Hitachi SJ300 Series Analog Input Settings

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SJ300 Inverter

Analog Input Settings

The inverter has the capability to accept external analog inputs that can command the output frequency to the motor. Signals including voltage input (0 to +10V) at terminal [O], bipolar input (-10 to +10V) at terminal [O2], and current input (4 to 20mA) at terminal [OI] are avail- able. Terminal [L] serves as signal ground for the three analog inputs. The analog input settings adjust the curve characteristics between the analog input and the frequency output.

Adjusting [O–L] characteristics – In the graph to the right, A013 and A014 select the active portion of the input voltage range. Parameters A011 and A012 select the start and end frequency of the converted output frequency range, respec- tively. Together, these four parameters define the major line segment as shown. When the line does not begin at the origin (A011 and A013 > 0), then A015 defines whether the inverter outputs 0Hz or the A011-specified frequency when the analog input value is less than the A013 setting. When the input voltage is greater than the A014 ending value, the inverter outputs the ending frequency specified by A012.

Adjusting [OI–L] characteristics – In the graph to the right, A103 and A104 select the active portion of the input current range. Parameters A101 and A102 select the start and end frequency of the converted output frequency range, respec- tively. Together, these four parameters define the major line segment as shown. When the line does not begin at the origin (A101 and A103 > 0), then A105 defines whether the inverter outputs 0Hz or the A101-specified frequency when the analog input value is less than the A103 setting. When the input voltage is greater than the A104 ending value, the inverter outputs the ending frequency specified by A102.

f

max. frequency

A012

A015=0

A011
			A015=1			% input
	0%				100%
		A013		A014
	0V				10V

f

max. frequency

A102

A105=0

A101 A105=1

% input

0%	A103	A104	100%
4mA			20mA

Parameters Drive Configuring

Adjusting [O2–L] characteristics – In the graph to the right, A113 and A114 select the active portion of the input voltage range. Parameters A111 and

A112 select the start and end frequency of the converted output frequency range, respectively. Together, these four parameters define the major line segment as shown. When the input voltage is less than the A113 input starting value, the inverter outputs the starting frequency specified by A111. When the input voltage is greater than the A114 ending value, the inverter outputs the ending frequency specified by A112.

			f			max. fwd frequency
–100%		A112
-10V	A113								% input
				0				+100%
							A114
									+10V
					A111
						f
max. rev frequency