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5 Function blocks
5.9 CI, High-speed incremental value counter
176
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
Output
QV:
Actual value output CI..QV outputs the current actual value as an
integer. You can assign the following operands to output
…
QV:
•
Analog output QA01.
•
Markers MD, MW, MB.
Retention
The counter can be operated with retentive actual values. The number of
retentive counters is selected in SYSTEM RETENTION.
If a meter is retentive, the actual value is retained when the operating mode
changes from RUN to STOP as well as when the supply voltage is switched
off.
If a easy800 is started in RUN mode, the counter operates with the
retentively saved actual value.
Function of the function block
→
The actual value can only be cleared in RUN mode with a Reset
signal.
Memory
52 + per
4 Byte/Constant at function block input
Cycle time [
μ
s]
easy800 standard
easy800-SWD
47
12
→
The incremental counter evaluates the rising and falling edges
and counts twice the number of pulses. This prevents too many
or too few pulses from being counted if there is oscillation on a
signal edge. If the number of pulses are required, divide the
value by two.