Appendix B – CnC interfACe protoCol
HPR400XD Auto Gas – 806160 b-3
Pierce Complete Input When active, the system will use shield preflow gases during
piercing. When the signal is removed, the system will switch to shield
cutflow gases. The signal should be applied at the same time the
start signal is applied.
Corner Current Input When active, the system will switch to user specified corner current.
Remote Power Input Used to turn the power on or off
Not Ready for Start Output When on, this signal indicates that the plasma system is not ready for
a plasma start signal. This could be because the system is purging or
in test gas mode.
Ramp-down Error Output Indicates the arc did not ramp-down properly. Consumable life is
shortened.
TX+ Serial Transmitting from the system
Connect to CNC RX+
TX– Serial Transmitting from the system
Connect to CNC RX–
RX+ Serial Receiving by the system
Connect to CNC TX+
RX– Serial Receiving by the system
Connect to CNC TX–
Signal list (continued)
Signal name Type Description
Hardware
Inputs – active low, dry contact, opto-isolated
Inactive: 24 V or open circuit, 0 mA
Active: 0 V or closed contact (0 ohm min, 6.5 mA; 200K ohm max, 0.1 mA)
Outputs – active low, open collector, opto-isolated
Inactive: Up to 40 V open circuit/open collector, 0 mA
Recommended 24 V pull-up into high impedance load
Active: 0.3 V max output into high impedance load, sinking capacitor up to 5 mA
Or 2k ohm minimum load resistance
Serial – RS422 serial communications
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