Mitsubishi-electric QJ71C24N Manuel d'utilisateur télécharger pdf (Page 112)

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MELSEC-Q

4 SETTINGS AND PROCEDURES PRIOR TO OPERATION

(Procedure 5) Ending the loopback test

Perform the following procedure according to the function used, and start data

communication.

• Set the switch settings with GX Developer according to the procedure specified in

Section 4.5.2.

• Turn on the power to the station on which the Q series C24 is installed.

An example of control procedure when the TT command is used in the loopback

test mentioned in Procedure 3.

(Station number: 00, sum check code: Yes)

PLC CPU side

(Example)

(Data name)

External

device side

Header data sent

by the external device

TT (ACPU common command)

Two characters (hexadecimal) … Designate the number of characters (1 to 254) of return data to be

sent immediately afterward.

Designate with a text string consisting of "0" to "9" and "A" to "F" (capital letter)

(In case of format 1)

Two characters (hexadecimal)

Character A part

Becomes the

same data

Header data to be sent by

the PLC CPU

Character B part

AB CDE

Station No.

PC No.

Command

Message wait

Character length

Loopback data

data with the

length given

by Character

length

Sum check

code