Annex C Protocol
67
Annex C Protocol
Guide:
Caution! For communication between the analyzer and
PC, be sure to guarantee:
1. The RS232/485 address setting is consistent with those of PC!
2. The RS232/485 baud rate setting is consistent with those of PC!
3. The PC shall send command in Format of Download Command!
Otherwise, the communication will fail!
C.1 Handshake Protocol
In the monitoring network consisting of the master and the slave (as shown in Figure C-1-1), a
communication starts from the download command initiated by a master, and ends as the slave
answers. Therefore, one-way handshake protocol is adopted, that is, only the upload data of the
clave contains the information on whether the data received by the slave is correct. The PC will
determine whether the master will re-send the control command based on this information. After
receiving the upload data from the slave, the master will determine whether the data is uploaded
correctly according to the carried check word. If it is incorrect, resend the command to the slave.
Figure C-1-1 Handshake protocol
C.2 Ports
Adopting 9-pin D-sub socket, defined as shown in Figure C-2-1.
Figure C-2-1 Communication port
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