Is it possible to configure a DMC-4200 to use an axis to generate a command voltage output profile without using feedback? For example, ramp the axis command voltage output from 0 V - 5 V over 2 seconds, hold 5 V for 2 seconds, ramp to 2 V in 1 second, etc. I know I can write a PLC program to generate this using a loop to update the output by using the OF command, but I would like to use regular motion commands (SP, AC, etc.) instead if possible.
My thought was that I may be able to tie the output command to the corresponding analog input for the axis and set the axis for analog feedback mode (AF). However, I'm concerned that this will create a feedback loop that will result in oscillation. Perhaps the PID loop can be tuned to prevent this? Is there another way to generate an analog output voltage profile?
KushalP on 03/22/2017 - 16:55
Hi chvogt,
The best way to generate an Analog Output signal would be to use the OF command. You have a DMC code loop that can update the OF value based on the desire voltage. If you used the motor command signal and commanded motion, you would need to have PID values set. If the PID values were set and you had no position feedback, you would accumulate position error and your motor command signal value would increase to compensate for the position error.
Using OF with the PID parameters set to 0 will allow you to output any voltage within the +/- 10 V range.