Adding Slave Unit
In order to add slave unit, go to Configuration -- Setting --Vending page.
Change device count from 1 to 2 and press Update.
New fields for second device (slave) will appear. Fill as follows:
1) Device 2 port - /dev/PCB
2) Device 2 baudrate -- 9600
3) Device 2 address -- 254
Press update and then go to System and restart application.
After restart go to Configuration -- Device and configure 2nd unit.
All further configuration process is described in the Devices section.