How to reset printhead counter after changing printhead at GoDEX printer

With command ^XSET,TPHLENGTH customer can see current lenght and history of changing printheads if any exist

In this case from picture above we can see that there is no history of changing TPH - this just means that next command was not send when 
printhead was changed. Here we introduce command: ^XSET,TPHLENGTH,0  with which we reset counter for printhead

And if we check again status from printhead counter we can see that it was restart and first value (how many meters printhead was printed) was saved.

This command works on V1.130v or later versions; V2.110s or later versions; FW V4.010j or later versions;

This command does not need to used on EZ2x50i & EZ6x50i and printheads for those printers have IC where is written this info and with command: 

~~INTERNALCOMMANDT1 the LCD shows two values. First - how meters was print this particular printhead and second - how many meters print printer.