Xylem XL Series H-522 - Plus - Manual (Page 50)

5-4 Miscellaneous System Setup
XL™ Series
5 - The XL will save a configuration file on the internal data card called update.cfg. Then
the XL will list the files on the ATA card and allows the user to use the Up and Down
arrow keys to select the desired bin file. Press the ENTER key to accept the selected file.
6 - The XL will erase the main program memory and then loads in the new firmware.
7 - When the new firmware is done loading the XL will initialize new variables. This makes
sure any new variables associated with the new version of firmware is in an acceptable
range. This actually resets every option to the factory default value.
8 - Last of all the XL will reload the update.cfg file to set up the unit as close to the same
mode it was before the update started.
9 - The user should look over the settings to verify they look as expected.
10 - To make sure the new version was loaded correctly and to check the RAM run a
checksum test and make sure it passes and that it indicates the stack is ok. If the
checksum test fails try reloading the firmware again. If the stack is bad then cycle power
to the unit and try the test again.