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MELSEC-A
6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL
6.5.3 Start program
This program is used to start the control with start commands.
The control can be started with the following two methods.
(1) Starting by inputting positioning start signal [Y10, Y11, Y12]
(2) Starting by inputting external start signal
PLC CPU
Buffer memory
1150
Input/output signal
1
1)
ON
2)
Y10
Drive unit
Control with
positioning data
No. 1
3)
When starting positioning with the scan
after the completion of positioning,
insert X1 as an interlock so that
positioning is started after Y10 is turned
OFF and X1 is turned OFF.
*
1) Set the "positioning start No." in "
Cd.11 Positioning start No." according to the control to
be started.
(In the above example, set positioning data No. "1".)
2) Input the positioning start signal [Y10, Y11, Y12] or the external start signal.
3) The positioning data No. "1" will start.
Fig. 6.2 Procedures for starting control
Starting conditions
When starting, the following conditions must be satisfied. The program must be
configured by adding the required conditions into the sequence program so that
the operation does not start until the conditions are satisfied.
Device
Signal name
Signal state
Axis 1 Axis 2 Axis 3
PLC READY signal
ON PLC CPU preparation completed
Y1D
AD75 READY signal
OFF AD75 preparation completed
X0
Axis stop signal
OFF Axis stop signal is OFF
Y13
Y14
Y1C
Start complete signal
OFF Start complete signal is OFF
X1
X2
X3
BUSY signal
OFF BUSY signal is OFF
X4
X5
X6
Error detection signal
OFF There is no error
XA
XB
XC
Interface
signal
M code ON signal
OFF M code ON signal is OFF
XD
XE
XF
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
–
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