ESAB 0558011310, Instruction Manual

Page: 46 / 70

OPERATION
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modes of operation
Plasma unit can be operated in Cutting Mode or Marking Mode. The command to operate the machine in Cut-
ting or Marking mode can be received from the CNC or Process controller through CAN (digital) communication
or through analog communication. The default mode of operation is cutting.
Digital communication:
In this mode, the plasma unit and CNC or process controller are communicated through CAN protocol (CAN
connector). Plasma unit recieves the digital and analog inputs required for the process state machine and
transmits the respective digital and output signal to CNC or process controller through digital CAN protocol.
CNC or process controller sends the command to operate the plasma unit either in cutting mode or marking
mode.
A shielded CAN cable, as listed in section 3.8.2, is used to connect CAN connector and customer CNC/pro-
cess controller. There is 120 ohm termination resistor available on control board (PCB1) which is selected by
a switch setting. By default this switch is set to 120 ohm termination resistor position.
note:
Always connect CAN power supply unit at the end of the CAN hub.
analog communication:
In this mode, the plasma unit and CNC/process controller are communicated through Analog Interface Con-
nector. CNC or process controller closes and opens the relay, which are hard-wired into digital inputs of
microcontroller on PCB1 inside plasma unit, to operate the plasma unit in marking or cutting mode respec-
tively. A shielded DB25-DB25 cable, as mentioned in section 3.8.3, connects the analog interface connector
to the junction box.