KB91588
Published: September 15, 2026
Revision: 2.0
SNAP analog modules briefly report out-of-range on all channels 49.71 days after power up or reset
Applies To:
- SNAP-AICTD
- SNAP-AICTD-4
- SNAP-AIMA
- SNAP-AIMA-4
- SNAP-AIMA-i
- SNAP-AIMA-iSRC
- SNAP-AIMA2-i
- SNAP-AIMV-4
- SNAP-AIRTD
- SNAP-AIRTD-1K
- SNAP-AIRTD-10
- SNAP-AIRTD-8U
- SNAP-AITM-i
- SNAP-AITM-i-C
- SNAP-AITM2-i
- SNAP-AIV
- SNAP-AIV-4
- SNAP-AIV-i
- SNAP-AIV2-i
- SNAP-AOVA-8
Versions Affected:
All versions prior to R2.2c for all modules except the following:
- SNAP-AIRTD-8U: All versions prior to R1.0f
- SNAP-AOVA-8: All versions prior to R1.4b
Resolved In Version:
R2.2c for all modules except the following:
- R1.0f for SNAP-AIRTD-8U
- R1.4b for SNAP-AOVA-8
Symptoms:
Every 49.71 days after module power-up or reset, all channels briefly return a float value of NaN or counts of -32768, except for SNAP-AIRTD-8U, which returns -2,147,483,648.
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
DISCLAIMER
This Opto 22 Knowledge Base ('OptoKB') article is intended to provide general technical information on a particular subject or subjects and is not an exhaustive treatment of such subjects. Accordingly, the information in this OptoKB article is not intended to constitute application, design, software, or other professional engineering advice or services. Opto 22 may modify the OptoKB articles at any time. Before making any decision or taking any action which might affect your equipment, you should consult a qualified professional.
OPTO 22 DOES NOT WARRANT THE COMPLETENESS, TIMELINESS, OR ACCURACY OF THE DATA CONTAINED IN THIS OPTOKB ARTICLE AND MAY MAKE CHANGES THERETO AT ANY TIME AT ITS SOLE DISCRETION WITHOUT NOTICE. FURTHER, ALL INFORMATION CONVEYED HEREBY IS PROVIDED TO USERS 'AS IS.' IN NO EVENT SHALL OPTO 22 BE LIABLE FOR ANY DAMAGES OF ANY KIND INCLUDING DIRECT, INDIRECT INCIDENTAL, CONSEQUENTIAL, LOSS PROFIT, OR DAMAGE, EVEN IF OPTO 22 HAS BEEN ADVISED ON THE POSSIBILITY OF SUCH DAMAGES.
OPTO 22 DISCLAIMS ALL WARRANTIES WHETHER EXPRESSED OR IMPLIED WITH RESPECT TO THE INFORMATION (INCLUDING HARDWARE, SOFTWARE, AND/OR FIRMWARE) PROVIDED HEREBY, INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE, MERCHANTIBILITY, AND NON-INFRINGEMENT. Note that certain jurisdictions do not sanction the exclusion of implied warranties: thus, this disclaimer may not apply to you.
Copyright © 2026 Opto 22. All rights reserved.