I have prgrammed the Plus+1 to control a Parker VPL valve and verified that it is outputting a 0 to 100% duty cycle, 24V amplitude square wave, and 75Hz. The Parker representative has verified that the valve is a 75Hz VPL valve. It is mounted in a hydraulic fracturing equipment and the sernial number / part number are not visible.
The valve gives 0 to 100% output with approximately 14 to 27% duty cycle. This does not compute with the VPL specs which say the valve should output 0 to 100% with a duty cycle from 25 to 85%.
We want the full range response of the valve over a larger duty cycle to get the desired control.
Does anybody have any experience or solution to this or seen a similar problem with the combination of Plus+1 and VPL?
Please email me - paul.knapp@advmeas.com
Thank you for your help in advance.
