YASKAWA CIMR-VU BA0001 Technical Manual page 206

5.7 H: Terminal Functions
Default Settings
Using the factory default settings for the analog input's function, gain, and bias, the 0 to 10 Vdc signal at the analog input will
yield a 0 to 100% frequency reference span.
Setting Examples
• Gain H3-03 = 200%, A1 as frequency reference input:
An input 10 Vdc will be equivalent to a 200% frequency reference and 5 Vdc will be equivalent to a 100% frequency
reference. Since the drive output is limited by the maximum frequency parameter (E1-04), the frequency reference will be
equal to E1-04 above 5 Vdc.
Figure 5.70 Frequency Reference Setting by Analog Input with Increased Gain
• Bias H3-04 = -25%, A1 as frequency reference input
An input of 0 Vdc will be equivalent to a -25% frequency reference.
When parameter H3-01 = 0 the minimum frequency reference is 0% between 0 and 2.5 Vdc input. An analog input of 2.5
to 10 Vdc will now be the same as 0 to 100% of the frequency reference span.
When parameter H3-01 = 1, the motor will rotate in reverse between 0 and 2.5 Vdc input.
• Gain = 0%, Bias = 100%, A1 as frequency reference input
This setting leads to an inverse-acting frequency reference. The minimum analog input level (0 Vdc) will produce a 100%
frequency reference and the maximum analog input level (10 Vdc) will produce a 0% frequency reference.
206
Gain = 100 %
Figure 5.69 Analog Input A1 Default Characteristics
Gain = 200 %
Frequency
reference
Bias = 0 %
Gain = 100 %
Frequency
reference
Bias = -25%
Figure 5.71 Frequency Reference Setting by Analog Input with Negative Bias
Frequency
reference
Bias = 0 %
0 V 10 V
100 %
E1-04
0 V
5 V 10 V
H3-01 = 0
0
2.0 V 10 V
H3-01 = 1
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual