Hallo, I also have problem regarding reading command frame through the modem with RS232 cable . the problem is I am making a software which reads a data from telemetry and have 2 command frame and as soon I received perfect command frame I have to reply with status frame. I have define all protocol and there is a communication but not in a smooth manner I tried to search shot out by searching 1st character for e.g.: it started with FFFF.........................................................................AAAA 0000 FFFF..................................................................AAAA 0000 command frame looks like this way in total 84 bytes. some time I get a perfect one and some time it missed the data.although I am giving visa read 84 bytes the frame is incomplete. when I get a prefer command frame there is communication now the problem is the command frame after certain time it is incomplete i.e., normally it should be 84 bytes but after some time it shifted I don't know how to solve this problem It would be nice if anyone help me out thanking you.

@kalu wrote: Thanks Jeff Bohrer you mean I should remove sequence frame and replace wait with time delay?????? best regards That and stop playing with CTS-RTS hardware flow control will do it for you

LabVIEW

Visa read doesn't read as specified in bytes read

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LabVIEW

Visa read doesn't read as specified in bytes read

Re: Visa read doesn't read as specified in bytes read