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Chapter 35 GPIB 488.2 Functions TestSys Directs multiple devices to conduct IEEE 488.2 self-tests. WaitSRQ Waits until a device asserts Service Request. The function suspends execution until a GPIB device connected on the GPIB asserts the Service Request (SRQ) line. This function is similar in format to TestSRQ, except that TestSRQ returns the SRQ status immediately, whereas WaitSRQ suspends the program for the duration of the timeout period (but no longer) waiting for an SRQ to occur. GPIB 488.2 Low-Level I/O Function Descriptions The low-level functions let you create a more specific, detailed program than higher-level functions. You use low-level functions for unusual situations or for situations requiring additional flexibility. RcvRespMsg Reads data bytes from a previously addressed device. This function assumes that another function, such as ReceiveSetup, Receive, or SendCmds, has already addressed the GPIB Talkers and Listeners. You use RcvRespMsg specifically to skip the addressing step of GPIB management. You normally use the Receive function to perform the entire sequence of addressing and then to receive the data bytes. LabVIEW Function and VI Reference Manual 35-8 © National Instruments Corporation
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