9-16
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
S
Q
x.0
Channel “0” ; Counter Enable
S
Q
x.1
Channel “1” ; (Set to Start Value)
R
Q
x.0
; Counter Reset
R
Q
x.1
;
A
I
x.0
; Scan
A
I
x.1
; “1” = Counter at Zero
Channel Number
Slot Address
Figure 9-5 Scanning the Counter Module (500 Hz)
Counting
Pulses
1
0
Enable
Time
R Q x.0
S Q x.0
1
0
1
0
Output Q
6
0
Figure 9-6 Timing Diagram: Setting and Resetting an Output of the Counter Module
(500 Hz)
Timing Diagram
Function Modules