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29
5.6 P06
:
RELAY 2 SET-UP SUB-FUNCTION
Working principle of this part is the same as which of
P05
relay 1 set-up sub-function. Please operate
according to
P05.
done
done
done
done
HOLD
Sp2
U
Sp2
I0.00
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
U
Sp2
I0.00
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
U
Sp2
I0.00
SET
HOLD
Sp2
0I0
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
U
Sp2
I0.00
I0.00
SET
HOLD
Sp2
0I0
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
Sp2
SET
HOLD
ESC
ESC
ESC
ESC
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
ENT
7.00
SPI
ATC
O
C
SP2
I2.00 25.0
MEA
PH
7.00
SPI
ATC
O
C
SP2
I2.00 25.0
MEA
PH
7.00
SPI
ATC
O
C
SP2
I2.00 25.0
MEA
PH
7.00
SPI
ATC
O
C
SP2
I2.00 25.0
MEA
PH
NOTE
:
Set-up value range of hysteresis band under limited control mode is from
0.00
—
2.00PH.
For example, if high point is 7.00pH and hysteresis band is 0.50pH, movement range of the
relay is from 6.50pH to 7.00pH. If low point is 6.00pH and hysteresis band is 0.20pH,
movement range of the relay is from 6.00pH to 6.20pH.
NOTE
:
In PLC control mode, movements of the relay meet following formulas:
C * (VM – VS) * U * T / 14
C
is discriminate parameter for high / low point.
It is -1 when set to high point and it is 1 when set to low point.
VM
is measured value.
VS
is set value.
U
is control parameter.
T
is time constant (represent the whole movement circle of relay)
For example, set high point is 7.00pH, actual measured value is 6.50pH, control parameter is 10, time
constant is 10 seconds.
-1 *
(
6.50-7.00
)
* 10 * 10 / 14 =3.57
second
According to the above formula, pickup time of relay is 3.6 second and release time is 6.4 seconds.
If the result of above formula is negative, relay won’t move. If the result is move than T, relay keeps
picking up until the result is less than T.