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Momentum Processor Run LED May Blink 2x with an Crash Code 836 After a Power Cycle

Release Notice

This resolution describes a potential issue where the Momentum PLC RUN LED blinks in an error pattern after a power cycle.

Goals and Symptoms

A Momentum PLC Run LED may blink 2x with a crash code 836 after the Momentum assembly is power cycled. The same error may also occur if the Momentum PLC is in RUN mode (without a power cycle event). This condition may occur only if a 172PNN2x022 or 172JNN21032 is part of the assembly. The error will not occur if the 172PNN2x022 or 172JNN21032 is removed or not part of the assembly.

Facts and Changes

This resolution affects the following adapters with the PV number and the 'Date of Manufacture' (DOM) listed:

    • Part Number
      PV number
      Date of Manufacter (DOM)
      172JNN21032
      PV01 or lower
      0801 or higher
      172JNN21032C
      PV02 or lower
      0801 or higher
      172PNN21022
      PV04 or lower
      0801 or higher
      172PNN21022C
      PV03 or lower
      0801 or higher
      172PNN26022
      PV04 or lower
      0801 or higher

    The PV and DOM numbers are found on the battery access door of the PNN and JNN adapters.

Causes and Fixes

Changes were made to optimize filtering on the power supply circuit to improve power on and runtime stability. These changes are not field upgradeable.

If the Momentum PLC Run LED is exhibiting the symptoms described above, it is recommended that the 172PNN2x022 or 172JNN21032 be exchanged. If an exchange is necessary, reference the Quality Information document IQ102452 when ordering.

The following PV numbers identify new or updated adapters:

Part Number
PV number
Date of Manufacter (DOM)
172JNN21032
PV02 or higher
does not apply
172JNN21032C
PV03 or higher
does not apply
172PNN21022
PV05 or higher
does not apply
172PNN21022C
PV04 or higher
does not apply
172PNN26022
PV05 or higher
does not apply

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