Communicating with Multiple Instruments and/or Multiple Interfaces

When your system includes an interface that must access multiple instruments, use the multi-device NI-488.2 calls, which can perform the following tasks with a single call:

• Find all of the Listeners on the bus using FindListn.
• Find an instrument requesting service using FindRQS or AllSpoll.
• Determine the state of the SRQ line, or wait for SRQ to be asserted using TestSRQ or WaitSRQ.
• Send data bytes to multiple GPIB instruments using SendList.

You can mix board-level traditional NI-488.2 calls with the multi-device NI-488.2 calls to have access to all the NI-488.2 functionality.