WEG CFW100 - Application 4 - Analog Input with Dead Zone

15
APPLICATION EXAMPLES
15.1.4 Application 4 - Analog input with dead zone
In this example, the output stay in 0Hz through the first 2.5V of analogic signal. The rotation of the motor only
happens if the Dead Zone parameter is disable (P230 = 0), as presented on Figure 15.5 on page 15-5. On Table
15.4 on page 15-5 are shown the parameters that are used to the correct setting.
Requirements:
Motor 1 HP, 220 V, 2.9 A, 1725 rpm, 60 Hz
Min. Frequency = 0 Hz
Max. Frequency = 45 Hz
Parametrization:
Table 15.4: Parameters for application 4
Analog Input AI1 AI2 Potenciometer Value
Min. Frequency P133 0.0 Hz
Max. Frequency P134 60.0 Hz
Max. Output Voltage P142 100.0 %
Interm. Output Voltage P143 50.0 %
Field Weak. Freq. P145 60.0 Hz
Intermediate Freq. P146 30.0 Hz
Selection source P220 0
Reference source P221 = 1 P221 = 2 P221 = 3 According application*
Rotation sel. P223 0
Signal function P231 P236 P241 0
Gain P232 P237 P242 1.000
Input signal P233 P238 - According application**
Offset P234 P239 P244 -25.0 %
Dead Zone** P230 1
(*) Consult Chapter 7 COMMAND AND REFERENCES on page 7-1.
(**) For AIx consult Chapter 9.1 ANALOG INPUTS on page 9-1 , for potenciometer this parameter is not available.
Example:
P134 (60 Hz)
45 Hz
P133 (0 Hz)
-15 Hz
0 .................. 5 V ............ 10 V
0 ..................10 mA ......... 20 mA
4 ................ 12 mA ......... 20 mA
10 V ............ 5 V ............... 0
20 mA ....... 10 mA ............ 0
20 mA ....... 12 mA ........... 4 mA
AIx Signal
Output
Frequency
Forward
Reverse
For AI1 set to 0-10 V (P233=0):
Analog input 10 V:
P018(%) =
(
10 V
10 V
x (100.0 %) + (-25.0 %)
)
x 1.000 = 75.0 %
Output Freq. = P018 x P134 = 75.0 % x 60.0 Hz = 45.0 Hz
Analog input 2.5 V:
P018(%) =
(
2.5 V
10 V
x (100.0 %) + (-25.0 %)
)
x 1.000 = 0.0 %
Output Freq. = P018 x P134 = 0.0 % x 60.0 Hz = 0.0 Hz
Analog input 0 V:
P018(%) =
(
0 V
10 V
x (100.0 %) + (-25.0 %)
)
x 1.000 = -25.0 %
Output Freq. = P018 x P134 = -25.0 % x 60.0 Hz = -15.0 Hz
Figure 15.5: Result for application 4
Micro Mini Drives | 15-5