We have a MC024-020 PLUS+1 controller driving PVES valves. Analog inputs are from potentiometers (Vexcitaton is 5V sensor power from controller) into Sensor blocks to PVE_A_H_S blocks to MFOuts.
Configuration is as follows:
For my application I have 6 analog inputs (C2P01, C2P02, C1P05, C1P10, C1P11, C1P12) corresponding to 6 outputs (C1P03, 04, 05, 06, 07, 08) to drive 6 PVES valves. The one output version has input = C2P01 and output C1P03.
I have set in PLUS+1 for each Input and Output values below:
Application.PVE_A_H_S.DigiIn.PinConfig = 2
Application.PVE_A_H_S.DigiIn.PinConfig0 = 2
Application.PVE_A_H_S.Output.PinConfig = 6
Outputs.Group1.CurChgLim = 111
Outputs.Group1.DitherFreq = 0
Outputs.Group1.ReqFreq = 4000
Outputs.C2P03_MFOut1.DitherAmp = 0
I still get dither: 25V amplitude, 2.6kHz frequency and PWM varies with input voltage.
I would like a steady, non-dither output voltage to drive PVES valve.
Previous version of code had a multiplier between the sensor function and the PVES function. This would multiply the Sensor output by +1 causing the PVES function output to range from 50% to 75% of PVES excitation corresponding to a 0 to 100% PVES flow from port A. Or it would multiply the Sensor output by -1 causing the PVES function output to range from 50% to 25% of PVES excitation corresponding to a 0 to 100% PVES flow from port B.
For 0 to 100% speed in one direction, PVES output is 1/2 to 1/4 PVES Vsup. Signal is steady.
For 0 to 100% speed in other direction, PVES output is 1/2 to 3/4 PVES Vsup. Signal is noisy.
I removed the multiplier and the noise went away. Very strange.
Anybody seen this before and anybody have any answers?
Any and all help is greatly appreciated.
