Allen-Bradley GuardLogix 5570, User Manual

Page: 146 / 172

146 Rockwell Automation Publication 1756-UM022D-EN-P - May 2017
Chapter 9 Monitor Status and Handle Faults
Recoverable faults let you edit the standard and safety application as required
to correct the cause of the fault. However, if a safety task signature exists or the
controller is safety-locked, you must first unlock the controller and delete the
safety task signature before you can edit the safety application.
View Faults
The Recent Faults dialog box on the Major Faults tab of the Controller
Properties dialog box contains two sub-tabs, one for standard faults and one for
safety faults.
The status display on the controller also shows fault codes with a brief status
message, as described beginning on page
149 .
Fault Codes
Table 46 shows the fault codes specific to GuardLogix controllers. The type
and code correspond to the type and code displayed on the Major Faults tab of
the Controller Properties dialog box and in the PROGRAM object,
MAJORFAULTRECORD (or MINORFAULTRECORD) attribute.
The Logix5000 Controllers Major and Minor Faults Programming Manual,
publication
1756-PM014 , contains descriptions of the fault codes common to
Logix controllers.
Table 46 - Major Safety Faults (Type 14)
Code Cause Status Corrective Action
01
Task watchdog expired. User task has not completed in a
specified period of time. A program error caused an infinite
loop, the program is too complex to execute as quickly as
specified, a higher priority task is keeping this task from
finishing, or the safety partner has been removed.
Nonrecoverable Clear the fault.
If a safety task signature exists, safety memory is re-initialized and the safety
task begins executing.
If a safety task signature does not exist, you must re-download the program so
the safety task can run.
Reinsert the safety partner, if it was removed.
02 An error exists in a routine of the safety task. Recoverable Correct the error in the user-program logic.
03 Safety partner is missing. Nonrecoverable Install a compatible safety partner.
04 Safety partner is unavailable. Nonrecoverable Install a compatible safety partner.
05 Safety partner hardware is incompatible. Nonrecoverable Install a compatible safety partner.
06 Safety partner firmware is incompatible. Nonrecoverable Update the safety partner so that the firmware major and minor revision
matches the primary controller.
07 Safety task is inoperable.
This fault occurs when the safety logic is invalid, for example
a mismatch in logic exists between the primary controller and
safety partner, a watchdog timeout occurred, or memory is
corrupt.
Nonrecoverable Clear the fault.
If a safety task signature exists, safety memory is re-initialized via the safety
task signature and the safety task begins executing.
If a safety task signature does not exist, you must download the program again
so the safety task can run.
08 Coordinated system time (CST) not found. Nonrecoverable Clear the fault. Configure a device to be the CST master.
09 Safety partner nonrecoverable controller fault. Nonrecoverable Clear the fault and download the program. If the problem persists, replace the
safety partner.