Protocol FlexiPOS - Vectron Systems AG

STX = 1 byte
“VG” = 2 bytes
Device = 1 byte (‘0’ to ‘9’)
Product number = 5 bytes (‘00001’ to ‘99999’)
ETX = 1 byte
LRC = 1 byte
• Possible answers:
Example
ACK = OK
NAK = Message invalid (format or LRC)
Sample sequence (with several error situations):
POS: Login
Ext. Dev.: Login acknowledge
POS: Display update; Set input mode (numeric); Set status mode
Ext. Dev.: Input event: Dallas serial number
POS: Display update;
Ext. Dev.: Input event: Table number
POS: Display update: error message “invalid table number”; Beep
Ext. Dev.: Input event: Table number
POS: Display update: Table name and balance
Ext. Dev.: Product request: Pourer, PLU 123
POS: Display update: “Invalid PLU”; Product acknowledge: not allowed;
Beep
Ext. Dev.: Product request: Pourer, PLU 100
POS: Display update: PLU name, available sizes; Product acknowledge:
timing value
Ext. Dev.: Input event: Soft key for other size
POS: Display update: PLU name, available sizes; Product acknowledge:
timing value
Ext. Dev.: Product registration
Ext. Dev.: Input event: Table key
POS: Display update: Table name and balance
Protocol FlexiPOS Jul, 08 1999 8/8