Appendices
D-4
Figure12-2 L1- L8 demonstration
Programming
If the Handshake is off, BC-3000 Plus will transmit the body of the text without acknowledging
the presence of an external computer.
If the Handshake is on, BC-3000 Plus will communicate with the external computer in
following procedures:
1. BC-3000 Plus sends an ENQ (05 Hex), then waits up to 4 seconds for the external
computer to respond. If the external computer does not respond, then one more ENQ (05
Hex) is tried. If it fails again, the analyzer aborts the transmission and reports a
transmission error;
2. The external computer must respond by sending an ACK (06 Hex). If any other response
is received, another ENQ (05 Hex) will be sent by the analyzer (maximum two ENQ [05
Hex] will be sent);
3. The analyzer then sends：
Body of text
EOT (04 Hex)
ETX (03 Hex)
4. Disconnection.
BC-3000 Plus sends an ETX 03 Hex), then waits 4 seconds for the external computer to
respond. If no response is received, one more ETX (03 Hex) is sent, BC-3000 Plus waits 4
seconds before giving up and gives alarm of communication error.
To Next Page
Loading...
