I've been mucking around with handling servo motor faults connected into my PMDX-126 on my CNC mill.? The PMDX-126 is configured to use the Charge Pump as is MACH3 on WIN-XP.

?

I'd like some clarification on what the ONLINE button does.

?

What appears to happen is if a fault occurs the PMDX-126 acts as if the ESTOP was pressed and all outputs are switched off including the Charge Pump and the ENABLE pin.? (Charge Pump currently set to not stay on during ESTOP).? Remove the fault and click on the RESET button and the system comes back on as do the indicators showing Charge Pump (DB25-17 output) and the Enable Pin (DB25-1 output).

?

Now if I set Leave Charge Pump on during ESTOP and again create a fault the system shuts off.? But clicking the RESET button doesn't work and reports external Estop requested.??? Only if I click twice on the ONLINE button does the system allow the RESET button to work.? Now with the Charge Pump back the RESET switches on the ENABLE pin and the outputs are back.

?

In both cases if I click on the ONLINE button it appears as if the Charge Pump signal is removed and then re-asserted. ?Have I got that right?

?

And if I disable the Charge Pump (X in the Outputs) then the ONLINE button doesn't appear to do anything other than disable the motion keys on the keyboard. ?I would have thought the output pins marked as Enable_x would go false.? Even a LIMIT switch will cause the Enables to go false and RESET button to blink.? Remove the limit switch issue and the reset brings back the Enable.

?

I feel the Charge Pump, especially since it's supported on the PMDX-125/126, is an absolute must.? If the PC crashes things like motors that run open loop like coolant or a spindle must stop even though it uses a pin.?

?

However I'm surprised at the behavior of the ONLINE button.? Why would it remove the Charge Pump and not bring the ENABLE pins low?? Or is there a configuration bit I'm missing?

?

?

Thanks

John

?

?

?

?

?

"ELS! Nothing else works as well for your Lathe"

Automation Artisans Inc.

www dot autoartisans dot com

?