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Channel: Instrument Control (GPIB, Serial, VISA, IVI) topics
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Bytes at port outputs all bytes but Visa Read doesn't see them

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Hello. I have a display connected to a PC via RS232 port. With a VI I want to extract all the bytes stored on display's memory. I've disabled termination character in VISA Configure serial port as seen in other topics. When Bytes at port isn't connected to Visa Read, it outputs 387 bytes and Visa Read outputs the number I specify at byte count terminal. When these two are connected, Visa Read outputs at read buffer terminal the message Unknown Command and at return count terminal the result 22. Can someone explain why those 387 bytes aren't seen by the Visa Read when connected to Bytes at port? Thanks in advance.

 

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