Pilz PSS SB HYD, Basic license - Manual (Page 278)

8-42
Examples
Modular Block System: Hydraulic Presses
ESPE/AOPD in single break mode with cycle reset via a pulse at top
dead centre (TDC)
Block used: SB068/BWS_AOS
Set operating mode:
The following mode is set for this application:
OFF = 0 ESPE/AOPD in single break mode
GdO = 0 Enabled via a single interruption to the ESPE.
SBrk = 1 The signal must come from a connected operating mode
DBrk = 0 selector switch block (e.g. SB051).
SSeq = 0 Start-up disabler / function test
Cycle reset:
In this example, the cycle is reset via a pulse at top dead centre.
Sequence:
• Cycle reset
Once the cycle is reset (resetting the cycle counter), the pulsed output
(output parameter
RdCy) will change from a 0-signal to a 1-signal.
• Start the next cycle
If RdCy = 1, the next cycle can be started by accessing the protected
field.
DANGER!
The reset lock must be active throughout the duration of the potentially
dangerous movement.
The input parameter
ARSt should be assigned a static 0-signal (RLO-0).
This will activate the reset lock if the protected field is accessed during a
potentially dangerous movement.