Honeywell Series 8 I/O - 13.3 Reviewing IOM hard failures; IOM hard failures

13. Series 8 I/O Alarms and Failures
13.3. Reviewing IOM hard failures
288 Series 8 I/O User's Guide R500
Honeywell April 2017
13.3 Reviewing IOM hard failures
IOM hard failures
The IO module will hard fail or crash when a fatal fault is detected. A fatal fault is a
malfunction (either hardware or software) that is so severe that safe and reliable control
of the process is in jeopardy.
IOM reports device hard failures on the Configuration Form's Maintenance tab for the
IOMLHFSTA / IOMLHFSTB parameters.
Figure 69 Location of hard failure message
To review the FAULTED state of Analog Output and Digital Output failures see,
FAULTED state and IOM hard failure
To recover from an IO module hard failure, perform the following steps.
Step
Action
1
Reset the IO module using the User Reset Contacts located on the IOTA.
Note: The Digital Output outputs with FAULTOPT set to HOLD continue to
HOLD the FAULTOPT state during the user reset operation through the
contacts.
2
Record the Last Hard Fail Status code.
This is located on the Configuration Form's Maintenance tab for the