Honeywell Experion DCS Analog Output Card Failure Issue

The module configuration is held in some form of non-volatile memory. The data in this has been changed. The most likely cause is electrical noise, either conducted or radiated.

Review your earthing/grounding scheme, and check that all possible sources of radiated electrical noise in your system are adequately shielded or otherwise protected.

- Residual latent ESD electrostatic discharge damage to a semiconductor.

- Failure due to overheating, like panel cooling failed.

- Malicious reconfiguration by an insider with access to configuration.

- Hacked by an outsider.

Spend a buck. Contact the people who build the equipment. Save some time.
Experion PKS - Honeywell Process Solutions

Have you thoroughly reviewed the Network History Module to identify which circuit caused the failure?

If the DCS system is properly configured there should be a "major-fault" recorded inclusive of the A/O address along with DATA identifying the type of fault.

My first guess is that you suffered a short-circuit and/or ground and/or improper voltage was applied to a field device with the cause attributed to a person troubleshooting, tuning, or adding a device.

My second guess would be that a person inadvertenetly removed an A/O card and/or inserted an A/O card incorrectly.

My last guess would be that somehow a lot of noise was induced into the DCS system causing the program checksum to be invalid.

These types of fault will cause the DCS to isolate the A/O section in order to protect the rest of the DCS system.

If you do not have the technical expertise required to perfrom this, call the factory