Hello Vadim,
Which version of Standard ERP are you currently using? The order numbers should be automatically populated.
Is your number series setting for Orders filled in? To check, you can navigate to:
Modules >> Sales Orders>> Settings >> Number Series - Orders
You can then personalise your own From and To numbers (Such as 10000000001 to 99999999999). You can set the dates From and To, which will be the dates this number series starts and ends.
For more Information, I have linked the manual down below for Number Series in the Sales Order Module:
http://hansamanuals.com/main/english/mailnumber___58819/theconf___477/manuals/levelzero___58819/version___81/hwconvindex.htm
Kind Regards,
Standard Accounts Support Team