We are using a Powerflex 755 with a Safe Speed Module for safe speed limiting and door monitoring. We have a 20-750-ENC-1 which was purchased for this project, but I am seeing in some documentation that a 20-750-DENC-1 (dual encoder) is required for this. We are receiving a feedback fault from the safe speed module which tells me the problem is with the encoder module and I am thinking we have the wrong one. However, while poking around Drive Executive under the Safe Speed module, under Feedback, under Fbk Mode (Parameter #27), I can choose Single or Dual, so I would expect the 20-750-ENC-1 to work. Wrong? Also, we cannot locate any manuals on the encoder modules. Are these available or are they buried in a different manual?
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