General VISA-GPIB Parameters

• Recording
• Actions
• Buffering
• Timeout

Recording
You control how data and event information are saved to a record (disk) file with these parameters:

• RecordName - Specify the name of the record file.
• RecordMode - Specify whether data and event information are saved to one record file or to multiple record files.
  • Overwrite - Overwrite the existing record file.
  • Append - Append data to the current record file.
  • Index - Create a different record file, each with an indexed filename.
• RecordDetail - Specify the amount of information saved to a record file.
  • Verbose - Record the data written to the instrument and the data read from the instrument in addition to recording the information specified by Compact mode.
  • Compact - Record the number of values written to the instrument, the number of values read from the instrument, the data type of the values, and event information.

Actions
While the VISA-GPIB object is connected to the instrument, you can use events to execute an action. You define the actions to execute within an M-file action function.

• ErrorAction - Specify the M-file action function to execute when an error event occurs.
• OutputEmptyAction - Specify the M-file action function to execute when the output buffer is empty.
• BytesAvailable
  • Action - Specify the M-file action function to execute when a specified number of bytes are available in the input buffer, or a terminator is read as defined by the EOSCharCode property.
  • ActionMode - Specify if the bytes-available event is generated after a specified number of bytes are available in the input buffer, or after a terminator is read.
  • ActionCount - Specify the number of bytes that must be available in the input buffer before a bytes-available event occurs.
• Timer
  • Action - Specify the M-file action function to execute when the time specified by TimerPeriod passes.
  • Period - Specify the time, in seconds, that must pass before the action function specified for TimerAction is called. Time is measured relative to when the object is connected to the instrument.

Buffering
Specify the size, in bytes, of the input and output buffer. An error occurs if the data written to or read from the instrument cannot be stored in the buffer.

• InputBufferSize - Specify the total number of bytes that can be stored in the input buffer during a read operation.
• OutputBufferSize - Specify the total number of bytes that can be stored in the output buffer during a write operation.

Timeout
Specify the waiting time, in seconds, to complete a read or write operation. If a timeout occurs, then the read or write operation aborts. If the operation is asynchronous, then an error event is generated.