9MAJOR POSITIONING CONTROL

9.1.5 Control unit "degree" handling

MELSEC-Q

When the control unit is set to "degree", the following items differ from when other control units are set.

[1] Current feed value and machine feed value addresses

The address of “ Md.20

Current feed value” becomes a ring address from 0 to

359.99999°.

But the address of “ Md.21

Machine feed value” doesn’t become a ring address.

359.99999° 359.99999°

0° 0° 0°

[2] Software stroke limit valid/invalid setting

With the control unit set to "degree", the software stroke limit upper and lower limit values are 0 to 359.99999.

(a) Setting to validate software stroke limit

To validate the software stroke limit, set the software stroke limit lower limit value and the upper limit value in a clockwise direction.

0

Clockwise direction

315.00000

Section A

90.00000

Section B

1) To set the movement range A, set as follows.

• Software stroke limit lower limit value

315.00000º

• Software stroke limit upper limit value

90.00000º

2) To set the movement range B, set as follows.

• Software stroke limit lower limit value

90.00000º

• Software stroke limit upper limit value

315.00000º

(b) Setting to invalidate software stroke limit

To invalidate the software stroke limit, set the software stroke limit lower limit value equal to the software stroke limit upper limit value.

The control can be carried out irrespective of the setting of the software stroke limit.

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Mitsubishi Electronics QD75P, QD75D Control unit degree handling, Current feed value and machine feed value addresses