CDE360 Vector Control AC Drive Chapter 6 Parameters Description
E5.03
equals to 0% in PID regulator,and
E5.02
equals to 100%.That two points (
E5.03
,0.0%)
and (
E5.02
,100.0%) determine a conversion line between the value with engineering unit and
percentage,as shown in the following figure.
Example 1:
E5.00(Engineering unit)= 1(MPa)
E5.01(PID engineering unit resolution)= 3(Three decimals)
E5.03(Minimum setting of PID engineering unit)= 0.000(MPa)
E5.02(Maximum setting of PID engineering unit)= 8.000(MPa)
E5.05(PID digital setting)= 3.040(Mpa)
E5.04(PID setting source)= 0(E5.05+UP/DOWN)
The final PID setting with percentage as unit is:
(E5.05-E5.03)/(E5.02-E5.03)*100% = 38.0%
A0.20(PID reference) is the final PID setting with engineering unit,its value is:
3.040 MPa = 38.0% * (E5.02-E5.03) + E5.03
%
100%
0.0%
Engineering
unit
E5.02
E5.03
Figure 6- 35 The relationship between the value with engineering unit
and the percentage value in AC drive PID regulator
Example 2:
E5.00(Engineering unit)= 1(MPa)
E5.01(PID engineering unit resolution)= 3(Three decimals)
E5.03(Minimum setting of PID engineering unit)= 0.000(MPa)
E5.02(Maximum setting of PID engineering unit)= 8.000(MPa)
E5.07(PID feedback source)= 0(AI1)
The max measure range of external equipment is 8 MPa,which equals to 16 mA of AI
signal.
C2.03(AI curve selection)= 321(set AI1 to AI curve 1)
C2.06(AI curve 1 maximum input)= 8.00V
C2.07(Corresponding setting of AI curve 1 maximum input)= 100.0%
Suppose the AI current is 10mA
Then PID feedback with percentage unit is: (10mA-0mA)/(16mA-0mA) * 100% = 62.5%
A0.21(PID feedback) is the final PID feedback with engineering unit,its value is:
5.000(MPa) = 62.5% * (E5.02-E5.03) + E5.03