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MELSEC-Q
10 HIGH-LEVEL POSITIONING CONTROL
10.6.2 Example of a start program for high-level positioning control
The following shows an example of a start program for high-level positioning control in
which the 1st point " block start data" of axis 1 is started. (The block No. is regarded as
"7000".)
Control data that require setting
The following control data must be set to execute high-level positioning control.
The setting is carried out using a sequence program.
Buffer memory address
Setting item
Setting
value
Setting details
Axis
1
Axis
2
Axis
3
Axis
4
Cd.3
Positioning start
No.
7000
Set "7000" to indicate control using " block start
data".
1500 1600 1700 1800
Cd.4
Positioning starting
point No.
1
Set the point No. of the " block start data" to be
started.
1501 1601 1701 1801
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 control. The required
conditions must also be integrated into the sequence program, and configured so
the control does not start unless the conditions are fulfilled.
Device
Signal name Signal state
Axis
1
Axis
2
Axis
3
Axis
4
PLC READY signal ON PLC CPU preparation completed Y0
QD75 READY signal ON QD75 preparation completed X0
Synchronization flag ON
QD75 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 BUSY signal is OFF 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
Drive unit READY signal ON Drive unit preparation completed –
Stop signal OFF Stop signal is OFF –
Upper limit (FLS) ON Within limit range –
External
signal
Lower limit (RLS) ON Within limit range –