I am using IQ01 to create serial number. Equipment is not getting created due to configuration setting w/o equipment in serial number profile.
Equipment category is assigned to serial profile with internal number range for equipment category.
But still i can give any external number for serial number creation.
I know there is number range setting can be done for material serial number. SAP system adds 1 to the last SERNR for that material based on value in Table MASE.
Regards
Sunil