Function blocks
193
1SVC 440 795 M1100
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
• CH01OF to CH04OF: Actual value f Upper setpoint
• CH01FB to CH04FB: Actual value F Lower setpoint
• CH01ZE to CH04ZE: Actual value = Zero
• CH01CY to CH04CY: Value range exceeded
Coils
• CH01EN to CH04EN: Enable of the counter
• CH01D to CH04D: Count direction definition,
Status 0 = Count upwards, Status 1 = Count downwards
• CH01RE to CH04RE: Reset actual value to zero
• CH01SE to CH04SE: Accept preset actual value with rising
edge.
Memory requirement of the high-speed counter
The high-speed counter function block requires 52 bytes of
memory plus 4 bytes per constant on the function block inputs.
Retention
High-speed counter relays can be operated with retentive
actual values. The number of retentive counter relays can be
selected in the SYSTEM r RETENTION menu.
If a counter relay is retentive, the actual value is retained
when the operating mode changes from RUN to STOP as
well as when the power supply is switched off.
h
The actual value is only cleared in RUN mode with a
specific reset signal.
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