Hitachi SJ Series User Manual page 181

Chapter 12
12.4.10 Multi-step switching of frequency
commands.
Ｑ
• Want to use signal input to make multi-step
switching of the output frequency of the inverter.
Ａ
• A frequency command is controlled with a signal
pattern by setting multiple command frequencies in
advance.
• In the multi-step speed command, one can either
give a binary combination of 0 (OFF) and 1 (ON) or
give a priority on certain terminals (bit operation).
• In the binary operation, a frequency at max. 16th
speed with four terminals can be set. In the bit
operation, a frequency at max. 8th speed with seven
terminals can be set.
Parameters
Item
Main speed
command monitor
Multi-step speed
selection
0th speed of the
multi-step speed
1st-15th speeds of
the multi-step
speed
Multi-step input
determination time
Parameters
Data change
depending on the
[FA-01]
frequency command
selection.
[Ab-03]
0.00/Min. frequency
[Ab110]
-max. frequency (Hz)
0.00/Min. frequency
[Ab-11]~[Ab-25]
-max. frequency (Hz)
[CA-55] 0~2000(ms)
！
• If the operator keypad [AA101]=07 is chosen in the
frequency command selection, rewriting of the main
speed command [FA-01] automatically rewrites
[Ab110], frequency setting of the 0th speed.
• The frequency setting for the 1st to 15th speeds
should be made in the 1st-15th speeds of the
multi-step speed function ([Ab-11]-[Ab-25]).
• With the multi-step speed function, one can set the
acceleration/deceleration time individually for the
frequency switching in the multi-step speed
command. For details, see "12.8.3 Setting
acceleration/deceleration time in multi-step speed"
• The multi-step speed function is effective only for
the main speed command. Not applied to the
auxiliary speed command
• If [SET] terminal is made ON and the secondary
setting function is used, [Ab210] instead of [Ab110]
becomes effective.
Data
The frequency command value is shown.
00 Binary operation, max. 16 speed modes
01 Bit operation, max. 8 speed modes
0th speed of the multi-step speed
1st-15th speeds of the multi-step speed
This is the time to fix the frequency in
switching the multi-step speed.
12-4-12
Inverter Functions
Description