Rockwell Automation Publication MOTION-RM003I-EN-P - February 2018 301
Bit Alarm Name Device Node Alarm
Name
Description
0 Control Sync Alarm -
The Control Sync Alarm bit attribute is set when the
Logix controller detects that several consecutive
connection updates from the motion module have
been missed.
1 Module Sync Alarm
Control Connection
Update Alarm
The Module Sync Alarm bit attribute is set when
the motion module detects that several consecutive
connection updates in a row from the Logix
processor module have been missed or that an
update has been excessively late as determined by
the Controller Update Delay Low Limit attribute
value. This bit is cleared after 10 seconds without
another alarm condition.
2 Timer Event Alarm -
The Timer Event Alarm bit attribute is set when the
associated motion module has detected a problem
with the module's timer event functionality used to
synchronize the motion module's control loops. The
Timer Event Alarm bit can only be cleared by
reconfiguration or power cycle of the motion
module.
3 Processor Overload Alarm
Processor Overload
Alarm
The Processor Overload Alarm bit indicates that the
host processor associated with motion device is
experiencing overload conditions that could
eventually lead to a fault.
4 Clock Jitter Alarm Clock Jitter Alarm
Clock Jitter Alarm bit indicates that the Sync
Variance has exceeded the Sync Threshold while
the motion device is running in Sync Mode.
5 Out of Range Alarm -
The Out of Range Alarm indicates that the motion
device has detected that a Cyclic Write attribute
value has exceeded its allowed range.
6 Clock Skew Alarm Clock Skew Alarm
Clock Skew Alarm bit indicates that the motion
device has detected significant difference between
the device's System Time and the controller's
System Time that is preventing the device from
switching to synchronous operation.
7 Clock Sync Alarm Clock Sync Alarm
The Clock Sync Alarm bit indicates that the motion
device's local clock has lost synchronization with
the master clock for a short period of time (such as
10 to 20 seconds) during synchronous operation.
This alarm condition can also occur when a change
in the master clock source has been detected. The
Clock Sync Alarm is an indication that the local
IEEE-1588 clock has shifted back to its start-up
mode to quickly synchronize into the master clock.
8 Node Address Alarm Node Address Alarm
The Node Address Alarm bit
Address setting of the device has been changed
during motion device operation and may no longer
be valid.
19-31 Reserved -
See also
Exceptions on page 41
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