Originally Posted by GSH
I have an application where I am using 2 Baldor Vector drives and I am trying to start the drives remotely and then use the keypad to adjust speed. These are the older ZD18H.... drives. The drives will start but with no speed reference (desired RPM is at 0). When I try to use the keypad to adjust speed, nothing happens. I have the drive set up for Standard Run but do not see anywhere in the manual to set up a remote start and local speed reference. Anyone familiar with how or if this can be accomplished?
Generally, VFD command and control is divided into two separate sets of programming functions:
- Where is the Run / Stop command going to come from?
- Where is the Speed Reference going to come from?
But if I remember correctly, this Baldor drive (which I never liked) does not totally separate these functions like almost all others do. I think that if you put it in Remote Start/Stop command mode, it ONLY allows a speed command to come from the analog inputs, not the keypad. Then if you put it in Keypad control, you don't have a 3-wire remote start-stop capability. Silliness.
What we did however, is use it in Keypad control mode, then used the "Enable" input as a virtual Run command by hard wiring the remote Stop command input. The issue was, if you wanted 3-wire control you had to make it externally with a control relay and use a relay contact as the Enable command. Again, silly...
Make sure you enable the keypad Stop control by the way, I think it's dangerous to have a Stop Key on the Keypad that does not stop the drive.