466
10.3.5
Simultaneous start
In a "simultaneous start", the positioning data set in the "[Da.12] Start data No." and positioning data of other axes set
in the "condition data" are simultaneously executed (pulses are output with the same timing).
(The "condition data" is designated with "[Da.14] Parameter".)
Section (2) shows a control example where the " block start data" and "positioning data" are set as shown in section
(1).
(1) Setting examples
(a) Block start data setting example
It is assumed that the "axis 2 positioning data" for simultaneous starting is set in the "condition data" designated
with "[Da.14] Parameter".
(b) Positioning data setting example
(2) Control examples
The following shows the control executed when the "block start data" of the 1st point of axis 1 is set as shown in
section (1) and started.
1.
Check the axis operation status of axis 2 which is regarded as the simultaneously started axis.
• Axis 2 is standing by.
Go to "2".
• Axis 2 is carrying out positioning.
An error occurs and simultaneous start will not be carried out.
2.
Simultaneously start the axis 1 "positioning data No. 1" and axis 2 positioning data set in
"condition data No. 4".
(3) Precautions
Positioning data No. executed by simultaneously started axes is set to condition data ("[Da.18] Parameter 1",
"[Da.19] Parameter 2", but the setting value of start axis (the axis which carries out positioning start) should be
"0". If the setting value is set to other than "0", the positioning data set in "[Da.18] Parameter 1", "[Da.19]
Parameter 2" is given priority to be executed rather than "[Da.12] Start data No.".
(Refer to
Page 176, Section 5.5 for details.)
Axis 1 block start data
[Da.11]
Shape
[Da.12]
Start data No.
[Da.13]
Special start instruction
[Da.14]
Parameter
1st point
0: End
1
3: Simultaneous start
4
Axis 1 positioning data No.
[Da.1] Operation pattern
1
01: Continuous positioning control
2
01: Continuous positioning control
3
00: Positioning complete
Summary of Contents for MELSEC-L LD75D
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