6SEQUENCE PROGRAM USED FOR POSITIONING CONTROL

6.5.5 Restart program

MELSEC-Q

When a stop factor occurs during position control and the operation stops, the positioning can be restarted from the stopped position to the position control end point

by using the "restart command" (

Cd.6

Restart command).

("Restarting" is not possible when "continuous operation is interrupted.")

[1] Restart operation

Axis 1

Positioning with positioning data No. 11

Positioning data No. 11

continues with restart

command

Positioning with positioning data No. 12

Stop with stop command

Positioning with positioning data No. 10

Axis 2

Fig. 6.13 Restart operation

[2]Restrictions

(1)Restarting can be executed only when the " Md.26

Axis operation status" is

"stopped".

If the axis operation is not "stopped", restarting is not possible.

(2)Do not execute restart while the stop command is ON.

If restart is executed while stopped, an error "Stop signal ON at start" (error

code: 106) will occur, and the "

Md.26

Axis operation status" will change to

"error occurring".

Thus, even if the error is reset, the operation cannot be restarted.

(3)Restarting can be executed even while the positioning start signal is ON. However, make sure that the positioning start signal does not change from OFF to ON while stopped.

If the positioning start signal changes from OFF to ON, positioning will start from the positioning data No. of designated point's positioning data No. set in

"

Cd.3

Positioning start No.".

(4)If positioning is ended with the continuous operation interrupt request, the operation cannot be restarted.

If restart is requested, a warning "Restart not possible" (warning code: 104) will occur.

(5)When stopped with interpolation operation, write "1: Restarts" into

" Cd.6

(6)If the "

Restart command" for the reference axis, and then restart. Md.26 Axis operation status" is not "stopped" when restarting, a

warning "Restart not possible" (warning code: 104) will occur, and the process at that time will be continued.

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Mitsubishi Electronics QD75D, QD75P user manual Restart program, Restart operation, Cd.3, Stop with stop command