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Maximum Timeout for GPIB Operations

Primary Software: Driver Software>>NI-VISA
Primary Software Version: 4.5
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
When I try to set a long timeout when using GPIB and VISA, my timeout is limited.  What is the maximum timeout for GPIB communications using VISA?

Solution:
VISA is an abstraction layer over the NI-488.2 drivers.  When setting the timeout using a VISA property node, the call uses ibtmo which has a maximum value of 1000 seconds.

If a longer timeout is needed, perform multiple operations and clear the timeout error between each call.

Related Links:
KnowledgeBase 3JOF9K6K: Why Do I Receive Timeout Error -1073807339 on VISA Write?
KnowledgeBase 0R0FC772: GPIB Timeout Errors (EABO) after Updating to Faster Computers

Attachments:
Extra Timeout.vi




Report Date: 03/06/2009
Last Updated: 03/06/2009
Document ID: 4V5AF53Q

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