Siemens S5-100U - Page 416

Function Modules S5-100U
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.
Figure 15-5. Scanning the Counter Module (500 Hz)
Channel number
Slot address
Counter enable S Q x . 0 Channel “0”
(Set to start value) S Q x . 1 Channel “1”
Counter reset R Q x . 0
R Q x . 1
Scan A I x . 0
“1” = Counter at zero A I x . 1
Timing Diagram
Counting
pulses
1
0
1
0
1
0
6
0
Enable
Output Q
Time
S Q x.0 R Q x.0
Figure 15-6. Timing Diagram: Setting and Resetting an Output of the
Counter Module (500 Hz)
EWA 4NEB 812 6120-02 15-15