13-24
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
Enable gate
Stop gate
EW 0 = ”loaded value” + 20
A 4.0 = 1
20 pulses, for example, arrive at
the input of the counter (A)
EW 0 = ”loaded value”
Another 10 pulses arrive at the input of the counter (A). As
a result, the comparison value is exceeded in this example.
EW 2 = ”comparison value”
(in this example: ”loaded value” + 25)
Current count =
”loaded value” + 30
Set comparison value =
”comparison value”
E 4.2 = 1
After 500 ms
E 4.2 = 0
A 4.0 = 0
Another 50 pulses arrive at the in-
put of the counter (A)
EW 0= ”loaded value” + 30
EW 2 = ”comparison value”
Current count =
load value
Set comparison value =
”comparison value”
Current count = loaded
value + 20
Output is set for 500 ms
Do not accept the comparison
value
This is the earliest point at which the
comparison value AW 2 can be changed
A 4.3 = 0
Yes
Comparison
value
not accepted?
E 4.5 = 0
No
Figure 13-21 Example 2, Continued
The 1COUNT40kHz Counter Module