KB90239
Published: August 24, 2022
Revision: 3.0

Frequently writing unchanged values to some OptoMMP areas may cause excessive writes to permanent storage


Applies To:

Firmware for the following groov EPICs:

  • GRV-EPIC-PR1
  • GRV-EPIC-PR2
Firmware for the following groov RIOs:
  • GRV-R7-MM1001-10
  • GRV-R7-MM2001-10
  • GRV-R7-I1VAPM-3

Versions Affected:

For groov EPICs: 3.0.0 to 3.4.1
For groov RIOs: 3.0.0 to 3.4.0

Resolved In Version:

For groov EPICs: 3.4.2
For groov RIOs: 3.4.1


Symptoms:

The following areas of the OptoMMP memory map trigger writes to permanent storage:

  • (EXPANDED) Analog & Digital Channel Configuration
  • Streaming Configuration
  • Custom Configuration
  • Modbus Configuration
  • PAC Control Engine Configuration
  • Public Tags configuration
  • PID Configuration and Status
Frequently writing unchanged values to these areas causes excessive writes, which shortens the life of the permanent storage.

Workaround:

Add logic to your PAC Control strategy, CODESYS application, or custom program to write to these areas only if a value changes.

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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