Moeller XIOC, Hardware And Engineering

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Counter module
04/03 AWB2725-1452GB
28
Example of a linear counter, with the functions:
• interrogate comparison value and reference signal
• reset outputs
Ring counter
The counting range is defined by the start and end values, whereby
the start value must be lower than the end value.
As soon as the counter has been enabled, the start value is set and
all incoming pulses will be counted. The following actual values
will be shown, depending on the count direction (up or down).
Example:
• Start value = 10
• End value = 248
An up counter counts up to the end value + 1, and then restarts
from the start value. For a down counter, the next value is the start
value – 1, carrying on to the end value.
As a rule: minimum start value = 0; maximum end value =
FFFFFFFF
hex
.
Parameterizing the comparison value, setting module
outputs
You can set a comparison value, so that an action can be
performed when a defined count value has been reached. The
comparison value must lie between the parameter settings for
start value and end value. It is continuously compared with the
actual value. When equality is achieved, a “Latch” output (=) can
be set. This output is led out directly from the module, for a fast
response. The Equal flag serves as the internal marker for the
“Latch” output. The output and flag remain set until you reset
them.
Figure 39: Example of a linear counter, with the functions “interrogate comparison value and reference signal” and “reset outputs”
742 0 1 364 365 426 742 743
Enable reference
Enable counter
Encoder pulse
Reference
Preset value: 742
Actual value
Enable Latch/Level output
Level output (>)
Latch output (=)
Reset Latch output
Comp. value: 364
Figure 40: Counting range of the ring counter
10 11 12 247 248 249 10 11
10 9 248 247 246 11 10 9
Counting up
Counting down
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