Checksum variable?

[G-T069]

I have a Mini One R50 series year 2002) with ecu Siemens S118012001L.
Doing two successive readings without having to turn on the engine the Checksum with ECM Titanium does not change, and readings interspersed with a more or less long of the car, damage checksum is different, with differences in the path between the addresses 003fff, and 005800.
These changes are related to adjustments to the ecu?
If so is reading and writing must be done immediately without using the car or put the bike worth the risk of a crash due to changed Checksum or what it should not create problems in the process of writing?

[ugoboss]

you should see the area in which they are made these changes, I see no reason that will change the cks, and in any case, if this were the case would not affect mass in motion.

[G-T069]

But the fact that the layout of the map changes as you can justify (the variations are always between 003fff, and 005800, then in the first part)?
It is possible that the ecu re-write in the Eeprom by itself by changing the map to fit the style guide?
With regard to the CKS for the first time ECM Titanium has given me 201F, a second 378E, a third DE64, a fourth 37CF (a fourth bis or re-reading is made without turning on the engine, instead it gave me back 37CF).
The reference driver that the ECM is giving me, instead, is always the same.

[tranky]

G-T069 modification of the values on that range could be the adaptation to the style of the guides, and there is, regarding the cks if ECM Titanium you shoot an error, I don't see the problem. On the "quick Guide to the use of ECM Titanium," you have :
"Section 8 - How to make a valid file that is modified using the correction of the Checksum"
..that you should read as you have families of cks.
I hope I was of help!