How to control Allen Bradley PowerFlex700 Variable frequency drive

[pmill]

I am trying to find out how to control PowerFlex700 VFD from Allen Bradley.

Adapters from Allen Bradley accept RS-232 DF1 or RS-485 DF1. Does anybody wrote VIs to these protocols?

[Wayne.C]

pmill,

I have in the past written VI's that communicate via DF1 with an AB PowerMonitor.  DF1 is a bit of a pain but very doable in LV.  First step is the spec for DF1.

One thing that trips up a lot of programmers is the 'seed' number used when calculating the CRC for DF1.  AB uses a different 'seed' number than Modbus.