IDEC SmartRelay functions
220 IDEC SmartRelay Manual
Note
For further information on the controller basics please refer to the
online help for WindLGC.
The updated value PV is used to calculate in the formulas:
Updated value PV = (PV•gain) + offset
• If the updated value PV = SP, then the special function
does not change the
value of AQ.
• Dir = upwards (+) (timing diagram numbers 1. and 3.)
- If the updated value PV > SP, then the special function
reduce
s the value of AQ.
- If the updated value PV < SP, then the special function
increases the value
of AQ.
• Dir = downwards (-) (timing diagram number 2.)
- If the updated value PV > SP, then the special function
increases the value
of AQ.
- If the updated value PV < SP, then the special function
reduce
s the value of AQ.
With a disturbance, AQ continues to increase / decrease
u
ntil the updated value PV again corresponds to SP. The
speed with which AQ changes depends on the parameters
KC and TI.
If the input PV exceeds the parameter Max, then the updated
value PV is
set to
the value of Max. If the PV falls short of the
parameter Min, then the updated value PV is set to the value
of Min.
If the input R is set to 1, then th
e AQ outpu
t is reset. As long
as R is set, the input A/M is disabled.
Sampling time
The sampling time is fixed at 500 ms.
Parameter sets
For more information and application examples with
a
pp
lication-related parameter sets for KC, TI and Dir refer to
the online help for WindLGC.
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