Siemens SIMATIC FM 450-1 Manual page 85

Edge-Controlled Figure 9-5 shows edge-controlled opening and closing of the hardware gate
Opening and
of counter 1.
Closing of the
Hardware Gate
Input 1I0
Input 1I1
Figure 9-5
In the case of the edge-controlled gate function, the hardware gate of counter
1 is opened by a positive edge at input 1I0. The gate is closed by a positive
edge at input 1I1.
In the event of positive edges occurring simultaneously at inputs 1I0 and 1I1,
an opened gate is closed or a closed gate remains closed. If input 1I1 is set, a
positive edge at input 1I0 cannot open the gate.
The same applies analogously for counter 2 (inputs 2I0 and 2I1).
Status of Inputs The status of the inputs 1I0 (2I0) and 1I1 (2I1) are indicated by the green
1I0 (2I0) and LEDs CH1 IN 0 (CH 2 IN 0) and CH 1 IN 1 (CH 2 IN 1) and within the user
1I1 (2I1) program in bit STS_STA and STS_STP of the DB of the FC CNT_CTRL.
FM 450-1 Counter Function Module
C79000-G7076-C450-01
www.gkbpx.com
Operating Modes, Settings, Parameters and Commands
Count pulses
Edge-Controlled Opening and Closing of the Hardware Gate of Counter 1
Counter status
1 2 3 4
Open gate
Close gate
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