I am going to be writing a program on an AB SLC 5/05 to control a hydraulic proportional valve using the :

Allen Bradley Cat. No 1746-NO4V analog output card

4 outputs (±10V dc) 55 mA @ 5V

145 mA @ 24V — 2.5 ms 512 ms 14

I am not sure which command to use to get the 0-10VDC output from the card.
( Example: for an analog INPUT I'd take the analog voltage at the card and convert it using the "scaling with parameters" command)

Can anyone help me figure out which command to use to get the correct output voltage from this card?

The hydraulic porportional valves that I use take a -10V to +10V signal. Negative voltages shift the spool one way, positive voltages move it the other way.

I configure the command so that 50% output is equal to 0 volts and that will center the spool.

I usually use the CLX processors now, but in a SLC500 I would use a SCP instruction, so that if my command was in F8:0 and the output was O:10.0 the insturction would look something like this:

SPC F8:0 0.0 100.0 -32768 32767 O:10.0


-32768 corresponds to -10V output, and 32767 corresponds to +10V output.