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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 fe ed value” becomes a ring address from 0 to
359.99999°.
But the address of “ Md.21 Machi ne feed value” doesn’t become a ring address.
0° 0°
359.99999° 359.99999°
[2] Software stroke limit valid/invalid setting
With the control unit set to "degree", the soft ware 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 sof tware 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 th e so ftw a re st ro ke li mit low e r
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.