eRCM Express™ Troubleshooting

Issue: If communications between the PLC and the eRCM Express box seem to be working, but only zeroes are being returned for most all tags/registers, then:

  1. Check that the eRCM Express License is installed and valid on the mCore.
      • How to do: See the section “Uploading a License File” in the eRCM Express Manual.
  2. Check that at least one (1) eRCM Viewer model has been uploaded to the mCore and that the model names start with a digit (“1” through “9”)
      • How to do: See the section “Uploading a License File” in the eRCM Express Manual.
  3. Check if the PLC is sending any data in ACI_Input[50] (SetViewerFile, Modbus Reg# 40101). This item is used to specify which eRCM Viewer model to be used within the eRCM Express.
      • Values less than zero (0) or greater than nine (9) are ignored.
      • A value of zero (0) tells eRCM Express to take no action, and to keep using the current modeling file.
      • A value from one (1) to nine (9) tells the eRCM Express to load in the eRCM Viewer models starting with that digit.
      • In generally, this item’s value should be zero (0) if only one file is in the eRCM Express box, and this item never needs changed.
      • If multiple models are in the eRCM Express box, then this item’s value should only get set during Unit Start Up, and thereafter reset to zero (0).
      • If a value in ACI_Inputs[50]/Reg#40101 sets eRCM Express to a non-existent unit (i.e. no modeling file starting with that specified digit), then no data will be returned, and all data items will stay at their initial values of zeroes (0). 

Issue: Next load step up/down does not return sensible results when using “Field_Ps” feature.

      • Affects: Version 0.5.0 to 1.1.31 mCore.
      • Symptoms: When passing a value in the “Field_Ps” tag, next load step up/down results will not be correct for the current load step.
      • Workaround: Write a value of “0” (zero) for the “Field_Ps” input tag value.  This will turn off that feature and next load step up/down will be correct.

Issue: Uploading valid eRCM Viewer files sometimes does not correctly copy those file into the mCore and results in some zero-byte files being created in the mCore that cannot then be used.

      • Affects: Version 0.5.0 and 0.5.1 of mCore.
      • Symptoms: The desired eRCM Viewer file is included in the list of files in the web interface, but when retrieving compressor calculations, all values are zero — all the time.
      • Workaround: In the web interface, click the Clear All Viewer Files button, then navigate to the Import Viewer files upload page and upload the eRCM Viewer files again.
      • If issue is not resolved, try repeating the above workaround a couple of times.
          

Issue: Uploading a valid eRCM Express licensing file sometimes does not correctly copy that file into the mCore and results in a zero-byte file being created in the mCore. Internally, the mCore is not licensed to use eRCM’s calculation methods, and thus does not return useful results.

      • Affects: Version 0.5.0 and 0.5.1 of mCore.
      • Symptoms: Static items Ranges, Number of Load Steps, etc. are still returned, but all registers with performance and control items are returned as zeroes.
        • Note: This issue would only occur if the license file was accidentally removed and the user is trying to re-license the mCore, or if the user is upgrading unit from a Condition Monitor license to an eRCM Express license.
      • Workaround: In the web interface, click the Clear ACI License File button, then reupload the provided license file.
        • If issue is not resolved, try repeating above workaround a couple of times.