Rockwell Automation 1784-PM16SE SoftLogix Motion Card Setup and Configuration Manual - Manual (Page 320)

Publication 1784-UM003A-EN-P – June 2003
312 Motion Object Attributes
For example, loss of channel quadrature for an encoder can be caused by
physical misalignment of the feedback transducer components, or excessive
capacitance (or other delays) on the encoder signals. Proper grounding and
shielding techniques can usually cure radiated noise problems. See the
1784-PM02AE Installation and Setup manual for information on grounding
and shielding. This fault condition is latched and requires execution of an
explicit MAFR (Motion Axis Fault Reset) or MASR (Motion Axis Shutdown
Reset) instruction to clear.
Position Error Fault
If the Position Error Fault bit attribute is set it indicates that the servo has
detected that the axis position error has exceeded the current configured value
for Position Error Tolerance. This fault condition is latched and requires
execution of an explicit MAFR (Motion Axis Fault Reset) or MASR (Motion
Axis Shutdown Reset) instruction to clear.
Drive Fault
If the Drive Fault bit attribute is set it indicates that the external servo drive
has detected a fault and has indicated such to the servo module via the Drive
Fault input. This fault condition is latched and requires execution of an explicit
MAFR (Motion Axis Fault Reset) or MASR (Motion Axis Shutdown Reset)
instruction to clear.
Module Fault Bit Attributes The Module Fault Bit attribute is a collection of all faults that have module
scope as opposed to axis scope. Generally, a these module faults are reflected
by all axes supported by the given servo module.
Module Fault attribute information is passed from a physical module or device
to the controller via an 8-bit value contained in the in the header of the
Synchronous Input connection assembly. Thus, these fault bits are updated
every coarse update period by the Motion Task. The module’s map driver
should also monitor module Faults so module fault conditions can be reflected
to the user through the Module Properties dialog.