Operative mode
Operating modes
Item No.: 099-008225-EWM01
25
5.5 Operating
modes
There are 2 different operating modes available.
It is necessary to define the program sequence in order to understand the operating modes. The program
sequence describes a series of welding program steps which are processed in sequence, starting with
ignition, and ending with the end of the welding process.
Start/Stop signal
Signal=1 starts the system, 0 ends the welding process. Depending on the operating mode selected, the
process is ended immediately (non-latched) or following an end program (non-latched special).
Gas pre-flows/gas post-flows
Defined connection or shut-down of the process gas supply at the start and after the welding process.
Start program
Special program which becomes active in the relevant operating mode (non-latched special) once the gas
pre-flows and ignition phase are complete. This program can be assigned a separate wire feed speed,
voltage correction and a dynamic value.
Main welding program P2.x
The main welding program operation follows the completion of the start program/ignition phase
(depending on the operating mode)
Reduction program P3
This program is used in the “Superpulses” welding type for the PHOENIX and for the “Thermal pulses”
type for the TETRIX. It is activated alternately with the main welding program currently active and an
adjustable frequency is activated during the changeover. This permits special control by reducing the
power for the time in which the secondary program is running.
End program
Special program which initiates the conclusion of the welding process after the main welding program.
This is activated after the end program ramp time elapses (only with the non-latched special operating
mode).
Wire burn-back
Defined burn-back of the welding wire at the end of the welding process (can be defined as part of a
JOB). Only of relevance for MIG/MAG processes.
I > 0 signal
Feedback signal for indicating “Current flows” and final, stable burn phase. It is generally used to trigger
the positioning device.
5.5.1
Non-latched operation
Gas pre-flows are initiated when the start signal is issued. The ignition program is activated once these
are complete. Following successful ignition, the power source is in main welding program P2.x (according
to the setting in the program), and the signal I>0 is set.
If a Stop is issued, wire burn-back and gas post-flows are activated in sequence and the welding process
is ended; I>0 is cancelled once the arc has been extinguished.
5.5.2
Special, non-latched
Gas pre-flows are initiated when the start signal is issued. The ignition program is activated once these
are complete. Following successful ignition, the power source will be in the ignition program; the signal
I>0 is set. This runs for the time specified in the JOB and activates the main welding program P2.x
(according to the setting in the program).
If a Stop is issued, first the end program is activated, followed by the wire burn-back and gas post-flows,
and the welding process is ended; I>0 is cancelled once the arc has been extinguished.
The transitions from ignition program to the main program and from the main program to the end program
are controlled via ramps, where the output is carried over from one program to another.
The operating modes can now also be switched over during welding operation from software
version 01. This means that the non-latched special mode can be modified in a flexible way.
