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Function Modules
Addressing
A counter module can be addressed like a two-channel digital module (channel "0" or "1"). For
enabling and resetting the counter, you address the module like a digital output module. The
counter reading is scanned in the same way as a digital input module.
Counter enable
(Set to start value)
Counter reset
Scan
"1" = Counter at zero
Timing Diagram
S Q x.0
1
0
1
0
6
0
1
0
Figure 15-6. Timing Diagram: Setting and Resetting an Output of the
EWA 4NEB 812 6120-02
S
Q x . 0
S
Q x . 1
R
Q x . 0
R
Q x . 1
A
I
x . 0
A
I
x . 1
Slot address
Figure 15-5. Scanning the Counter Module (500 Hz)
Counter Module (500 Hz)
Channel "0"
Channel "1"
Channel number
R Q x.0
Enable
Counting
pulses
Output Q
S5-100U
Time
15-15
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