13COMMON FUNCTIONS

[4]Execution data backup method

MELSEC-Q

(1)Execution data backup (writing to the flash ROM) is carried out using the dedicated instruction "PFWRT". (Refer to Chapter 14 "Dedicated instructions" for details.)

(2)Refer to Section 7.2 "Data transmission process" for the data transmission processing at the backup of the execution data.

(3)Execution data backup can also be carried out by the writing of the data shown in the table below to the QD75 buffer memory using the TO command/intelligent function device.

The writing to the flash ROM is executed at the time point the data is written to the QD75 buffer memory.

 

 

 

 

Setting

 

Buffer memory address

 

 

 

Setting item

Setting details

Axis

Axis

Axis

Axis

 

 

 

value

 

 

 

 

 

1

2

3

4

 

 

 

 

 

 

 

 

 

Flash ROM write

 

 

 

 

 

 

Cd.1

1

Set "1" (flash ROM write request).

 

1900

 

 

 

 

request

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refer to Section 5.7 "List of control data" for details on the setting details.

When the writing to the flash ROM is complete, "0" will be set in " ROM write request" by the QD75 automatically.

Cd.1

Flash

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Mitsubishi Electronics QD75P, QD75D user manual Execution data backup method, Flash