IDEC SmartRelay functions
IDEC SmartRelay Manual 169
Timing diagram
Functional description
The frequency trigger measures the signals at input Fre. The
pulses a
re recorded across a configurable time G_T.
Output Q is set and reset in accordance with the set
thresholds
. See the calculation rule below.
Calculation rule
• If the On threshold Off threshold, then:
Q = 1, if f
a
> On
Q = 0, if f
a
≦ Off.
• If the On threshold < Off threshold, then:
Q = 1, if On ≦ f
a
< Off.
Setting the Par parameter
Note
The system scans the counter limit value once per interval G_T.
View in programming mode (example):
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