Parameter Details
12
12.7 H: TERMINALS
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 733
Example Analog Input Settings
• The function set for terminal AI1 is set with Freq Ref/BIAS [H3-02 = 4], the gain is 200% [H3-03 = 200.0],
and the bias is 0% [H3-04 = 0.0].
When you input a 10 V signal, the frequency reference will be 200%.
When you input a 5 V signal, the frequency reference will be 100%. Parameter E1-04 [Max Output Frequency]
restricts drive output. When you input a 5 V or more signal, the frequency reference will be 100%.
Figure 12.98 Freq Reference When the Analog Input Gain Setting Is Adjusted
• The function set for terminal AI1 is set with Freq Ref/BIAS [H3-02 = 4], the gain is 100% [H3-03 = 100.0],
and the bias is -25% [H3-04 = -25.0].
When you input a 0 V signal, the frequency reference will be -25%.
When H3-01 = 2 [AI1 Signal Level Select = 4 to 20 mA (Q2A Only)], when you input a 0 V to 2 V signal, the
frequency reference will be 0%. When you input a 2 V to 10 V signal, the frequency reference will be 0% to
100%.
When H3-01 = 1 [-10 to +10V (Bipolar Reference) (Q2V: 0 to 10 V without zero limit)], it enables signals of
positive and negative polarities. When you input a 0 V to 2 V signal, and the motor rotates in reverse.
Figure 12.99 Frequency Reference When Negative Number Bias Is Configured
■ Modbus Multi-Function AI1 to 3 Function Selection
Let the MFAI function be assigned to Modbus register 15C1 to 15C3 (Hex.) [Mbus Reg 15C1h through 15C3h
Input Function]. Use H3-40 to H3-42 [15C1h Input Function to 15C3h Input Function] to set the function and use
H3-43 [Mbus In FilterTime Const] to set the input filter.
Table 12.49 Modbus Multi-Function AI Command Register
Register No.
(Hex.)
Name Range
*1
Parameter
15C1 15C1h Input Function -32767 to 32767 H3-40
15C2 15C2h Input Function -32767 to 32767 H3-41
15C3 15C3h Input Function -32767 to 32767 H3-42
*1 Set as 100% = 4096.
Figure 12.100 Functional Block Diagram for Modbus Multi-Function AI Command 1
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