Hitachi SJ300 Series manual 194

4–56

Using Intelligent Output Terminals

The table below shows the settings and their meanings. Use the one that matches your load.

Function Code	Data	Function/Description
	00	Reduced torque
B013 / B213 /B313	01	Constant torque
	02	Free-setting

Reduced Torque Characteristic – The example below shows the effect of the reduced torque characteristic curve (for example motor and current rating). At 20Hz, the output current is reduced by a factor of 0.8 for given trip times.

Operations and Monitoring

Trip current				Trip
reduction
factor				time (s)
x 1.0				60
x 0.8
x 0.6				0.5
0			Hz	0				A
5	20	60		42.7		55.2	73.6
				92.8%		120%	160%
					Reduced trip current at 20 Hz

Constant Torque Characteristic – Selecting the constant torque characteristic for the example motor gives the curves below. At 2.5 Hz, the output current is reduced by a factor of 0.9 for given trip times.

Trip current				Trip
reduction				time (s)
factor
x 1.0				60
x 0.9
x 0.8				0.5
0
			Hz	0				A
2.5	5	60		47.8		62.1	82.8
				104%		135%	180%
					Reduced trip current at 2.5 Hz

Free Thermal Characteristic - It is possible to set the electronic thermal characteristic using a free-form curve defined by three data points, according to the table below.

Function	Name	Description	Range
Code
B015 /	Free-setting electronic	Data point coordinates for Hz axis	0 to 400Hz
B017 /	thermal frequency 1, 2, 3	(horizontal) in the free-form curve
B019
B016 /	Free setting electronic	Data point coordinates for Ampere	0.0 = (disable)
B018 /	thermal current 1, 2, 3	axis (vertical) in the free-form curve	0.1 to 1000.
B020