IDEC SmartRelay functions
4.3 Special functions
Parameter inputs
At some of the inputs you do not apply any signals. You configure the relevant block values
instead. Examples:
•
Par (Parameter):
You do no connect the Par parameter. Instead, you set the relevant blcok parameters
(times, on/off thresholds etc.).
•
Priority:
This is an open input. Here, you define priorities and specify whether a message is to be
acknowledged in RUN.
4.3.2
Time response
Parameter T
You can configure a time value T for some of the SF blocks. When you preset this time, note
that your input values are based on the timebase set:
Timebase
s (seconds)
m (minutes)
h (hours)
The IDEC SmartRelay FL1F-specific Stopwatch (Page 166) function provides an additional
timebase - 10 ms.
Accuracy of T
Because of slight tolerances in the characteristics of electronic components, the set time T
can deviate. You can find a detailed description of such deviations in the On-delay (Page
132).
Accuracy of the timer (Seven-day/twelve-month time switch)
To prevent timing inaccuracy of the real-time clock in C versions (IDEC SmartRelay devices
with an integrated real-time clock) caused by this deviation, IDEC SmartRelay continuously
compares the timer value to a high-precision timebase and makes continual corrections. The
resultant maximum timing inaccuracy is ±2 s/day.
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_ _ : _ _
1
seconds :
/
seconds
100
minutes : seconds
hours : minutes
IDEC SmartRelay Manual