Function blocks
151
1SVC 440 795 M1100
• Timing relay,
– On-delayed,
– On-delayed with random switching,
– Off-delayed, also retriggerable
– Off-delayed with random switching, also retriggerable
– On- and off-delayed
– On- and off-delayed with random switching,
– single pulse,
– synchronous flashing,
– asynchronous flashing,
• Set cycle time
• Value limitation
The following applies to function blocks:
h
The most recent actual values are cleared if the power
supply is switched off or if the display system is switched
to STOP mode. Exception: Retentive data keeps its state
(a section “Retention”, page 363).
The most recent actual values are transferred to the
operands every cycle. The data function block is an
exception.
h
Caution!
The following applies to RUN mode: The display system
processes the function block after it passes through the
circuit diagram. The last state of the coils is used for this.
h
If you want to prevent other people from modifying the
parameters, change the access enable symbol from + to –
when creating the circuit diagram and setting parameters.
You can then protect the circuit diagram with a password.
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