Thanks Hood! I have been reading your posts for the past month and you have helped tremendously with my questions during this project.
The encoder is off a 1:1 pulley with 1024 count. CSMIO was reporting 4 revolutions for 1 actual revolution so I had to set P/Rev to 4096 to sync. Not sure why this encoder has such low resolution unless controls in 1995 couldn't keep up at 6000 rpms?
Before purchasing the ENC module, I had the encoder connected to Channel 3 of CSMIO/IP-A. The config screen (attached jpg) does not allow any Channel option for ENC-1 encoder port. I can only assume the plugin does it automatically. Besides it not stopping at angle set, there are some other odd things like Mach3 GUI speed controls doing nothing but S codes do. RPM dro is being updated fine.
One area that might be problematic is the Mach3 [Spindle CW F5] button controls a relay that opens the SimoDrive 611 Spindle control enable signal, immediately stopping the spindle and disabling (required for tool unclamping). I am not sure how long CSMIO-ENC needs to orient it and if it is disabled too fast. I have tried overriding the spindle enable but it didn't seem to resolve it.
http://www.machsupport.com/software/plugins/ - shows ENC in plugin list but the link is no good. I hope this isn't me just missing a plugin. I have found nothing related to a separate ENC plugin on cs-lab website.