1PRODUCT OUTLINE

1.2.3 Outline of stopping

MELSEC-Q

Each control is stopped in the following cases.

(1)When each control is completed normally.

(2)When the drive unit READY signal is turned OFF.

(3)When a PLC CPU error occurs

(4)When the PLC READY signal is turned OFF.

(5)When an error occurs in the QD75.

(6)When control is intentionally stopped (Stop signal from PLC CPU turned ON, stop signal from an external device, etc.)

The outline for the stopping process in these cases is shown below. (Excluding (1) for normal stopping.)

 

 

 

 

 

Axis

 

 

 

 

Stop process

 

 

 

 

 

M code

operation

OPR control

 

 

 

 

Manual control

 

 

 

 

status

 

 

 

 

 

 

Stop

 

 

 

Major

 

High-level

 

Manual

Stop cause

ON signal

 

after

Machine

Fast

 

JOG/

 

 

axis

after stop

stopping

positioning

positioning

pulse

 

 

 

 

 

 

 

OPR

OPR

control

 

control

Inching

generator

 

 

 

 

(

 

)

control

control

 

operation

 

 

 

 

Md.26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

operation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drive unit

Each

No

During

 

 

 

 

 

 

 

Deceleration

Forced stop

READY

Immediate stop

 

 

 

axis

change

error

 

 

 

stop

 

signal OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Hardware

 

 

 

 

 

Deceleration stop/sudden stop

 

 

 

stroke limit

 

 

 

 

 

 

Deceleration

Fatal stop

Each

No

During

 

 

 

 

 

 

 

upper/lower

(Select with “

 

 

Sudden stop group1

(Stop group 1)

axis

change

error

Pr.37

 

stop

limit error

sudden stop selection” )

 

 

 

 

 

 

 

 

 

 

occurrence

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

PLC CPU

 

No

 

 

 

 

 

 

 

 

 

 

 

 

error

 

 

 

 

 

 

 

 

 

 

 

 

 

 

change

 

 

 

Deceleration stop/sudden stop

 

 

Emergency

occurrence

 

 

 

 

 

 

All

 

During

 

Deceleration

stop

PLC READY

Turns

(Select with “

 

 

Sudden stop group2

axes

error

Pr.38

 

stop

(Stop group 2)

signal OFF

OFF

sudden stop selection” )

 

 

 

 

 

 

 

 

Error in test

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

mode

 

change

 

 

 

 

 

 

 

 

 

 

 

 

Axis error

 

 

 

 

 

 

 

 

 

 

 

 

 

 

detection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Error other

 

 

 

 

 

 

 

 

 

 

 

 

 

Relatively safe

than stop

Each

No

During

 

 

 

 

 

 

 

 

stop

group 1 or 2)

 

 

 

 

 

 

 

 

(Stop group 3)

 

axis

change

error

 

 

 

 

 

 

 

 

“Stop signal”

 

 

 

 

 

 

 

 

 

from

 

 

 

 

 

 

 

 

 

 

 

 

 

 

peripheral

 

 

 

 

 

Deceleration stop/sudden stop

 

Deceleration

 

device

 

 

 

 

 

(Select with “

Pr.39

Sudden stop group3

 

 

 

 

 

 

stop

 

 

 

 

 

 

 

 

"Stop signal"

 

 

 

 

 

sudden stop selection”)

 

 

 

 

 

 

 

 

 

 

ON from

 

 

 

 

 

 

 

 

 

 

 

 

 

 

external

 

 

When

 

 

 

 

 

 

 

 

Intentional stop

source

Each

No

stopped

 

 

 

 

 

 

 

 

(Stop group 3)

"Axis stop

axis

change

(While

 

 

 

 

 

 

 

 

 

signal" ON

 

 

waiting)

 

 

 

 

 

 

 

 

 

from PLC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPU

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Mitsubishi Electronics QD75P, QD75D user manual Outline of stopping