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MELSEC-Q
9 MAJOR POSITIONING CONTROL
9.1.5 Control unit "degree" handling
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.
0°
0° 0°
359.99999° 359.99999°
[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.
Section A
Section B
315.00000
90.00000
Clockwise direction
0
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.