Mitsubishi-electric QJ71C24N Manuel d'utilisateur télécharger pdf (Page 145)

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MELSEC-Q

6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL

(2) Transmission data arrangement

The following example shows an arrangement of the transmission data to be sent

to the external device when storing it in the transmission area.

(Example) When transmitting "ABCDEFG123" (The transmit area is the default

value.)

CH1 side

address

400

401

402

403

404

405

406

5 or 10

(B)

(A)

(C)

(D)

(E)

(F)

(G)

(1)

(2)

(3)

(5)

(4)

Buffer memory

Transmission data count storage area

In accordance with the word/byte units designation

Word units....5

Bytes units....10

Transmission data designation area

Sequentially store the transmission data to low address (L)

→

(H), next

address (L)

→

(H), in the order of transmission.

6.2.3 Sequence program for transmission data

A sequence program for transmission data is explained below.

For details on the OUTPUT instruction used for data transmission, see Chapter 9.

G.OUTPUT Un D0 D11 M0

M0 M1

(In case of the CH1 side)

Transmission

instruction

Create transmission data from D11

Create control data from D0

Processing for normal completion

Processing for abnormal completion

(retransmission, etc.)

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