YASKAWA L1000A - Page 218

5.7 H: Terminal Functions
218 YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
■ H3-03, H3-04: Terminal A1 Gain and Bias Settings
Parameter H3-03 sets the level of the selected input value that is equal to 10 Vdc input at terminal A1 (gain).
Parameter H3-04 sets the level of the selected input value that is equal to 0 V input at terminal A1 (bias).
Both can be used to adjust the characteristics of the analog input signal to terminal A1.
Setting Examples
• Gain H3-03 = 200%, bias H3-04 = 0, terminal A1 as speed reference input (H3-02 = 0):
A 10 Vdc input is equivalent to a 200% speed reference and 5 Vdc is equivalent to a 100% speed reference. Since the
drive output is limited by the maximum frequency parameter (E1-04), the speed reference will be equal to E1-04 above
5 Vdc.
Figure 5. 30
Figure 5.30 Speed Reference Setting by Analog Input with Increased Gain
• Gain H3-03 = 100%, bias H3-04 = -25%, terminal A1 as speed reference input:
An input of 0 Vdc will be equivalent to a -25% speed reference.
When parameter H3-01 = 0, the speed reference is 0% between 0 and 2 Vdc input.
When parameter H3-01 = 1, the motor will rotate in reverse between -10 and 2 Vdc input.
Figure 5. 31
Figure 5.31 Speed Reference Setting by Analog Input with Negative Bias
■ H3-09: Terminal A2 Signal Level Selection
Selects the input signal level for analog input A2.
Setting 0: 0 to 10 Vdc
The input level is 0 to 10 Vdc. Refer to Setting 0: 0 to 10 Vdc on page 217 for details.
No. Parameter Name Setting Range Default
H3-03 Terminal A1 Gain Setting -999.9 to 999.9% 100.0%
H3-04 Terminal A1 Bias Setting -999.9 to 999.9% 0.0%
No. Parameter Name Setting Range Default
H3-09 Terminal A2 Signal Level Selection 0 or 1 0
100%
-100%
5 V
10 V
-5 V-10 V
E1-04
E1-04
H3-01 = 0 H3-01 = 1
0 V
10 V5 V
0 V
Gain = 200%
Gain = 200%
100%
Speed
reference
Bias = 0%
E1-04
Gain = -200%
common_TMonly
2.0 V
10 V
-6.0 V-10 V
E1-04
0
-100%
-150%
2.0 V 10 V
100%
Speed
reference
-25%
-25%
H3-01 = 0
H3-01 = 1
H3-01 = 0
H3-01 = 1
100%
Analog Input
V
oltage
Analog Input
Voltage
common_TMonly
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