IS1000 – Configuration Guide 10
START OF CONFIGURATION END OF CONFIGURATION
2.1.7. ACK/NAK Protocol
Once this protocol is activated, the decoder waits for an acknowledgment from the
host system:
ACK (06 hexa) means: message correctly received by the host system.
NAK (15 hexa) means: message incorrectly received by the host, upon
reception of this character the decoder resends the
message.
2.1.8. XON/XOFF Protocol
Using this protocol, the host system can control the data flow coming from the
decoder:
XON (11 hexa) means: host system ready to receive data.
XOFF (13 hexa) means: host system busy, the decoder stops the transmission
and waits for an XON.
2.1.9. RTS/CTS Protocol
This protocol is a hardware "handshake" between the decoder and the host
system. Before transmitting data, the decoder rises its RTS signal (pin 4) to +10
volt and waits for a +10 volt signal on its CTS (pin 5) from the host. The rest
position of the two pins is -10 volt.
ACK/NAK DISACTIVATED * ACK/NAK ACTIVATED
XON/XOFF DISACTIVATED * XON/XOFF ACTIVATED
RTS/CTS PROTOCOL DISACTIVATED * RTS/CTS PROTOCOL ACTIVATED