**EDITED TO CLARIFY 2nd and 3rd PARAGRAPHS **
First, to clarify:
DS1 is the power LED and should always be on.
DS2 is the "Outputs Enabled" LED and is a small surface-mount LED next to connector J10
Of the two right-angle LEDs, currently the green LED flashes on and off once per second if the firmware is running, and the red LED only comes on for approx 1 second during startup (it will eventually be the "EStop" LED).
If you click on the Mach4 "Enable" button (blinking green before you click on it), and it changes to red and says "Disable" and the PMDX-422's "Output Enable" LED does not light, you most probably have the EStop input active. This is a potentially confusing part of the Mach4 GUI - when the button says "Enable", Mach is disabled and waiting for you to enable it. When the button says "Disable", Mach4 *thinks* it is enabled (even though it may not be, see below) and is waiting for you to disable it.
There is a bug in the Mach4 GUI - it will allow the "Enable" button to act like Mach4 is enabled when in fact it is not. And by extension, our device is not enabled. You can verify that this is the case by clicking on the "Diagnostics" tab (*NOT* the "Diagnostics" menu item) and look at the "Emergency" indicator near the upper left corner of the screen. If it is red, that means that the E-Stop input is active.
If you are using the sample profile provided with the PMDX-422 Plug-In, it is configured to have "Pin10" assigned to the E-Stop input. That means that in order for Mach4 and the PMDX-422 to be "enabled", you need to:
- Ground the "E-Stop/Pin10" pin on connector J7 (jumper connector pin 2 to pin 1)
- *or* ground the "E-Stop" pin on connector J10 (jumper connector pin 2 to pin 1)
- *or* if you are using an external break-out board connected via a ribbon cable to J2, then ground the Pin 10 signal on the external break-out board.
You should then see the "Emergency" indicator turn off (show as dark red). If the Enable/Disable button still says "Disable", then click on it so that it says "Enable", then click one more time. You should now see the "Outputs Enabled" LED on the PMDX-422 turn on.
If not, let us know and we will see what else we can figure out.
Bob
