Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 186)

Publication 1760-UM002B-EN-P - March 2005
4-76 Wiring with Pico GFX-70
Wiring of a Frequency Counter
You integrate a frequency counter into your circuit in the form of a contact
and coil. The counter relay has different coils and contacts.
Figure 4.31 Pico GFX-70 circuit diagram with frequency counter
Parameter display and parameter set for frequency counter:
In the parameter display of a counter relay you change set point values and/or
the preset value and the enable of the parameter display.
Value Range
The function block operates in the integer range from 0 to 5000
1 kHz 1 = 1000
Behavior when value range is exceeded
The value range cannot be exceeded as the maximum measured value is less
than the value range.
Inputs
The function block inputs
>SH
and
>SL
can have the following operands:
IMPORTANT
To prevent unpredictable switching states, use each coil of a
relay once only in the circuit diagram. Use a counter input
for the CF, CH, CI counters only once.
I 05---------------------------[ CF01EN
CF01OF-------------------------[ Q 01
CF01FB-------------------------[ Q 02
CF01ZE-------------------------[ Q 03
CF01 -
>SH
>SL
QV>
CF01 Frequency counter function block number 01
- Does not appear in the parameter display
>SH Upper set point
>SL Lower set point
QV> Actual value in RUN mode