator
If the CP LED displays: Then the module status is:
Solid Orange In Phase -1: Autobaud detection in progress.
OFF In Phase 0: looking for a closed ring.
Flashing Red In Phase 1: looking for active nodes.
Alternating Red/Green In Phase 2: configuring nodes for communication.
Flashing Green In Phase 3: configuring device specific parameters
Solid Green In Phase 4: configured and active.
If the OK LED
displays:
Then the module status is: Take this action:
Off The module is not operating. • Apply chassis power.
• Verify the module is
completely inserted into
the chassis and
backplane.
Flashing green The module has passed internal
diagnostics, but has not
established active
communications.
None, if you have not configured
the module.
Solid green • Data is being exchanged.
• The module is in the
normal operating state.
None. The module is ready for
action.
Flashing red • A major recoverable
failure has occurred.
• An NVS update is in
progress.
If an NVS update is in progress,
complete the NVS update.
If an NVS update is not in
progress: Reboot
Solid red A potential nonrecoverable fault
has occurred.
• Reboot the module.
• If the solid red persists,
replace the module.
Allen-Bradley PLCs
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