Hello, I am running continuous control and queries to a Kepco BOP 36-12M power supply with BIT 488-B interface. When I run it in a monitor/control loop alone everything is fine, indefintely. However when I combine this with other monitor loops queriying other devices on the bus, I eventually get a hard lockup of the Kepco device -- this can happen anywhere between 15 minutes to hours later. the Kepco will no longer even respond to even an IDN? query once everthing else is turned off. When this occurs, the only solution seems to be to power-cycle the Kepco. I have captured output using a bus analyzer and see timeout events for many instruments including the Kepco which seems a nominal case since the system is using asynchronous transactions. Anyboday have issues like this? I am using Windows XP with LabView 8.6 and the accompanying NI tools.
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