[barrigo]

I am looking for recommendations on how to trigger an e-stop from a G320x's err/res pin going low due to a fault. I would like Mach3 to know when a drive faulted.

[morestuff]

The traditional way to support the ERR output from
the G320X is trigger an emergency stop.

There are several issues to consider when interfacing
with the G320X's ERR/RES signal:

1) This signal shares a ground reference with the motor
power supply. If you want to retain the opto-isolation
provided by Gecko on the Step and Direction inputs,
you must also isolate the ERR/RES signal.

2) The ERR/RES signal is not intended to directly drive
most opto-couplers. There is a diagram of a buffered
interface for an LED (or input of an opto-coupler)
shown on the last page of the older G320 servo drive
users manual. Look under legacy products on Gecko's
web site to see the G320.

3) The ERR/RES signal is both an input and an output.
You must be able to pulse it with +5 volts to reset
drives on power up, and then go back into a monitor
the signal mode once they are running.

The PMDX-126 provides a special I/O signal that provides
all of the above. It will generate an emergency stop in
response to an ERR from the G320X and will allow resetting
the drivers from the host computer running Mach3. A full
description of using the PMDX-126 with G320 or G320X servo
drivers is shown in this application note:

http://www.pmdx.com/Doc/AN125-2_GeckoRestart_01.pdf

Regards,
Steve Stallings
www.PMDX.com

[ger21]

Here's another option.
Gecko Error Reset Controller