6-12
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Section Topics
2308-900-01 Rev. A / July 2008
Section 6: GPIB Operation
Model 2308 Portable Device Battery/Charger Simulator User’s Manual
Message exchange protocol
Two rules summarize the message exchange protocol:
Rule 1:
You must always tell the power supply what to send to the computer.
Rule 2:
The complete response message must be received by the computer before another
program message can be sent to the power supply.
The following two steps must always be performed to send information from the instrument to the
computer:
1. Send the appropriate query command(s) in a program message.
2. Address the power supply to talk.
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