Function of the frequency counter function block – Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual User Manual

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Publication 1760-UM002B-EN-P - March 2005

4-78 Wiring with Pico GFX-70

Function of the Frequency Counter Function Block

Figure 4.32 Signal diagram of frequency counter

1: counter input I1 to I4

2: upper set point value

>SH

3: lower set point value

>SL

4: enable CF..EN

5: contact (make contact) CF..OF upper set point value exceeded

6: contact (make contact) CF..FB lower set point value undershot

7: actual value equal to zero CF..ZE

t

g

: gate time for the frequency measurement

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