Siemens Metro 21 M216KA, Руководство оператора

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13-5
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
The counter begins at the loaded value.
In single-pass counting, the counter starts at the loaded value. If the counter
reaches the upper count limit when counting upward and there is then another
count pulse, the counter jumps to the lower count limit and stays there even
when there are additional count pulses.
If the counter reaches the lower count limit when counting downward and
there is then another count pulse, it jumps to the upper count limit and stays
there even when there are additional count pulses.
Upper count limit
Lower count limit
Counter status
Time
Loaded value
Figure 13-5 Single-Pass Upward Counting
Upper count limit
Lower count limit
Counter status
Time
Loaded value
Figure 13-6 Single-Pass Downward Counting
Upper count limit
Lower count limit
Counter status
Time
Loaded value
Gate start Gate stop Gate start
Figure 13-7 Single-Pass Counting with Loaded Value and Gate Function
Single-Pass
Counting
Repeated
Single-Pass
Counting with
Door Function
The 1COUNT40kHz Counter Module