Measurement-computing GPIB-488 Manual de usuario descargar pdf (Pagina 112)

Appendix C IBERR

Programming Reference Manual C-6 GPIB-488

ESRQ—SRQ in "ON" position

Cause: A wait for an RQS can not occur because the GPIB SRQ line is ON.

Solution: Verify the following:

• Ignore the ESRQ until all devices are found.

•Make sure

ibdev is called to open all devices on the bus

capable of asserting SRQ.

• Test that each device is unasserting SRQ.

• Check the cabling. Make sure that all devices are attached

and the connectors are seated properly.

ETAB—Table problem

Cause: There was a problem with a table used in a FindLstn or FindRQS.

Solution: • If the error occurs during a FindLstn, this is a warning

and not an error. Ignore the warning or make the buffer

larger.

• If the error occurs during a

FindRQS, then none of the

specified devices are requesting services. Verify that the

device list contains the addresses of all online devices.

EHDL—Invalid handle

Cause: EHDL results when an invalid handle is passed to a function call.

Solution: • Do not use a device descriptor in a board function or

vice-versa.

• Make sure that the board index passed to the call is valid.

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Measurement-computing GPIB-488 Manual de usuario Pagina 112