57 FY operation manual
Example2
Input signal 4~20mA, range 0~5000, the input signal is nonlinear (as shown in the figure below), use 10 points piece linear
compensation.
PV
5000
2500
0
3750
1250
mA
20124
1
2
3
4
5
6
7
8
9
10
Original Signal
After Piece Linear
Compensation Signal
Step1：SET9.1 = 0 disable function
Step2：SET8.4 = 1 display MLNB、COMP、OFFS
Step3：MLNB = 1, COMP = 0(LSPL), OFFS = 0
Step4：MLNB = 2, COMP = 100, OFFS = 400
Step5：MLNB = 3, COMP = 150, OFFS = 550
Step6：MLNB = 4, COMP = 500, OFFS = 750
Step7：MLNB = 5, COMP = 800, OFFS = 1075
Step8：MLNB = 6, COMP = 1300, OFFS = 1200
Step9：MLNB = 7, COMP = 1900, OFFS = 1225
Step10：MLNB = 8, COMP = 2650, OFFS = 1100
Step11：MLNB = 9, COMP = 3720, OFFS = 680
Step12：MLNB = 10, COMP = 5000(USPL), OFFS = 0
Step13：SET9.1 = 1 enable function
Notes
1. The Piece Linear Compensation function must be enabled (SET9.1=1) when MLNB, COMP, OFFS are set, otherwise the controller
may display an error message.
2. Regardless of the number of use segments, the first segment COMP must be equal to LSPL, the last segment COMP must be
equal to USPL.
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