User`s manual

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CHAPTER 11 DATA COMMUNICATIONS USING USER FRAMES

11.5 Transmission Program

The following are examples of a sequence program when the user frame (four) and transmission area data are

transmitted.

In the description of the sample programs, data transmission using user frames is described for the following

conditions case:

• The Q series C24 I/O signals: The Q series C24 installed at QCPU I/O signal addresses X/Y80 to X/Y9F.

• The Q series C24 interface used in data communications with the external device: The Q series C24 CH1

RS-232 interface

• Switch setting using GX Developer: Set the following setting values on the "intelligent functional module

switch setting" screen.

• Data to be registered on the GX Configurator-SC's "Transmission control and others system setting" screen

and the "Non procedure system settings" screen for data communication via user frames

• Change the default values for the items listed in the table below.

• Use default settings for other items.

• In example of Page 295, Section 11.5 (2), the transmission frame No. is not registered using the GX

Configurator-SC. (It is registered using a sequence program.)

Setting item Setting value Remarks

Switch 1

CH1 Transmission setting

Set according to the external device. 

CH1 Communication rate setting

Switch 2

CH1 Communication protocol

setting

0006H Nonprocedural protocol

Switch 3

CH2 Transmission setting

0000H

Not used

CH2 Communication rate setting

Switch 4

CH2 Communication protocol

setting

0000H

Switch 5 Station No. setting 0001H

Q series C24 station No.

(used in the user frame)

Item Set contents

Buffer memory address to

store registration value

Remarks

Word/byte units designation Byte 96H 

Send transparent code designation No 11FH

Additional code: 10H (DLE),

Transparent code: 02H (STX)

ASCII-BIN conversion designation Disable 121H 