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9 - 18 
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. 
 
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..................................315.00000° 
• Software stroke limit upper limit value ...................................90.00000° 
2) To set the movement range B, set as follows. 
• Software stroke limit lower limit value....................................90.00000° 
• Software stroke limit upper limit value .................................315.00000° 
 
(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.