IFM AL4143 handleiding
Handleiding
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Remote I/O module 16 DI AL4143
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CTb
CT
0
0
t
Main Counter
Batch Counter
4.5.3 Counter mode CTUD
In CTUD (Count Up Down) mode, the counter operates as a simultaneous up and down counter with
overflow and underflow detection.
Behaviour:
• The initial value of the main counter is m = 0. The initial value of the batch counter is b = 0. The
main counter has a threshold value CT. The batch counter has a threshold value CTb.
• If the counter module detects a positive edge at pin 4 of the port, the value of the main counter is
incremented (m = m+1).
• If the counter module detects a positive edge at pin 2 of the port, the value of the main counter is
decremented (m = m-1).
• If the counter module simultaneously detects a positive edge at pin 4 and pin 2 of the port, the
counter value of the main counter does not change.
• If the main counter reaches the threshold value CT (m = CT), the counter value is reset (m = 0).
Due to the overflow detection, the value of the batch counter is incremented (b = b+1).
• If the main counter falls below 0, the counter value is reset to the threshold value (m = CT-1). Due
to the underflow detection, the value of the batch counter is decremented (b = b-1).
• If the batch counter reaches the threshold value CTb (b = CTb), the counter value is reset (b = 0).
• If the batch counter falls below 0, the counter value is reset to the threshold value (b = CTb-1).
CTb
CT
0
0
t
Main Counter
Batch Counter
4.5.4 Counter mode CTDIR
In CTDIR (Count Direction) mode, the counter module operates either as an up counter with overflow
detection or as a down counter with underflow detection. The counting direction can be set.
Behaviour:
• The initial value of the main counter is m = 0. The initial value of the batch counter is b = 0. The
main counter has a threshold value CT. The batch counter has a threshold value CTb.
• The user can determine the counting direction. The counter module initially operates as an up
counter with overflow detection.
• If the counter module detects a positive edge at pin 4 of the port and the counting direction of the
port is set to “up”, the value of the main counter is incremented (m = m+1).
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Productinformatie
| Merk | IFM |
| Model | AL4143 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5317 MB |
