Mitsubishi Electronics AJ65bt-r2 ユーザーズマニュアル

7 - 3

MELSEC-A

7   USING FRAMES WHEN EXCHANGING DATA

(1)   Transmitting with a frame added

By designating the No. of the frame to be added in 

R 2

 118

H

 and 

R 2

 119

H

, the

frame will be automatically added when transmitting.
The data transmission method is the same as when a frame is not added (non-
procedural communication), so refer to Chapter 6.

POINT

Make sure not to include data with the same arrangement as the transmission
head frame and transmission end frame in the random data section.
If data with the same arrangement as the transmission head frame or
transmission end frame is contained in the random data section, the partner
device may incorrectly recognize that data as the transmission head frame or
transmission end frame.

(2)   Setting the buffer memory

The items to be set for the buffer memory used when transmitting data using the
transmission frame 1 area are shown below.

R2 buffer memory

address

Name

Details

R 2

 118

H

Transmission head
frame No.

When transmitting frames using the transmission frame 1 area, designate
the No. of the frame for the data to be transmitted as the head frame.

0

H

 (0)

: No designation (default value)

1

H

 to 161

H

 (1 to 353)

: Designate default registration frame

3E8

H

 to 4AF

H

 (1000 to 1199) : Designate user registration frame

R 2

 119

H

Transmission end
frame No.

When transmitting frames using the transmission frame 1 area, designate
the No. of the frame for the data to be transmitted as the end frame.

0

H

 (0)

: No designation (default value)

1

H

 to 161

H

 (1 to 353)

: Designate default registration frame

3E8

H

 to 4AF

H

 (1000 to 1199) : Designate user registration frame