CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
- CONTROL graphics
- CONTROL Functions
  - Funtions A
  - Funtions B
  - Funtions C
  - Funtions D
  - Functions E
  - Functions F
  - Functions G
  - Functions H
  - Functions I
  - Functions J
  - Functions K
  - Functions L
  - Functions M
  - Functions N
  - Functions O
  - Functions P
  - Functions Q
  - Functions R
  - Functions S
  - Functions T
  - Functions U
  - Functions V
    - v24Close()
      Closes the interface.
    - v24Open()
      Opens a serial interface with a defined baudrate.
    - v24Read()
      Reads from the interface.
    - v24Write()
      Writes data to the interface.
    - verifyOSUser()
      The function verifyOSUser() returns TRUE (in the &result parameter) if the user with the defined user name exists, the account of the user is not locked or disabled and the specified password is correct. The default user is the current operating system user.
  - Functions W
  - Functions X
  - Functions Y
  - Functions Z
- CTRL Debugger
  With the CTRL Debugger you can debug the programming language Control.

v24Read()

Reads from the interface.

Synopsis

int v24Read( int handle, string/blob &value, time timeout);

Parameters


Parameter	Description
handle	The handle of v24Open.
&value	A string or blob, which contains the values. Strings are automatically closed with a 0 byte.
timeout	The maximum time the system waits for data. The script stops for this time range.

Return value

-1 if an error occurs, otherwise 0.

Error

Missing or wrong arguments.

Description

Reads from the interface.

Example

main()
{
  string v24message, sTemp;
  int timeout = 2; // 2 seconds
  int read;
  do
  {
    sTemp = "";
    read = v24Read(handle, sTemp, timeout);
    v24message += sTemp;
  }
  while(strlen(sTemp) > 0);
}

Assignment

Communication functions, Waiting Control functions

Availability

CTRL