SOFTWARE FUNCTIONAL DESCRIPTION
HPR260 Manual Gas Instruction Manual b-3
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• If chopper current = 1⁄2 of pilot arc current, turn off HF and go to Transfer state.
• If no chopper current after 10 HF pulses, go to Auto Off state with error code (020), “No pilot arc.”
Error checking
• No error checking due to HF noise.
6. Transfer
• If work lead current is > transfer reference current, go to Ramp-up state and turn off pilot arc controller
and pilot arc relay.
• If no transfer after 500 milliseconds, go to Auto Off state with error code (021), “No arc transfer.”
• If chopper current is < 1⁄2 of setpoint, turn on HF.
Error checking
• No error checking due to HF noise.
7. Ramp-up
• If Pierce-complete input is off, then switch to cutflow gases.
• Ramp-up current is based on tables.
• Once chopper current is = or > setpoint, go to Steady state.
Error checking
• Check for coolant flow at power-up (093)
• Check for over/under line voltage (047/046)
• Check for coolant over temperature (071)
• Check for chopper over temperature (065)
• Check for transformer over temperature (067)
8. Steady state
• If Pierce-complete input is off, then switch to cutflow gases.
• If corner-current input is on, then switch to corner-current setpoint.
• If start-signal input is off, then go to Ramp-down state.
Error checking
• Check for loss of phase (027).
• Check for coolant flow at power-up (093)
• Check for over/under line voltage (047/046)
• Check for coolant over temperature (071)
• Check for chopper over temperature (065)
• Check for transformer over temperature (067)
• If chopper current is < 1⁄2 of current setpoint, show current lost error (024).
• If work lead current < 1⁄2 of setpoint, show transfer lost error (026).
9. Ramp-down
• Do current ramp-down according to tables.
• Put gas console into Idle state or Ramp-down state according to tables.
• Once current reaches end current, go to final Ramp-down state.
Error checking
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