Function description
Operating Manual PNOZ s30
1001715-EN-19
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5.3.5 Direction
If the direction is to be detected safely, this function must be linked to a safety contact.
} Clockwise
If "Direct. Right" is configured, the safety output is switched on during normal operation in
clockwise rotation.
} Counter-clockwise
If "Direct. Left" is configured, the safety output is switched on during normal operation in
anti-clockwise rotation.
} Tolerance
For both directions, a tolerance can be entered for the wrong direction. This means that
the drive may run in the incorrect direction until it reaches the set tolerance value without
the assigned output switching off.
A switched off output cannot switch on again until the drive has moved up to the toler-
ance value in the correct direction.
The tolerance is also taken into account following an automatic reset.
} Automatic reset
For both directions, a joint automatic reset can be configured.
– If no automatic reset is configured, the direction monitoring is reset only by switching
off the supply voltage.
– When automatic reset is configured, the direction monitoring is reset when a para-
meter set is switched over.
Please note:
} Direction monitoring is always active, irrespective of whether it is used in the selected
parameter set.
} Direct.Right and Direct.Left are active when the PNOZ s30 is started up.
} Direction cannot be detected if proximity switches are used.
Timing diagram for direction monitoring:
UB
Direction
s
Direct.Right
Right
Left
Standstill
Direct.Left
s
s
0 0 0 0...
0 0 0 1 2 3 4 4 ...
1 2 3 4 4 ...
3 2 1 0 0 ...
3 2 1 2 1 0 0 ...
1 2 3 2 3 4 4 ...
1 2 3 3 ... 4 4 ... 4 4 ... 3 2 1 0 0 ...
Wrong
direction:
Wrong
direction:
s
3 2 1 1 1 ...
0 0 ...
0 0 ... 1 2 3 4 4 ...
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