Hi I using a musashi dispenser unit with Rs232 for controller pressure and dispense time. I want to write program in Labview for this. They protocol looklike DEFAULT is 19200bps.Data Length: 8 bit Start Bit: 1 bit Stop Bit: 1 bit Parity: None Flow Control: Nonefor instace the Dispense command is stx 04DI_ _(two space) etx the checksum of this command is CF, which is calculate is 00-30("0")-34("4")-44("D")-49("I")-20("SPACE")-20("SPACE")=CF can you guys help me calculate this in labview 8.6 thank you very much

replace your XOr with a subtract node then swap the two inputs to the subtract node. Note: THe for loop will auto indedx the array if you let it. Or you could String >>> String to byte array >>> Sum Array elements >>> XOr with "FF" then add 1. Ben

LabVIEW

checksum

Solved!

make your "FF" a U8 to get rid of the coercion dot.

Ben

Retired Senior Automation Systems Architect with Data Science Automation LabVIEW Champion Knight of NI and Prepper LinkedIn Profile YouTube Channel

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i do not understand what you mean, how to make FF a U8

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Right click the constant, Representation, pick U8.

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hI BEN

can you explain to me why connect FF with the XOr

thank you

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LabVIEW

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