Function description
Operating Manual PSENvip R, PSENvip R LR,PSENvip E
1003449-EN-06
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4.8
System cycle base version
This section illustrates the interdependencies of the parameters on the press brake, the
base version and the control system PSSu PLC during a press stroke. The upward move-
ment of the press is assumed as a safe movement. The following signals and states are
considered:
}
OSSD signal: The PSSu K F FAU calculates the status of the protected field from the im-
age data on the receiver and generates an OSSD signal. The OSSD signal controls the
outputs of the PSSu K F FAU. If the protected field is clear, the OSSDSignal is 1. It
switches to 0 if the protected field is interrupted.
}
Creep speed mode: Signal that indicates creep speed mode to the safety system.
}
Status of protected field: Free, interrupted
}
Signal System-Init: If the CNC signals to the PSSu K F FAU B that the press brake is at
top dead centre or in an upward movement, System-Init = 1.
}
Signal from foot switch: The press stroke is started by operating the foot switch, the sig-
nal is 1. If the foot switch is released, the signal switches to 0 and the press stops.
}
Closing speed v
TDC
SG
BDC
v = 0
v > 10 mm/s
v
£
10 mm/s
v = 0
Fig.: Definitions
Legend:
}
TDC: Top dead centre
}
SG: Creep speed mode signal
}
BDC: Bottom dead centre
}
v = 0: Closing speed at top/bottom dead centre
}
v > 10 mm/s: Closing speed in rapid traverse
}
v ≤10 mm/s: Closing speed in creep speed mode
