3 - 7 
MELSEC-Q
3   SPECIFICATIONS AND FUNCTIONS 
 
Position control
•1-axis linear control
•2-, 3-, or 4-axis linear 
 interpolation control
•1-axis fixed-feed control
•2-, 3-, or 4-axis fixed-feed 
 control
•2-axis circular interpolation 
 control
 
Main functions
Sub functions
OPR control
Control registered in QD75
[Positioning start No.]
[9002]
[9001]
 Machine OPR
 Fast OPR
(Functions characteristic to 
 machine OPR)
OP shift function
<Functions that compensate 
  control>
<Functions that limit control>
Speed limit function
Torque limit function
Software stroke limit function
Hardware stroke limit function
<Functions that change 
  control details>
Speed change function
Override function
Acceleration/deceleration 
time change function
Torque change function
<Absolute position restoration 
  function>
<Other functions>
Step function
Skip function
Continuous operation 
interrupt function 
M code output function
Teaching function
Target position change 
function
Command in-position 
function
Acceleration/deceleration 
processing function
Pre-reading start function
Stop command processing 
for deceleration stop function 
Backlash compensation 
function
Near pass function
Output timing selection of
near pass control
Major positioning control
Control using "Positioning data"
<Control system>
<Operation pattern>
High-level positioning control
[Block start data
Block start 
(Normal start)
Condition start
Wait start
Simultaneous start
Repeated start 
(FOR loop)
Repeated start 
(FOR condition)
Multiple axes 
simultaneous start 
control
Manual control
ol with signals input from external source
Common 
functions
[Positioning start signal]
JOG start signal ON
JOG operation, Inching 
operation
Other control
Speed-position switching control
Position-speed switching control
[Positioning start No.]
[9004]
Speed control
•1-axis linear control
•2-axis linear interpolation 
 control
•3-axis linear interpolation 
 control
•4-axis linear interpolation 
 control
•Current value changing, 
 NOP instruction
•JUMP instruction, 
 LOOP to LEND
Independent 
positioning control 
(Positioning complete)
Continuous 
positioning control
Continuous path 
control
Control using "positioning data" 
+ "Block start data"
Major positioning control
Pulse input from manual pulse 
generator
Manual pulse generator 
operation
Parameter initialization function Execution data backup function External I/O logic switching function
External I/O signal monitor function
OPR retry function
Electronic gear function
Deceleration start flag 
function