Well, I was hoping to have the PMDX-407 User's Manual rewrite finished by today, but we are still editing things. So here are two relevant images.
The first image shows the recommended PMDX-122 jumper configuration and PWM signal connections to the PMDX-407-S. Note that we recommend using the "charge pump" facility on the PMDX-122. When using an external motion controller such as the UC100 (or any of the PMDX SmartBOB boards... shameless plug if you want to run Mach4) this is less critical than if you are connecting the PMDX-122 directly to a PC parallel port. The image shows parallel port pin 16 as the PWM signal. You may also use pin 14. And if you are not using the "charge pump" feature, you may use pin 17 (presuming the UC100 supports PWM on this pin). If you decide to use pin 17 for the PWM signal, change PMDX-122 jumpers JP1 to "normal" and JP3 to "Not EStop/Fault".
The second image shows the connections from the PMDX-407-S (and 122) to a typical VFD. In order to be able to control the spindle direction you must use the relay on the PMDX-122 board as shown. Map the Mach "spindle reverse" signal to parallel port pin 1 and make it "active high" (a red "X" in the "active low" column).
If you are already using the PMDX-122 relay for something else, you will need an external relay single pole double throw relay (i.e. with both "normally open" and "normally closed" connections) that can be controlled by a logic-level output. Or (more likely) use a solid state relay (
http://www.pmdx.com/SSR--25, for example) to switch AC voltage to the mechanical relay's coil. Let me know if you are already using the PMDX-122's relay for something else.
Configure the PWM signal for a frequency of 100 Hz.
Bob
