11. Functional Descriptions
11.1 PV bias
Description
The FY series controller offers PV bias for input calibration, PV bias functions correct
the deviation of each sensor, as well as PV difference between controllers.
Function Diagram
PV bias
Temperature
200
°
C
198
°
C
Controller PV
Sensor PV
PVOS=+2
°
C
2
°
C
0
°
C
time
Parameter
Parameter
Symbol
Content
Range
Default
Level
Hide/
MAX
MIN
Display
PVOS
PV bias
100.0
-100.0
0
Level 3
SET6.2
PV = PV + PVOS
Examples
PV bias (PV.OS) adds bias to the Measured value(PV):
When two controllers measure the temperature of the same type of load, the measured values of the respective characteristics
of the sensors are displayed as
Controller A : 200°C
Controller B : 195°C
As shown above, Controller B is compensated by PV offset (PV.OS) The PV.OS parameter value must be corrected by +5°C.
The display value will be changed to 200°C, Same as Controller A, but Controller B will show 5°C at 0°C.
Parameter setting
Level Parameter
Set value
Description
4
SET6.2
1
Display PVOS
3
PVOS
5
PV adds +5°C
FY/FU operation manual
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