6 Related Parameters
YASKAWA ELECTRIC TOBP C730600 38C 1000-Series Option AI-A3 Installation Manual 23
■ Setting 1: Combined Inputs
This setting combines the three input signals of the option into one frequency reference
signal as illustrated in Figure 13.
Set parameter b1-01 to 3 and set parameters F2-02 and F2-03 to set the gain and bias settings
for the combined input signal. Pay special attention to the internal gains and interaction
among inputs as indicated in Figure 13 when setting this function.
Figure 13
Figure 13 Combining Inputs for the Frequency Reference
Adjusting Input Levels with F2-02 and F2-03
The gain set to parameter F2-02 along with the combined input signal determines the
percentage of maximum output frequency used as the frequency reference when the bias set
to F2-03 is 0.
Note: For a single channel, a voltage input of 10 V or a current input of 20 mA is referred as 100%
The bias set to parameter F2-03 determines the percentage of the maximum output
frequency used as the frequency reference when the combined input signal is 0%.
Note: For a single channel, a voltage input of 0 V or a current input of 4 mA is referred as 0%
Example 1: If the gain in F2-02 is set to 50% and the bias in F2-03 is set to 0%, a combined
input signal of 100% yields a frequency reference 50% of the maximum frequency
reference. A combined input of 200% yields a frequency reference equal to the maximum
output frequency.
Example 2: If the gain in F2-02 is set to 200% and the bias in F2-03 is set to 0%, a combined
input signal of 50% yields a frequency reference equal to the maximum output frequency.
Increasing the input signal will not create a higher reference since maximum frequency
reference has already been reached.
Example 3: If the bias in F2-02 is set to 30% and the gain in F2-03 is set to 100%, a 0%
combined signal yields a frequency reference 30% of the maximum output frequency.
Inputting a combined reference of 70% will yield a reference of equal to the maximum
output frequency. Increasing the input signal will not create a higher reference since
maximum frequency reference has already been reached.
+
+
+
+
+
V2
10 V to 10 V
or 4 to 20 mA
V1
10 V to 10 V
or 4 to 20 mA
V3
10 V to 10 V
or 4 to 20 mA
×
1/10
1/10
F2-02
F2-03
Frequency reference
from the option
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