Redundant systems may log -539, -29, or -534 errors to the controller's Message Queue

Applies To:

SNAP-PAC-S1
SNAP-PAC-S1-FM
SNAP-PAC-S1-W
SNAP-PAC-S2
SNAP-PAC-S2-W

Versions Affected:

Problem was discovered in version: PAC firmware R9.5d (Lower versions may be affected)
Problem is fixed in version: FW R9.5e

Resolved In Version:

Problem is fixed in version: FW R9.5e

Symptoms:

When these conditions exist in a system:

The system is using redundant controllers
The control strategy sets time-proportional outputs (TPOs)
At least one input point has been assigned a default value in PAC Control's Edit Point dialog box (Configure > I/O > I/O Points button > {select an input point} > Modify button)

...the following errors may be logged to the controller's Message Queue:

-539 I/O error; performing retry.
-29 Wrong object type. Most likely caused by moving a pointer table element to a pointer of the wrong type.
-534 Attempt(s) to communicate with I/O Unit failed.

In the Message Queue, the Chart column for all of these errors will be the <system> chart, and "N/A" will be displayed in the Block and Line columns.

Resolution:

Opto 22 has resolved this issue.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com

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