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Function Descriptions Appendix C
•Example
For further information and precautions on related Auxiliary Area flags, refer to the section on TXD Serial Com-
munications Instruction in the CS/CJ-series Instruction Reference Manual.
TXD_SCB: Send String via Serial Port on Serial Communications Board
• Function
Sends a text string from a serial port on a Serial Communications Board (SCB).
• Application
TXD_SCB (Send_string, Serial_port);
• Conditions
The serial communications mode of the serial port must be set to no-protocol communications.
• Arguments and Return Values
Related Auxiliary
Area Flag
Address Description
RS-232C Port Send
Ready Flag
A392.05 ON when sending is enabled in no-protocol mode.
Variable name Data type Description
Send_string STRING Specifies the text string to send.
Serial_port INT, UINT, WORD Specifies the number of the serial port.
1: Serial port 1
2: Serial port 2
Variables
BOOL DoSendData (* Variable to control send function *)
INT iProcess (* Process number *)
STRING Message (* Send message *)
BOOL SendEnableCPUPort (* Send Ready Flag *) AT A392.05
2: (* Execute send function if sending is enabled *)
IF SendEnableCPUPort = TRUE THEN
TXD_CPU(Message);
iProcess := 3;
END_IF;
(* Send data when DoSendData is ON and iProcess is 0 *)
IF (DoSendData = TRUE) AND (iProcess = 0) THEN
END_IF;
(* Execute send processing according to process number *)
CASE iProcess OF
iProcess := 1;
DoSendData := FALSE;
1: (* Create send text data *)
Message := '@READ';
iProcess := 2;
CPU Unit
Barcode Reader
3: (* Sending is finished if Send Ready Flag is ON *)
IF SendEnableCPUPort = TRUE THEN
iProcess := 0;
END_IF;
END_CASE;
Get Scene Number
command: @READ
RS-232C
port
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