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What would cause an Unknown Controller status when connecting to a Momentum 171CCS76000?

One of the possible causes of an Unknown Controller error is if you have a PV:02 controller and do not have the minimum required executive loaded. Below are details of the minimum executive revisions required for the PV:02 controllers:
Programming Language
Minimum Executive Required
984LL M1LLV206.bin
IEC -- Concept v2.1 B2.1 M1IV206B.bin
IEC -- Concept v2.2 SR2 M1V206C.bin
IEC -- Concept v2.5 SR2 M1IV206D.bin

Note: These executives can be downloaded from our website.
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