Protocol FlexiPOS - Vectron Systems AG

• Nothing
• Format:
STX = 1 byte
“VR” = 2 bytes
ETX = 1 byte
LRC = 1 byte
• Possible answers:
• Logout (from POS)
• Purpose:
ACK = OK
NAK = Message invalid (format or LRC)
• Deactivates the external device in situations where the POS can not process
an information (e.g. in programming mode)
• Contents:
• Nothing
• Format:
STX = 1 byte
“VO” = 2 bytes
ETX = 1 byte
LRC = 1 byte
• Possible answers:
ACK = OK
NAK = Message invalid (format or LRC)
• Display update (from POS)
• Purpose:
• Transmits display contents
• Contents:
• Delete mode:
• 0: first numeric key pressed erases whole display
• 1: first numeric key pressed erases bottom line only
• Data length (for 2 lines)
• Data (for 2 lines)
• Format:
STX = 1 byte
“VD” = 2 bytes
Delete mode = 1 byte
Data len line 1 = 2 bytes
Data line 1 = ??? bytes
Data len line 2 = 2 bytes
Data line 2 = ??? bytes
ETX = 1 byte
LRC = 1 byte
Protocol FlexiPOS Jul, 08 1999 3/3