[morestuff]

The Error signal pin is a strange beast that is both an output and an input depending on the state of the drive.

When you measured 2.5 volts on pin 5 of the G320X was it also connected to the Masso controller?

On the original G320 (not G320X) the internal source of +5 volts fed to pin 5 had a source impedance of about 1000 ohms and this voltage could be lower if significantly loaded. The newer G320X was redesigned using a CPLD device that only supports I/O voltages up to 3.3 volts and that may have caused a change that is not correctly reflected in the documentation. If this is the case it may be possible to avoid the problem by connecting a resistor of about 10K ohms between pin 5 and the Encoder +5 supply pin. Hopefully this will pull the signal up to 5 volts without supplying enough current to override the power on condition that holds the drive reset until a low impedance source of 5 volts is applied.

Also note that the G320X has a feature that allows pin 5 of all drives to be directly connected together so that if one drive faults, all the others are held reset.

[Mylesok]

The Error signal pin is a strange beast that is both an output and an input depending on the state of the drive.

When you measured 2.5 volts on pin 5 of the G320X was it also connected to the Masso controller?

On the original G320 (not G320X) the internal source of +5 volts fed to pin 5 had a source impedance of about 1000 ohms and this voltage could be lower if significantly loaded. The newer G320X was redesigned using a CPLD device that only supports I/O voltages up to 3.3 volts and that may have caused a change that is not correctly reflected in the documentation. If this is the case it may be possible to avoid the problem by connecting a resistor of about 10K ohms between pin 5 and the Encoder +5 supply pin. Hopefully this will pull the signal up to 5 volts without supplying enough current to override the power on condition that holds the drive reset until a low impedance source of 5 volts is applied.

Also note that the G320X has a feature that allows pin 5 of all drives to be directly connected together so that if one drive faults, all the others are held reset.

Amazing thank you, ended up being 1.8k resistors that did the trick. Having some trouble with drives faulting and even the controller restarting for no apparent reason. Could be a ground loop?