The series generator plugin is a basic serial generator.
The plugin will generate consecutive serials, starting from the minimum value you set, to the maximum one.
There is no random in that plugin, it will use a counter (related to the pack) and increment it each time a serial is generated.
If you have several series generators for different packs, each one will be stand alone and have his own counter.
Parameters of the plugin
Min value - The minimum value for this configuration. If empty, the plugin would start to 1.
Max value - The maximum value for this configuration. If empty, there won't have any limitation.
Serial format - You can specify a format (using the sprint format) of your serial. Like "SEAT-%05d" to have serials like "SEAT-00001"