I found three acl files that look interesting, while exploring acnet land. I list them below.
numipmtgthvramp.acl
Description: Prototype program to ramp HVs on NuMI Hadron Monitor.
numimumonhvramp.acl
Description: Prototype program to ramp HVs on NuMI MUON Monitors.
Since my aim, in looking, is to write a script that will ramp E:NDMAG down to zero, reverse the polarity switch, ramp it back up again, ramp it down and up once more, these scripts that I found are quite interesting. Bob Zwaska said that he wrote these scripts (and used them).
Fast time plot from test of ACL script, using device E:H104F (not hooked up to anything), showing 1 amp decrements every 3 seconds, from 12 amps to 0 amps
Actually, this is unnecessary, I realized. The power supply regulator circuitry will do the ramping, at 100 amps per second, when the reference voltage fed to it is changed.