Pilz PSS SB HYD, Basic license - Manual (Page 126)

6-64 Modular Block System: Hydraulic Presses
Standard Function Blocks
• Reset lock:
A reset lock will be set if the protected field is broken during operation.
The lifting of the reset lock will depend on the set reset procedure. The
reset sequence is established via the input parameter
ARSt (automatic
reset/press reset button).
In the case of hardware errors you will need to reset first and then carry
out a function test.
• Automatic test of ESPE/AOPD:
This block can be used to carry out an automatic function test (input
parameter
Test). A break in the protected field is simulated by switching
off the ESPE/AOPD emitter (output parameter TEST). The maximum
permitted duration of the whole test on type 2 ESPE/AOPDs is 150 ms
(EN 61 496-1, see also SB070/DW 1006).
DANGER!
In “Guard only” mode, the automatic function test of the ESPE/AOPD
must only be carried out via the input parameter
Test at a time when the
guard function of the ESPE/AOPD will not be called upon.
INFORMATION
If an external switch is used to trigger the automatic function test of the
ESPE/AOPD, the feasibility and function of this external switch must be
tested by the user.
• Cycle mode:
The ESPE/AOPD can be enabled (output parameter ENBL) by means of
a single or double break of the ESPE/AOPD (single or double break
mode). The enable is reset using
CyRs = 0/1-pulse edge (e.g. at top
dead centre TDC).
• Monitoring cycle time:
After max. 30 s (see also SB 070/DW 1005), automatic start of the
machine in cycle mode will no longer be possible. A restart can only be
achieved via the established sequence set at the input parameter
STyp
(see “Cycle modes”). The enable criteria will depend on the set operating
mode.
• Switching the ESPE/AOPD supply voltage:
The block has an output for switching the supply voltage to the ESPE/
AOPD (output parameter
PWR).
SB068