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MELSEC-Q
9 MAJOR POSITIONING CONTROL
Setting method for the current value changing function
The following shows an example of a sequence program and data setting to
change the current value to a new value with the positioning start signal. (The
"
Md.20
Current feed value is changed to "5000.0
µ
m" in the example shown.)
(1) Set the following data.
(Set with the sequence program shown in (3), while referring to the start time
chart shown in (2).)
Buffer memory address
Setting item
Setting
value
Setting details
Axis 1 Axis 2 Axis 3 Axis 4
Cd.3
Positioning start No. 9003 Set the start No. "9003" for the new current value. 1500 1600 1700 1800
Cd.9
Current value changing 50000
Set the new "
Md.20
Current feed value".
1506
1507
1606
1607
1706
1707
1806
1807
Refer to Section 5.7 "List of control data" for details on the setting details.
(2) The following shows a start time chart.
Positioning start signal
PLC READY signal
QD75 READY signal
Start complete signal
BUSY signal
Positioning complete signal
9003
V
t
Error detection signal
50000
Start of data No. 9003
Data No. during positioning execution
Address during positioning execution
Md.20 Current feed value
Cd.3 Positioning start No.
Cd.9 Current value changing
50000
[Y10]
[Y0]
[X0]
[X10]
[XC]
[X14]
[X8]
Fig. 9.21 Changing to a new current value using the start No. (No. 9003) for a current value changing