FR-A7AX

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PARAMETERS

4.2.5

16 bit digital torque command (FR-A700 series only)

Parameter

304

447

448

804

Name

Selection of digital input and analog input compensation enable/disable

Digital torque command bias

Digital torque command gain

Torque command source selection

Setting Range

0 to 4, 10 to 14, 9999

0 to 400%

0 to 400%, 9999

0, 1, 3 to 6

Initial Value Increments

9999

0

150%

0

1

1%

1%

1

Digital torque command can be given under torque control using the FR-A7AX .

A digital command using the FR-A7AX can be given when "4 (12 bit)" or "14 (16 bit)" is set in Pr.304 and "4" is set in Pr.804 Torque command source selection.

Pr.804

parameter setting

0

1

Description

Torque command by terminal 1 analog input

Torque command by parameter setting

Setting value of Pr.805 or Pr.806 (-400% to 400%)

Remarks

Refer to the inverter manual for details.

3

4

5

6

Torque command by CC-Link communication (FR-A7NC)

12 bit digital input (FR-A7AX)

16 bit digital input (FR-A7AX)

Refer to the inverter manual for details.

Torque command by CC-Link communication (FR-A7NC)

Refer to the instruction manual of the

FR-A7NC for details.

When "4" is set in Pr. 304

When "14" is set in Pr. 304

Refer to the instruction manual of the

FR-A7NC for details.

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PARAMETERS

The input signal uses the last 15 (11) bits as torque command and the most significant bit as sign.

When 16 bit is selected

Bit15 Bit0 sign bit

0: positive, 1: negative

0 to 7FFF

H

or 0 to 190

H

(400)

REMARKS

The digital torque command is input only by binary input.

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PARAMETERS

z Input method of torque command

Torque command may be input in either of the following two ways:

(1) Method to define the torque command value for the input command by setting the torque command value when the input signal is 0 and plus side torque command value when the input signal is 7FFF

H

(7FF

H

) as shown in the graph

Set the torque command value when the input signal is "0" in Pr.447 and the torque command value when the input signal is "7FFF

H

(7FF

H

) in Pr.448 .

Torque command value

Pr.448

150%

Initial value

7FFF

H

(7FF

H

)

0

Pr.447

7FFF

H

(7FF

H

)

Digital input signal

Most significant bit = 1

-150%

Most significant bit = 0

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PARAMETERS

(2) Method to directly input the torque command value as numeral value in digital

When "9999" is set in Pr.448, the input signal is considered as a torque command value.

Even if a value higher than 190H (400) is input, the torque command value is clamped at 400%.

Torque command value

400%

7FFF

H

(7FF

H

)

190

H

(400)

Most significant bit = 1

0

190

H

(400)

-400%

Most significant bit = 0

7FFF

H

(7FF

H

)

Digital input signal

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