Peter Nachtwey
Member
What do you mean by control curve? The green line should be the output to the valve. The valve has an inner control loop that should position the valve to 50% open when a 5 volt signal is applied. The valve takes -10 to +10 volts. There is a spool position feedback which most people don't bother with.It would be very interesting to see also the control curve, because the nature of the noise modes in the valve position signal is not clear.
I wrote the code for they HYD02 and M02AS controllers over 20 years ago. The code for the HYD02 and M02AS started with the M02AE code. There where conditional compiles that would add or remove code depending on the feedback. The advantage is that the learning curve going from one controller to the next was minimal. The same commands from the PLC could control all three versions.