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Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual User Manual

Page 187

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Publication 1760-UM002B-EN-P - March 2005

Wiring with Pico GFX-70 4-77

• Constants
• Markers MD, MW, MB
• Analog inputs IA01 to IA04

IA01: terminal I7

IA02: terminal I8

IA03: terminal I11

IA04: terminal I12

• Analog output QA01
• Actual value

QV> of another function block

Actual Value

QV>

The actual value

QV> can be assigned the following operands:

• Markers MD, MW, MB
• Analog output QA01

Displaying the Parameter Set in the PARAMETERS Menu

• + Access enabled
• - Access disabled

Contacts

• CF01OF to CF04OF: Actual value ≥ Upper set point
• CF01FB to CF04FB: Actual value ≤ Lower set point
• CF01ZE to CF04ZE: Actual value = Zero

Coils

CF01EN to CF04EN: enable of the counter with coil status = 1.

Memory Requirement of the Frequency Counter

The frequency counter function block requires 40 bytes of memory plus 4
bytes per constant on the function block inputs.

Retention

The frequency counter does not retain actual values, as the frequency is
re-measured continuously.