Weld Circuit Degradation; Input „Ghost Shift; Input "Global Adaptive Off - Bosch Rexroth PSI 6C 120 Serie Bedienungsanleitung

R911173645 | PSI 6xCx.120 xx
Discrete output
"Close Weld Contactor"
The input will be checked after opening the Weld Contactor.
If input is not off in 200 milliseconds, a fault will occur. Error message "Weld
Contactor Did Not Open".
The Weld Contactor Output will be set with the receipt of a program start (internal
or external), if ignition is set.
Output Close Weld Contactor will stay energized until
• either a fault occurs,
• or E-Stop occurs,
• or a timeout occurs.
A timeout is defined as a period of time with no receipt of a "Start" signal. The
timeout is set for 60 seconds.
7.1.3

Weld Circuit Degradation

If the functionality "Weld Circuit Degradation" is enabled, the controller cross-
checks at the end of each weld schedule with weld on the weld current-to-phase
angle ratio to a programmable reference value.
Is the actual value out of a programmable tolerance, the controller generates an
error message.
To have this functionality running reliably, even at a nominal value change, e.g.
readjustment, the actual current value will be projected to a max value of 100% of
the power based on the actual phase angle for a start, and then compared with
the reference value of a 100% power.
Due to an influence of the fluctuations in mains voltage on this value also, the
tolerance band needs to be bigger than the system immanent fluctuations in
mains voltage.
This function can be switched on or off for each electrode (gun).
7.1.4 Input „Ghost shift"
Principally the timer doesn't increase the wear counters, as long as we run
without current.
In case of an active Input "Ghost Shift" the timer will turn off the current but still
increment the counters for sequences without current. This can be used to review
the electrode management.
Caution:
At the end of the Ghost Shift mode the operator has to guarantee by tip dressing
or tip changing, that the wear counters meet the real wear of the electrodes.
Otherwise there will be problems with the stepper mode and/or the dynamic
tolerance bands in UIR-mode.
7.1.5

Input "Global Adaptive Off"

An active input forces programs with UI-measuring, UI-regulation and/or UI-
monitoring a sequence in KSR-measuring, KSR-regulation and/or KSR-
monitoring without a reprogramming.
The input is level-active, for a normal operation it must be always low.
Bosch Rexroth AG 33/41
Features