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MELSEC-Q
6 SEQUENCE PROGRAM USED FOR POSITIONING CONTROL
6.2 List of devices used
In the sequence programs shown in this chapter and subsequent, the application of the
devices used are as follows.
The I/O numbers for QD75 indicate those when QD75 is mounted in the 0-slot of the
main base.
If it is mounted in the slot other than the 0-slot of the main base, change the I/O
number to that for the position where QD75 was installed.
In addition, change the external inputs, external outputs, internal relays, data resisters,
and timers according to the system used.
(1) Inputs/outputs, external inputs/external outputs, and internal relays
of QD75
Device
Device
name
Axis 1 Axis 2 Axis 3 Axis 4
Application Details when ON
X0 QD75 READY signal Preparation completed
X1 Synchronization flag QD75 buffer memory accessible
X4 X5 X6 X7 M code ON signal M code outputting
X8 X9 XA XB Error detection signal Error detected
XC XD XE XF BUSY signal BUSY (operating)
X10 X11 X12 X13 Start complete signal Start completed
Input
X14 X15 X16 X17 Positioning complete signal Positioning completed
Y0 PLC READY signal PLC CPU preparation completed
Y4 Y5 Y6 Y7 Axis stop signal Requesting stop
Y8 YA YC YE Forward run JOG start signal Starting forward run JOG
Y9 YB YD YF Reverse run JOG start signal Starting reverse run JOG
Inputs/
outputs
of
QD75
Out-
put
Y10 Y11 Y12 Y13 Positioning start signal Requesting start
X20 OPR request OFF command Commanding OPR request OFF
X21 External command valid command
Commanding external command valid
setting
X22 External command invalid command
Commanding external command
invalid
X23 Machine OPR command Commanding machine OPR
X24 Fast OPR command Commanding fast OPR
X25 Positioning start command Commanding positioning start
X26
Speed-position switching operation
command
Commanding speed-position switching
operation
X27
Speed-position switching enable
command
Commanding speed-position switching
enable command
X28
Speed-position switching prohibit
command
Commanding speed-position switching
prohibit
X29 Movement amount change command
Commanding movement amount
change
X2A
High-level positioning control start
command
Commanding high-level positioning
control start
External
input
(command)
X2B
—
Positioning start command (dedicated
instruction)
Commanding positioning start