SOFTWARE FUNCTIONAL DESCRIPTION
b-2 HPR400XD Manual Gas Instruction Manual
• After delay, wait for CAN watchdog message from the gas console.
• After CAN watchdog messages have been received, send a CAN reset message to the gas console and
go to the Purge state.
Error checking
• Verify that Start signal is off (050).
• Check for coolant flow at power-up (109).
• Check for no chopper current on all choppers (102, 156, 157, 158).
• If no CAN watchdog message after 6-second delay, report error “UNKNOWN GAS CONSOLE” (133).
2. Purge
• Turn on coolant pump or motor.
• Gas console runs preflow gases for 12 seconds.
• After preflow cycle is done, verify coolant flow.
• Gas console runs cutflow gases for 12 seconds.
• Verify that the Plasma Start signal is off before going to Idle2 state.
Error checking
• If coolant flow rate is less than 1.1 lpm (0.3 gpm) (093), shut down the system.
• If coolant flow rate is less than 2.2 lpm (0.6 gpm) (060), continue pumping coolant until flow is above
2.2 lpm (0.6 gpm), with no start allowed at this time.
• Perform chopper test on all choppers
3. Idle2
• If Start signal is active, the gas console goes into Preflow state, the contactor and the soft-start
controller turn on, and system goes into Preflow state.
• If the gas console or serial interface requests a state change, take action.
• After more than 10 seconds since the last Start signal, turn off the contactor and soft-start controller.
Error checking
• Check for coolant flow at power-up (093).
• Verify that all temperatures are below the specified temperature limits.
4. Preflow_IHS
• Chopper setpoint = pilot arc current.
• Wait for preflow to finish (0.75 seconds) and for the Hold signal to be removed.
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 on all choppers (065, 066, 073, 074).
• Check for transformer over temperature (067).
5. Pilot Arc
• Turn on pilot arc controller and pilot arc relay.
• Pulse HF after 50-millisecond delay to allow pilot arc relay to close.
• If chopper current = 1⁄2 of pilot arc current, turn off HF and go to Transfer state.