5 - 134 
MELSEC-Q
 
5   DATA USED FOR POSITIONING CONTROL 
 
Storage item  Storage details 
 
 
 
 
 
Md.100
 OPR re-travel value 
•
 This area stores the travel distance during the OPR travel to the zero point that 
was executed last time. 
For setting units 
Example) mm 
                 (Buffer memory 
 0.1) µm 
 
 
 
 
 
 
 
Md.101
 Real current value 
•
 This area stores the present value (feed present value – deviation counter droop 
pulses). 
Update timing: 3.5ms 
Example) mm 
                 (Buffer memory 
 0.1) µm 
 
 
 
 
 
 
 
Md.102
 Deviation counter value 
•
 This area stores the difference between the feed present and the actual present 
value. 
(Buffer memory details) PLS 
 
 
 
 
 
 
Md.103
 Motor rotation speed 
•
 This area stores the present rotation speed of the servomotor. 
(Buffer memory 
 0.1) rpm 
 
 
 
 
 
 
Md.104
 Motor current value 
•
 This area stores the present motor current value of the motor. 
(Buffer memory 
 0.1) % 
 
 
 
 
 
 
 
 
Auto tuning 
Load inertia ratio (Buffer memory details   0.1) 
Position loop gain 1 [rad/s] 
Speed loop gain 1 [rad/s] 
Position loop gain 2 [rad/s] 
Speed loop gain 2 [rad/s] 
Md.105
 Servo parameter 
•
 This area stores the parameter 
currently used by the servo 
amplifier. 
Speed integral compensation [ms] 
 
 
 
 
 
 
 
 
 
 
Md.106
 Servo amplifier S/W No. 
•
 This area stores the S/W No. of the servo amplifier used.