Analog Input Configuration; Auto-Tuning Procedure - Hitachi SJ100 Series Quick Reference Manual

Analog Input Configuration

The following tables show the parameter settings required for vari-
ous analog input signal types.
[AT]
OFF
ON
(not assigned to any input
terminal)
Analog Output Function Listing
The following table shows all three functions available for assign-
ment to the analog output terminal:
• Terminal [FM], option set by C_23
Option Function
Code
00 Output
frequency
01 Output
current
02 Digital output
frequency

Auto-tuning Procedure

The SJ100 auto-tuning feature calibrates the inverter to the parame-
ters of a specific motor such as winding resistance and reactance.
For optimum sensorless vector control, it is important to auto-tune
during the initial installation, and after replacing either the motor or
the inverter.
Auto-tuning requires that you configure the inverter for SLV control
(set A_44 = 02). Then you can perform the auto-tuning procedure,
which is detailed in the SJ100 Inverter Instruction Manual.
Name
Actual motor speed,
represented by PWM
signal
Motor current (% of
maximum rated output
current), represented by
PWM signal
Output frequency
External Frequency Command Input
Summation of [O] — [L] and [OI] — [L]
Description
23
[O] — [L]
[OI] — [L]
Corresponding
Signal Range
0 to max. freq. in Hz
0 to 200%
0 to max. freq. in Hz