KB86631
Published: March 27, 2017
Revision: 1.0

Analog output points reset to low scale or zero-equivalent; counts increase for Module Times Discovered and Arcnet Reconfigs


Applies To:

SNAP-PAC-EB2
SNAP-PAC-EB2-FM

Versions Affected:

Versions affected: I/O coprocessor firmware lower than R3.0a
Problem is fixed in version: I/O coprocessor firmware R3.0a

Resolved In Version:

Problem is fixed in version: I/O coprocessor firmware R3.0a


Symptoms:

If the value of an analog output point changes, after a few minutes, the value may then reset to the module's "low scale" or zero-equivalent value.

  • Unipolar modules (like SNAP-AOV-5, all of the SNAP-AOA series, AOV-25, AOD-29 series, and some points on -AOVA-8) may reset to their low scale value.
  • Modules with bipolar points (like SNAP-AOV-7, -27, and some points on -AOVA-8) may reset to the value associated with zero counts. (For example, on a -10 to +10 VDC output, the point may reset to 0 VDC).
You can see this behavior by using PAC Manager (Tools > Inspect >Analog Bank button), and periodically clicking the Refresh button to see if a change has happened.

Also, the counts for Module n- Times Discovered and for Arcnet Reconfigs may slowly increase over time (when they shouldn't). This behavior is also visible using PAC Manager (Tools > Inspect > Status Read button, and clicking Refresh to watch for changes).

NOTE: This is a coprocessor issue.

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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