Mitsubishi-electric QJ71C24N Manuel d'utilisateur télécharger pdf (Page 124)

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MELSEC-Q

6 DATA COMMUNICATION USING THE NON PROCEDURE PROTOCOL

• If the next data (LF, etc.) is not received within the time set in the non

reception monitoring time (timer 0) after CR is received, the Q series

C24 stores the received data up to CR to the buffer memory receive

data storage area and turns on the following signals to the PLC CPU.

When non procedure and non reception monitoring time format is 0:

Reception abnormal detection signal (X4/XB)

When non procedure and non reception monitoring time format is 1:

Reception data read request signal (X3/XA)

Reception abnormal detection signal

(X4/XB)

Timer 0

set time

Q series C24

External device

( 2)

[Format is 0]

Reception data read reqest signal

(X3/XA)

[Format is 1]

1 In non procedure protocol, a message is received by the increase in

non reception monitoring time (timer 0) if the received complete code

and the received data count are not decided.

For the non procedure protocol at the non reception monitoring time

format, see Chapter 6 of the User’s Manual (Application).

2 CR is included as 1 byte of data included in the message.

2) When the receive complete code is changed and an arbitrary code is

designated (00

designated)

(User defined receive complete code data is added to the end of the

message and sent from the external device).

When the Q series C24 receives the receive complete code data

changed by the user, it stores the receive data up to the receive complete

code to the buffer memory receive area and turned on the read request

signal to the PLC CPU.

External device

Reception data request signal

(X3/XA)

Receive complete code data

Q series C24

3) When receive complete code not designated (FFFF

designated)

Reading by received data count is enabled.

See (2) for a description of reading by received data count.

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Mitsubishi-electric QJ71C24N Manuel d'utilisateur Page 124

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Mitsubishi-electric QJ71C24N Manuel d'utilisateur Page 124

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