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12 - 74 
MELSEC-Q
 
12   CONTROL SUB FUNCTIONS 
 
[2]   Precautions during control 
(1)  Before teaching, a "machine OPR" must be carried out to establish the OP. 
(When a current value changing, etc., is carried out, "
Md.20
 Current feed 
value" may not show absolute addresses having the OP as a reference.) 
(2)  Teaching cannot be carried out for positions to which movement cannot be 
executed by manual control (positions to which the workpiece cannot 
physically move). (During center point designation circular interpolation 
control, etc., teaching of "
Da.7
 Arc address" cannot be carried out if the 
center point of the arc is not within the moveable range of the workpiece.) 
(3)  Writing to the flash ROM can be executed up to 100,000 times.  
If writing to the flash ROM exceeds 100,000 times, the writing may become 
impossible (assured value is up to 100,000 times). 
If an error (error code: 805) occurs when writing to the flash ROM has been 
completed, check whether or not the program is created so as to write 
continuously to the flash ROM. 
 
[3]   Data used in teaching 
The following control data is used in teaching. 
 
Buffer memory address 
Setting item 
Setting 
value 
Setting details 
Axis 
Axis 
Axis 
Axis 
 Cd.1  
Flash ROM write 
request 
Write the set details to the flash ROM (backup 
the changed data). 
1900 
 Cd.38   
Teaching data 
selection 
 
Sets to which "current feed value" is written. 
0: Written to "
Da.6
Positioning address/  
movement amount". 
1: Written to "
Da.7
Arc address". 
1548 1648 1748 1848 
 Cd.39   
Teaching 
positioning data 
No. 
 
Designates the data to be taught. 
(Teaching is carried out when the setting value 
is 1 to 600.) 
When teaching has been completed, the 
QD75MH is zero cleared in the initial stage. 
1549 1649 1749 1849 
 
                   Refer to Section 5.7 "List of control data" for details on the setting details.