Hitachi SJ300 Series Multi-SpeedSelect, Multi, Multi, speed, speed, Multi-speed, Input Function, Input Function, Override Feature

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SJ300 Inverter

Multi-Speed Select

The inverter can store up to 16 different fixed target frequencies (speeds) in parameters A020 to A035. Binary inputs select the speed through four of the intelligent terminals configured as binary-encoded inputs CF1 to CF4 per the table. These can be any of the eight inputs, and in any order. You can use fewer inputs if you need eight or fewer speeds.

Multi-		Input Function				Multi-		Input Function
speed	CF4		CF3	CF2	CF1	speed	CF4		CF3	CF2	CF1
Speed 0	0		0	0	0	Speed 8	1		0	0	0
Speed 1	0		0	0	1	Speed 9	1		0	0	1
Speed 2	0		0	1	0	Speed 10	1		0	1	0
Speed 3	0		0	1	1	Speed 11	1		0	1	1
Speed 4	0		1	0	0	Speed 12	1		1	0	0
Speed 5	0		1	0	1	Speed 13	1		1	0	1
Speed 6	0		1	1	0	Speed 14	1		1	1	0
Speed 7	0		1	1	1	Speed 15	1		1	1	1

NOTE: When choosing a subset of speeds to use, always start at the top of the table, and with

the least-significant bit: CF1, CF2, etc.

The example with eight speeds in the figure below shows how input switches configured for CF1 – CF3 functions can change the motor speed in real time.

Speed

3rd

7th

5th

2nd

1st

6th

4th

0th

Switches t

CF1

Operations Monitoring and

CF2

CF3

Fwd Run

Multi-speed Override Feature - The multi-speed function can selectively override the external analog speed reference input. When the Frequency Source Setting parameter A001=01, the control terminal inputs determine the output frequency. At the same time, the inverter can use multi-speed select for output frequency if one or more intelligent inputs are configured as a CF type (CF1 to CF4). When all CF input(s) are OFF, the control terminal input determines the output frequency normally. When one or more CF input(s) are ON, then the corresponding multi-speed setting (see the table above) overrides and becomes the output frequency.