3 multi-speed gain adjustment, Multi-speed gain adjustment – Hitachi SJ300 Series User Manual
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Chapter 2 – Explanation of Functions
2.3 Multi-speed Gain adjustment
xxx Set gain of the maximum frequency (G8 in following figure) is maintained when a higher target frequency is How to Adjust Increasing line can also (f8, G8) G8 is maintained if output frequency exceeds f8 0 Output frequency (Hz) f1 f2 f3 f4 f5 f6 f7 Figure 3 – Multispeed Gain Effect f8 100% Gain (%) Base line (initial setting) (f1, G1) G1 is maintained if only f1 is set (ex) Start point is 0Hz, 100% (1) The purpose of this function is to get high gain at brake OFF and at stopping, and to have low gain at higher speed. Therefore increase the gain at a speed that is lower than the creep speed as a around 1.0-2.0 in the range of lower than the creep speed, as a rough target. 13
Unique ASR (automatic speed regulator) gains (P-gain and I-gain) can be assigned for each output
frequency. The gain of 100% is calculated based on a value of motor inertia (J: H024, H034), speed
response coefficient (H005) and parameters of H070, H071, and H072, adjustable from 0% up to 100%.
Set the frequencies so f1
set.
be set
rough initial target.
(2) When using a geared motor decrease H005, H050, H051, H070, H071, and/or H072. Set H005 of