KB90305
Published: August 27, 2024
Revision: 2.0

Controller unresponsive after attempting to communicate with unreachable Ethernet device


Applies To:

Firmware for the following:

  • SNAP-PAC-S1, SNAP-PAC-S1-FM, SNAP-PAC-S1-W
  • SNAP-PAC-S2, SNAP-PAC-S2-W
  • SNAP-PAC-R1, SNAP-PAC-R1-FM, SNAP-PAC-R1-W, SNAP-PAC-R1-B
  • SNAP-PAC-R2, SNAP-PAC-R2-FM, SNAP-PAC-R2-W

Versions Affected:

R10.0d to R10.4e

Resolved In Version:

R10.5g


Symptoms:

If your PAC Control strategy contains commands to open communication to an Ethernet device, and that Ethernet device is unreachable, then your controller may become unresponsive. This is more likely to happen if the strategy tries to open communication to the device very frequently or repeatedly in a small amount of time.

Workaround:

Try the following:

  • Comment out OPEN instructions to Ethernet devices that you know are unreachable.
  • Insert longer delays between attempts to open communication to the device.

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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