Melsec-q, 6 sequence program used for positioning control – MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D User Manual
Page 248
6 - 28
MELSEC-Q
6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL
Starting conditions
To start the control, the following conditions must be satisfied.
The necessary start conditions must be incorporated in the sequence program so
that the control is not started when the conditions are not satisfied.
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
Accessible
X1
Axis stop signal
OFF Axis stop signal is OFF.
Y4
Y5
Y6
Y7
M code ON signal
OFF M code ON signal is OFF.
X4
X5
X6
X7
Error detection signal
OFF No error is present.
X8
X9
XA
XB
BUSY signal
OFF BUSY signal is OFF.
XC
XD
XE
XF
Interface
signal
Start complete signal
OFF Start complete signal is OFF.
X10
X11
X12
X13
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
–
: When the synchronous setting of the PLC CPU is made in the nonsynchronous mode, this must be
provided as an interlock.
When it is made in the synchronous mode, no interlock must be provided in the program because the
flag is turned ON when calculation is run on the PLC CPU.