Protocol FlexiPOS - Vectron Systems AG

NAK 0x15
Messages
• Login (from POS):
• Purpose:
• Activates the external device
• Contents:
• Nothing
• Format:
Possible answers:
STX = 1 byte
“VL” = 2 bytes
ETX = 1 byte
LRC = 1 byte
Login Acknowledge = Normal answer (see below)
NAK = Message invalid (format or LRC)
• Login acknowledge (to POS):
• Purpose:
• Acknowledges the login
• Transmits the version numbers
• Contents:
• Main version
• Sub version
• Format:
STX = 1 byte
“VA” = 2 bytes
Main version = 2 byte (‘00’ to ’99’)
Sub version = 2 byte (‘00’ to ’99’)
ETX = 1 byte
LRC = 1 byte
• Possible answers:
ACK = OK
NAK = Message invalid (format or LRC)
At now the version numbers aren’t checked if they are valid.
• Reset (from POS):
• Purpose:
• Reset after error conditions to set system into a well defined state (Clear
display, reset input mode etc.)
• Contents:
Protocol FlexiPOS Jul, 08 1999 2/2