Functional Descriptions; Pv Bias; Function Diagram - Taie FY400 Operation Manual

11. Functional Descriptions

11.1 PV bias

Description
The FY/FA 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 (PV.OS)
Temperature
200°C
198°C
Controller PV
2°C
0°C
Parameter
Parameter Symbol
PVOS
PVOH
Examples
PV bias (PVOS) 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 (PVOS) 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
4 SET6.2
3 PVOS
Fast PVOH
Example 2
PV ratio (PVOH) is a multiplier to be applied 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, if Controller B is compensated by the PV ratio (PVOH), then the PVOH parameter value is adjusted to display
at 200°C. Consistent with Controller A, Controller B will show 0°C at 0°C.
Parameter Setting
Level Parameter Set value
4 SET6.2
3 PVOS
Fast PVOH
FY operation manual
Sensor PV
PVOS=+2°C
Content
PV bias(for zero)
PV = PV + PVOS
PV bias(for span)
PV = PV x (PVOH / 5000) + PVOS
1
5
5000 PV ratio unchanging
1 Display PVOS / PVOH
0 PV bias unchanging
5129 PV ratio=(5129/5000)=1.0258
Temperature
200°C
198°C
Controller PV
0°C
time
Controller PV=Sensor PV
Range
MAX MIN
199.9 -199.9
9999 0
Description
Display PVOS
PV adds +5°C
Description
PV ratio (PV.OH)
PVOH=5051
Adjust Controller PV
Sensor PV
Default Level
0 Level 3
5000 Fast
time
Hide/
Display
SET6.2
SET6.2
40