Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual - Manual (Page 321)

Publication 1784-UM003A-EN-P – June 2003
Motion Object Attributes 313
All of the fault bit attributes defined below can be handled by the
ControlLogix processor as a Major Fault by configuring the associated Group
Object’s “General Fault Type Mechanism” attribute accordingly. Otherwise
any specific fault handling must be done as part of the user program.
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.
GSV/SSV Access Attribute Name Data Type Values
GSV Servo Module Fault
Bits DINT Direct Access
Entire DINT - ServoModuleFault
0: Control Sync Fault
-ControlSyncFault
1: Module Sync Fault
-ModuleSyncFault
2: Timer Event Fault
-TimerEventFault
3:Module Hardware Fault
-ModuleHardwareFault
4-31: Reserved