SoftPLC
18-6 | CFW300
18
Where:
y(k):
present output of the PID controller; it may vary from 0.0 to 100.0 %.
i(k-1):
integral value in the previous state of the PID controller.
Kp:
Proportional gain = P931.
Ki:
Integral gain = P932 = [1 / Ti (s)].
Kd:
Differential gain = P933 = [Td (s)].
Ts:
sampling period of the PID controller = P934.
e(k):
present error, being [SP(k) – PV(k)] for direct action, and [PV(k)].– SP(k)] for reverse action.
e(k-1):
previous error, being [SP(k-1) – PV(k-1)] for direct action, and [PV(k-1)].– SP(k-1)] for reverse action.
SP:
present control setpoint of the PID controller.
PV:
process variable of the PID controller, read through the analog inputs (AI1 and AI2).
18.2.3 Parameters
See below the description of the parameters related to the PID controller application.
P100 – Acceleration Time
P101 – Deceleration Time
P133 – Minimum Speed
P134 – Maximum Speed
P221 – LOC Reference Selection
P222 – REM Reference Selection
P231 – AI1 Signal Function
P232 – AI1 Gain
P233 – AI1 Signal
P234 – AI1 Offset
P235 – AI1 Filter
P236 – AI2 Signal Function
P237 – AI2 Gain
P238 – AI2 Signal
P239 – AI2 Offset
P240 – AI2 Filter
P251 – AO1 Function
Summary of Contents for CFW300 V1.3X
Page 2: ......
Page 8: ...Contents...
Page 46: ...Identification of the Inverter Model and Accessories 6 4 CFW300 6...
Page 60: ...Logical Command and Speed Reference 7 14 CFW300 7...
Page 72: ...V f Scalar Control 9 10 CFW300 9...
Page 80: ...VVW Vector Control 10 8 CFW300 10...
Page 116: ...Digital and Analog Inputs and Outputs 12 24 CFW300 12...
Page 132: ...Reading Parameters 15 6 CFW300 15...
