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Counting Direction
CNT1:
CNT2:
CNT3:
n+24
n+29
n+34
3-5
Output Control
Output Control Mode
General Setting:
For every Counter the (up or down) counting direction is indicated and can be
used in the Ladder Program.
CNT4:
15 14 13 12 11 10 9 8
n+39
The Reset, Preset, Capture and Z-signal Activated Bits are ON for exactly one PLC-cycle after
the occurrence of a (short) pulse which was detected since the previous I/O Refresh.
The 32 Outputs of the High-speed Counter Unit can be controlled automatically in
two ways:
•
Range Mode. In Range Mode you can define up to a maximum of 32 Ranges
per Counter. The Outputs are controlled according to the Counter Value being
within Range Limits. For a detailed description about Range Mode refer to 3-5-
1 "Range Mode".
•
Comparison Mode. In Comparison Mode you can define up to a maximum of
32 Comparison Values per Counter. The Outputs are controlled according to
the direction in which the Counter Value crosses the Comparison Value. For a
detailed description about Comparison Mode refer to 3-5-2 "Comparison
Mode".
If the Unit is configured for Range Mode all four Counters will operate in Range
Mode. If the Unit is configured for Comparison Mode all four Counters will operate
in Comparison Mode.
Besides automatically, the Digital Outputs can also be controlled manually (refer
to 3-5-3 "Manual Output Control").
15 14 13 12 11 10 9 8
m
7
6 5
4
3
2
1 0
7
6 5
4
3
2
1 0
Section 3-5
Gate Open/Closed:
0 = Gate Closed
1 = Gate Open
Counting Direction:
0 = Counter counts down
1 = Counter counts up
Preset Activated:
ON for exactly one PLC-cycle
Reset Activated:
ON for exactly one PLC-cycle
Capture Activated:
ON for exactly one PLC-cycle
Z-signal Activated:
ON for exactly one PLC-cycle
Output Control Mode:
0 = Range Mode
1 = Comparison Mode
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