Pilz PSS SB HYD, Basic license - Manual (Page 173)

Modular Block System: Hydraulic Presses 6-111
energised mode, i.e. the gate is locked when operating voltage
is applied (
UNLK = 1), is not permitted!
WARNING!
If a short circuit occurs between the guard locking device
control and 24 V, the gate will be unlocked, even if hazardous
machine functions are still being performed! The guard locking
device should therefore be driven via a dual-pole output (e.g.
via the PSS(1) DI2OZ). The dual-pole output will detect a short
circuit with 24 V and shut down safely. The gate will not be
unlocked.
If it is not possible to use a dual-pole output, this error will need
to be excluded by using a separate multicore cable for
controlling the guard locking device, for example.
• SGrd: Status display on the gate
SGrd = 0
: The machine is not enabled ( ENBL = 0)
SGrd flashing: Reset required
SGrd = 1
: Machine is enabled ( ENBL = 1)
• SLck: Status display on the guard locking device
SLck = 0
: Gate is locked
SLck flashing: After a request to open the gate, waiting until
the hazardous machine functions have stopped
or:
After a 1/0 pulse edge at
MRun, waiting until the
hazardous machine functions have stopped
or:
Gate is closed, waiting for a request to lock the
gate
SLck = 1 : Gate is unlocked
INFORMATION
Flashing on the output parameters SGrd and SLck is
determined via the input parameter BLNK. This input should be
assigned a flashing flag.