SendString

SendString sends a character string to the interface that corresponds to the input variable TxBuffer (of type ComBuffer).

	Alternative SendString has a standard length of 80 characters. For some applications a longer string is desirable. In this case the function block SendString255 can be used. The only difference is a string length of 255 characters compared to SendString.

Inputs

VAR_INPUT
  SendString         : STRING;
END_VAR

Name	Type	Description
SendString	STRING	The character string to be sent.

VAR_IN_OUT
  TxBuffer         : ComBuffer;
END_VAR

Name	Type	Description
TxBuffer	ComBuffer	Send data buffer that corresponds to the interface used.

VAR_OUTPUT
  Busy            : BOOL;
  Error           : ComError_t;
END_VAR

Name	Type	Description
Busy	BOOL	For as long as the output `Busy=TRUE`, the transmission is not completed. The data has successfully been sent when `Busy=FALSE` and `Error=0`. The output Busy does not become TRUE, if the data could already be sent with the first call. `Busy` becomes FALSE as soon as the data has been sent or an error or timeout has occurred.
Error	ComError_t	If a fault occurs, `Error` will contain an error code.

Name

Type

Description

Busy

BOOL

For as long as the output Busy=TRUE, the transmission is not completed. The data has successfully been sent when Busy=FALSE and Error=0.

The output Busy does not become TRUE, if the data could already be sent with the first call.

Busy becomes FALSE as soon as the data has been sent or an error or timeout has occurred.

Error

If a fault occurs, Error will contain an error code.

Development environment	Target platform	PLC libraries to include
TwinCAT v3.1.4012	PC or CX (x86, x64, Arm®)	Tc2_SerialCom