Cyclic Redundancy Checks When Using NI 9350

Updated Oct 8, 2019

Reported In

Hardware

  • NI-9350

Issue Details

I have a cRIO chassis containing the Functional Safety Module NI-9350. When I am running a LabVIEW code, I receive the following error:
Error -65492 occurred at Shared Variable in FpgaInterface.lvlib:ActionReadSafetyInputs.vi->FpgaInterface.lvlib:ActionExecuteStateAction.vi->FpgaInterface.lvlib:ProcessLoop.vi->MAIN-RT.vi

Possible reason(s):

The operation failed because of CRC error. Check the module power supply and reinsert the module.

This error or warning occurred while reading the following Shared Variable:
\\RT<file:///\\RT> CompactRIO Target\Mod8\Var1
\\192.168.1.10\Mod8\Var1<file:///\\192.168.1.10\Mod8\Var1>

Why is this happening and how do I fix this?

Solution

This error occurs because the scan engine has been set to an unstable speed (faster than 1kHz). To fix this, right-click the chassis in the LabVIEW project and set the scan engine to be 1ms or slower.

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