IDEC SmartRelay functions
123
IDEC SmartRelay Manual
4.3.2 Time response
Parameter T
At some of the SFs it is possible to configure a time value T.
When you preset this time, note that your input values are
based on the timebase set:
Timebase
B1 +
T =04:10h
Setting a time T of 250 minutes:
Unit in hours h:
04:00 hours 240 minutes
00:10 hours +10 minutes
= 250 minutes
Note
Always specify a time T in ≥ 0.02 s. The time T is not defined for T
< 0.02 s.
Accuracy of T
Because of slight tolerances in the characteristics of
electronic components, the set time T may deviate. IDEC
SmartRelay has a maximum tolerance of ± 0.02%.
When 0.02% of the time T is smaller than 0.02 seconds, the
maximum deviation is 0.02 seconds.
Example:
The maximum tolerance per hour (3600 seconds) is ±0.02%,
which is proportional to ± 0.72 seconds.
The maximum tolerance per minute (60 seconds) is ± 0.02
seconds.
Accuracy of the timer (Seven-day/Twelve-month time switch)
To prevent timing inaccuracy of the real-time clock in C ver-
sions caused by this deviation, the timer value is continuous-
ly compared with a high-precision timebase and corrected.
The resultant maximum timing inaccuracy is ± 5 s/day.
_ _ : _ _
s (seconds) seconds :
1
/
100
seconds
m (minutes) minutes : seconds
h (hours) hours : minutes
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com
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