During the small roll setup the operator uses a foot pedal that runs the machine at a very slow speed using the VFD's jog function. Subsequently the machine switches to run mode and spools up to high speed.
I'll be using the analog out of a PLC to control the speed allowing the user to set the ultimate peak speed via the HMI.
I can obviously and simply use the same speed control to jog the system for setup.
The question is this.
Do you think this injects a hazard that wouldn't be there if I stuck with running the jog via the VFD's digital jog function.
kcress - http://www.flaminsystems.com