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MELSEC-Q
 
11   MANUAL CONTROL 
 
11.4.4 Creating a program to enable/disable the manual pulse generator operation  
A PLC program must be created to execute a manual pulse generator operation. 
Consider the "required control data setting", "start conditions" and "start time chart" 
when creating the program.  
The following shows an example when a manual pulse generator operation is started 
for axis 1. 
 
 Required control data setting 
 
The control data shown below must be set to execute a manual pulse generator 
operation. The setting is carried out with the PLC program.  
 
Buffer memory address 
Setting item 
Setting 
value 
Setting details 
Axis 
Axis 
Axis 
Axis 
 Cd.20 
 
Manual pulse 
generator 1 pulse 
input magnification 
Set the manual pulse generator 1 pulse input 
magnification. 
1522 
1523 
1622 
1623 
1722 
1723 
1822 
1823 
 Cd.21 
 
Manual pulse 
generator enable 
flag 
1 (0) 
Set "1: Enable manual pulse generator 
operation". (Set "0: Disable manual pulse 
generator operation" when finished with the 
manual pulse generator operation.) 
1524 1624 1724 1824 
 
                   Refer to Section 5.7 "List of control data" for details on the setting details. 
 
 Start conditions  
 
The following conditions must be fulfilled when starting. The required conditions 
must also be assembled in the PLC program, and the PLC program must be 
configured so the operation will not start if the conditions are not fulfilled.  
 
Device 
Signal name 
Signal state 
Axis 
Axis 
Axis 
Axis 
PLC READY signal 
ON  PLC CPU preparation completed 
Y0 
QD75 READY signal 
ON  QD75MH preparation completed 
X0 
All axis servo ON 
ON  All axis servo ON 
Y1 
Synchronization flag   ON 
QD75MH buffer memory 
The access is possible. 
X1 
Axis stop signal 
OFF  Axis stop signal is OFF 
Y4  Y5  Y6  Y7 
Start complete signal 
OFF  Start complete signal is OFF 
X10  X11  X12  X13 
BUSY signal 
OFF  QD75MH is not operating 
XC  XD  XE  XF 
Error detection signal 
OFF  There is no error 
X8  X9  XA  XB 
Interface 
signal 
M code ON signal 
OFF  M code ON signal is OFF 
X4  X5  X6  X7 
Forced stop input signal  ON  There is no forced stop input 
– 
Stop signal 
OFF  Stop signal is OFF 
– 
Upper limit (FLS) 
ON  Within limit range 
– 
External 
signal 
Lower limit (RLS) 
ON  Within limit range 
– 
 
  If the PLC CPU is set to the asynchronous mode in the synchronization setting, this must be 
inserted in the program for interlocking.  If it is set to the synchronous mode, it must not be 
inserted in the program for interlocking because it is turned ON when the PLC CPU executes 
calculation.