Calculating the check sum in data

[tidalbobo]

I am writing a software to read the data obtained from a DASTA 710/720 device (http://www.aimil.com/Products.aspx?Product_Id=1362) via the COM/Serial port.

This sends a data string of the type
7A 30 30 32 37 32 36 32 31 41 AB 77 ==> z00272621A«w => z 0.027262V 1 A checksum
7A 30 30 32 36 36 35 32 33 41 9A 6F ==> z00266523Ašo => z 0.026652V 3 A checksum

The last 2 bytes ( 16 bits) are supposed to be the check sum. This is shown in green. How ever I am not able to find the algorithm used.

I need to know the algorithm used to generate the check sum, so that I can verify that the data is accurate.

Any help is very much appreciated.

Rgds
Gayan

[tom jupille]

Have you asked Aimil?

[aceto_81]

There are lots of check sum algorithms in the world, so I think Tom's reply is correct: ask them.
Otherwise it will be searching for lots of algorithms, implement them and hope you will find it.

Ace

[tidalbobo]

Have you asked Aimil?

I did try contacting them.
The reply I got was "We are not aware about such algorithm."
They seem rather unresponsive and clueless.