Hitachi WJ C1 Series

Chapter 9 Inverter Functions
9-15-5
Example of the analog start/end function setting
■ Example 1. Start value selection = 00
■ Example 2. Start value selection = 01
Fine-tuning by analog input adjustment gain
 The figure below shows an example of the "[Ai1] Input gain adjustment [C081]" and "[Ai2] Input
gain adjustment [C082]" settings. The analog input scale conversion (for example, changing the
analog input range of the frequency command from the input of 0 to 10 VDC to that of 0 to 5
VDC) should normally be set using the analog start/end function.
 This function should be used for fine-tuning when the analog start/end function results in a
discrepancy.
Analog input
(VDC/mA)
Maximum
frequency
[A012]
[A102]
[A162]
[A011]
[A101]
[A161]
0
[A013]
[A103]
[A163]
100%
0 VDC
4 mA
POT min.
10 VDC
20 mA
POT Max.
Frequency
command
[A014]
[A104]
[A164]
The frequency command
from 0% to the start ratio
uses the start value
Analog input
(VDC/mA)
Maximum
frequency
[A012]
[A102]
[A162]
[A011]
[A101]
[A161]
0
[A013]
[A103]
[A163]
100%
0 VDC
4 mA
POT min.
10 VDC
20 mA
POT Max.
Frequency
command
[A014]
[A104]
[A164]
The frequency command from
0% to the start ratio is 0 Hz
Analog input [Ai1]/[Ai2]
Maximum
frequency
0 VDC/4 mA
10 VDC/20 mA
Frequency command
200%
100%
50%
When [C081]/[C082] = 200%
When [C081]/[C082] = 50%
A
A