Single-Pass Upward Counting; Single-Pass Downward Counting; Single-Pass Counting With Loaded Value And Gate Function - Siemens Metro 21 M216KA Operator's Manual

Single-Pass
Counting
Repeated
Single-Pass
Counting with
Door Function
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.
Counter status
Upper count limit
Loaded value
Lower count limit
Figure 13-5 Single-Pass Upward Counting
Counter status
Upper count limit
Loaded value
Lower count limit
Figure 13-6 Single-Pass Downward Counting
Counter status
Upper count limit
Loaded value
Lower count limit
Figure 13-7 Single-Pass Counting with Loaded Value and Gate Function
The 1COUNT40kHz Counter Module
Gate start Gate stop Gate start
Time
Time
Time
13-5