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Showing results for tags 'Checksum'.
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Hello everyone. I'm looking for a way to certify that a program running on a PLC is the same as some project file (.vlp). Some type of signature CRC. The tool "VisiDiff" doesn't support V130 nor V350. (the two versions that I use) I've found an SDW value tagged as "Signature Log Checksum", that I think is the key that I need, but this value is always 0, and the help doesn't say anything about it. Can anyone help? Regards, Javier.
Hello, I've got a problem with the SEND block of the PROTOCOL FB's, I need to calculate the checksum according to CRC-16 algorithm with initial value 0x0000, but the only available option is CRC-16 (Modbus) where the initial value is 0xFFFF. Is there a way to change the initial value, or add this checksum algorithm? Another problem is the order bytes in the calculated checksum, maybe you could add an option to swap bytes?