Multiple HDBB2 and drive error reporting

[Derek]

Hi
I have 2 HDBB2 boards. Board 1 has X,Y,Z,A with DG4s drives. I have J2 in the 2-3 position and when a drive faults it triggers the Estop. UCCNC estops. I have the second board setup the same way with a single drive. When it errors the LED6 goes out so the board sees the fault but that is all it does. It does not trigger an estop. I'm sure I'm missing something but not sure what.

Thanks
Derek

[cncdrive]

Hi Derek,

You have to select the J2 jumper to make the error signal to go through to the input pin.
Copied from the HDBB2 manual:

- J2 jumper is for the „common error line / standard digital input” selection.
If this jumper is in the 1-2 state then input#1 works as standard digital input as described in
point 5.1 in this manual.
If this jumper is in the 2-3 state then input#1 gets disabled and the common error line of the
drives gets connected to the LPT port input pin of input#1.
The common error line is the drives's error lines conencted together and also
wired to the error signal terminal onboard. If the ecommon error line goes low
because of any drive's internal fault or because the user triggers the error input
terminal then this signal is feed back to the LPT port pin of input#1.
This signal can be used forexample to trigger an E-stop in the CNC control
software.

[Derek]

Hi
Yes I have J2 set to the 2-3 position on both boards. I'm wondering If I need a common error wire between the two boards?

Thanks
Derek

[cncdrive]

Hi Derek,

Yes, you can connect the 2 error wires of the 2 boards together, but make sure that the 2 boards share the same power supply or if not then common the 0Volts of the 2 power supplies.
Then all drives on both boards will trigger eachother.

[Derek]

Just so I'm clear connect Error I/O HDBB pin 21 together?

The boards are on the same power supply.