WEG CFW100 Programming Manual page 140

APPLICATIONS
Seq. Action / Result
1 It selects the PID controller application in the SoftPLC function of the inverter
2 It enables the execution of the PID controller application
It selects the PID controller control action, thus enabling its operation and uploading, at this moment
3
the application default setting (which is indicated below) to the frequency inverter. 1 = Direct
4 Acceleration time in seconds
5 Deceleration time in seconds
6 Minimum motor speed in rpm
7 Maximum motor speed in rpm
It selects the parameter of the HMI main display to show the value of the PID controller process variable
8
This setting is optional
It selects the HMI bar graph parameter to show the present motor speed.
9
This setting is optional
10 Full scale of the Speed Reference
11 Engineering unit of the Speed Reference
12 Speed Reference indication form
13 Full scale of the HMI bar graph
14 LOC/REM Source Selection. 0 = Always Local
15 Selection of the Reference in Local mode. 12 = SoftPLC
16 Selection of the Run/Stop Command in Local mode. 1 = DIx
17 AI1 Signal Function. 17 = Process Variable (PV)
18 AI1 Gain
19 AI1 Signal. 1 = 4 to 20 mA
20 Offset AI1
21 Filter AI1
22 Digital input DI1 is used for the motor run or stop command. 1 = run/stop
23 Digital input DI2 is used to set the PID to Automatic or Manual. 50 = PID Man / Auto
SoftPLC Engineering Unit. 0 = none. The sensor of the process variable is in bar, and this
24
variable is not available on the inverter
25 Indication form of the SoftPLC engineering unit. 2 = wx.yz
26 It selects the PID controller operation mode. 2 = manual/automatic via DI2
27 It selects the automatic setting mode of the control setpoint. 0 = P911 inactive and P918 inactive
28 The PID controller Setpoint will be set via HMI. 0 = via HMI
29 The PID Process Variable will be read via analog input AI1. 1 = via AI1
The range of the sensor connected to analog input AI1 is 0 to 4.0 bar. Program this parameter for
30
the minimum sensor value, which is the maximum of the analog input 4 mA
The range of the sensor connected to analog input AI1 is 0 to 4.0 bar. Program this parameter for
31
the maximum sensor value, which is the maximum of the analog input 20 mA
32 Setting of the control Setpoint via HMI
33 Control Setpoint Filter
34 PID controller Sampling Period
35 Proportional Gain of the PID controller
36 Integral Gain of the PID controller
37 Derivative Gain of the PID controller
Parameters P931, P932, P933 and P934 must be set according to the response of the process to be controlled.
See below suggestions for initial values of sampling time and gain setting for the PID controller according to the
process to be controlled.
Pressure in pneumatic system
Flow in pneumatic system
14
Pressure in hydraulic system
Flow in hydraulic system
Temperature
14-4 | Micro Mini Drives
Table 14.2: Programming sequence of the PID controller application
Table 14.3: Suggestions for the PID controller gain settings
Sampling Time
Quantity
P934
0.10 s
0.10 s
0,10 s
0.10 s
0.50 s
Gains
Proportional P931 Integral P932
1.00 5.00
1,00 5.00
1.00 5.00
1,00 5.00
2.00 0.50
Indication on the
Display
P903 = 1
P901 = 1
P928 = 1
P100 = 2.5 s
P101 = 2.5 s
P133 = 40.0 Hz
P134 = 60.0 Hz
P205 = 916
P207 = 002
P208 = 600
P209 = 3
P210 = 1
P213 = 600
P220 = 0
P221 = 12
P224 = 1
P231 = 17
P232 = 1.000
P233 = 1
P234 = 0.00 %
P235 = 0.25 s
P263 = 1
P264 = 50
P510 = 0
P511 = 2
P929 = 2
P930 = 0
P920 = 0
P921 = 1
P922 = 0.00
P923 = 4.00
P911 = 2.00
P935 = 0.150 s
P934 = 0.100 s
P931 = 1.00
P932 = 5.00
P933 = 0.00
Derivative P933
0.00
0.00
0.00
0.00
0.10