Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual - Manual (Page 374)

Publication 1784-UM003A-EN-P – June 2003
366 Motion Object Attributes
Control Sync Fault
The Control Sync Fault bit attribute is set when the Logix controller detects
that several position update messages in a row from the motion module have
been missed due to a failure of the synchronous communications connection.
This condition results in the automatic shutdown of the associated servo
module. The Logix controller is designed to “ride-through” a maximum of
four missed position updates without issuing a fault or adversely affecting
motion in progress. Missing more than four position updates in a row
constitutes a problematic condition that warrants shutdown of the servo
module. The Synchronous Connection Fault bit is cleared when the
connection is reestablished.
Module Sync Fault
The Module Sync Fault bit attribute is set when the motion module detects
that several position update messages in a row from the ControlLogix
processor module have been missed due to a failure of the synchronous
communications connection. This condition results in the automatic shutdown
of the servo module. The servo module is designed to “ride-through” a
maximum of four missed position updates without issuing a fault or adversely
affecting motion in progress. Missing more than four position updates in a row
constitutes a problematic condition that warrants shutdown of the servo
module. The Synchronous Connection Fault bit is cleared when the
connection is reestablished.
Timer Event Fault
If the Timer Event Fault bit attribute is set it indicates that the associated servo
module has detected a problem with the module’s timer event functionality
used to synchronize the motion module’s servo loop to the master timebase of
the Logix rack (i.e., Coordinated System Time). The Timer Event Fault bit can
only be cleared by reconfiguration of the motion module.
Module Hardware Fault
If the Module Hardware Fault bit attribute is set it indicates that the associated
servo module has detected a hardware problem that, in general, is going to
require replacement of the module to correct.
SERCOS Ring Fault
The SERCOS Ring Fault bit is set when the SERCOS module detects that a
problem has occurred on the SERCOS ring; i.e., the light has been broken or a
drive has been powered down.