4 Fault Isolation
4.3 Fault Isolation Concepts
310
HPM High-Performance Process Manager Service
R688
Honeywell
December 2020
Fault isolation flowchart (Sheet 5 of 6)
Figure 184 HPM Fault Isolation Flowchart (Sheet 5 of 6)
14376
Output IOP
Multiple IOPs in
NORESP?
Investigate/consider a possible ESD or
RFI problem. Also verify proper system
installation, especially power and ground.
Known ESD,
RFI or system
installation
problems?
Startup okay?
Replace the IOP.
Check the last failure
code. See Table 4-5.
Stop.
Replace the IOP.
Check the IOP cables,
power, and grounding.
Check for ESDand/or
RFI.
Use a Standby
Manual Device for
the outputs
(per Section 7).
Check the FTA
connection to the IOP.
From Sheet 2
IOP Hard Failure
Yes
No
Yes
No
No
Yes
Yes
No
This sheet shows the path for IOP Hard
failures, NONEXIST or NORESP.
Note:
4
Resolve the detected
problem(s).
Restart the IOP.
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