Creating A Program To Enable/Disable The Inching Operation - Mitsubishi Electric MELSEC-Q QD75M User Manual

11 MANUAL CONTROL

11.3.4 Creating a program to enable/disable the inching operation

Setting item
Inching movement
Cd.16
amount
Refer to Section 5.7 "List of control data" for information on setting details.
Interface
signal
External
signal
A PLC program must be created to execute an inching operation. Consider the
"required control data setting", "start conditions", and "start time chart" when creating
the program.
The following shows an example when an inching operation is started for axis 1. (The
example shows the inching operation when a "10.0 µm" is set in "
movement amount".)
Required control data setting
The control data shown below must be set to execute an inching operation. The
setting is carried out with the PLC program.
Setting
value
Set the setting value so that the JOG speed
100 limit value is not increased larger than the
maximum output pulse
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.
Signal name
PLC READY signal
QD75 READY signal
All axis servo ON
Synchronization flag
Axis stop signal
Start complete signal
BUSY signal
Positioning complete
signal
Error detection signal
M code ON signal
Stop signal
Upper limit (FLS)
Lower limit (RLS)
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.
Setting details
Signal state
ON PLC CPU preparation completed
ON QD75 preparation completed
ON All axis servo ON
Accessible to QD75 buffer
ON
memory
OFF Axis stop signal is OFF
OFF Start complete signal is OFF
OFF QD75 is not operating
Positioning complete signal is
OFF
OFF
OFF There is no error
OFF M code ON signal is OFF
OFF Stop signal is OFF
ON Within limit range
ON Within limit range
11 - 22
MELSEC-Q
Inching
Cd.16
Buffer memory address
Axis Axis Axis Axis
1 2 3 4
1517 1617 1717 1817
Device
Axis Axis Axis Axis
1 2 3 4
Y0
X0
Y1
X1
Y4 Y5 Y6 Y7
X10 X11 X12 X13
XC XD XE XF
X14 X15 X16 X17
X8 X9 XA XB
X4 X5 X6 X7
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