6SEQUENCE PROGRAM USED FOR POSITIONING CONTROL

6.2 List of devices used

MELSEC-Q

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

name

Device

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

 

 

 

 

 

 

 

 

 

 

Input

X8

X9

 

XA

XB

Error detection signal

Error detected

 

 

 

 

 

 

 

 

 

Inputs/

 

XC

XD

 

XE

XF

BUSY signal

BUSY (operating)

 

 

 

 

 

 

 

 

 

X10

X11

 

X12

X13

Start complete signal

Start completed

outputs

 

 

of

 

X14

X15

 

X16

X17

Positioning complete signal

Positioning completed

QD75

 

 

Y0

 

 

PLC READY signal

PLC CPU preparation completed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Out-

Y4

Y5

 

Y6

Y7

Axis stop signal

Requesting stop

 

 

 

 

 

 

 

 

 

Y8

YA

 

YC

YE

Forward run JOG start signal

Starting forward run JOG

 

put

 

 

Y9

YB

 

YD

YF

Reverse run JOG start signal

Starting reverse run JOG

 

 

 

 

 

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

External

X26

 

 

 

 

Speed-position switching operation

Commanding speed-position switching

 

 

 

 

command

operation

input

 

 

 

 

(command)

X27

 

 

 

 

Speed-position switching enable

Commanding speed-position switching

 

 

 

 

 

 

command

enable command

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X28

 

 

 

 

Speed-position switching prohibit

Commanding speed-position switching

 

 

 

 

 

 

command

prohibit

 

 

 

 

 

 

 

 

 

X29

 

 

 

 

Movement amount change command

Commanding movement amount

 

 

 

 

 

 

 

 

change

 

 

X2A

 

 

 

 

High-level positioning control start

Commanding high-level positioning

 

 

 

 

 

 

command

control start

 

 

 

 

 

 

 

 

 

X2B

 

 

 

 

Positioning start command (dedicated

Commanding positioning start

 

 

 

 

 

 

 

instruction)

 

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Mitsubishi Electronics QD75D, QD75P user manual List of devices used