Positioning
IP 240
Switching the IP outputs during reference point approach (HAND=0)
The switching performance of the IP outputs specified when the channel was configured is taken
into account during reference point approach.
a) DAV=0 (switch outputs separately)
After the outputs have been enabled (FREI=1), IP output D1 is set.
When the preliminary contact signal is reached (positive edge at the IN input), output D1 is
reset and output D2 set. D2 is reset when the reference point is reached.
b) DAV=1 (switch outputs collectively)
After the outputs have been enabled, both D1 and D2 are set.
When the preliminary contact signal is reached, output D1 is reset; output D2 is reset when
the reference point is reached.
Positive direction of travel
Output
D1
Positive direction of travel
Control bit
HASY
Control bit
FREI
Z pulses
Status bit
SYNC
a a a a a a a a
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a a a a a a a a a a a a a a a a a a a a a
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a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a
Prior to transfer
of HASY=1
a a a a a a a a
a a a a a a a a
a a a a a a a a
a a a a a a a a
a a a a a a a a
IN signal
Output
D2
Reference
point
Reference
point
Fig. 10-23b.
Switching of the IP Outputs
during Reference Point
Approach when DAV=1
Fig. 10-23a.
Switching of the IP Outputs
during Reference Point
Approach when DAV=0
Note
Only output D2 is set if the IN signal is already active at the start of reference point
approach.
10-42
EWA 4NEB 811 6120-02a