Manual

RS232 PROTOCOL
The RS232 works on a simple command data structure. The basic structure is:
[:] [cmd] [data] [bcc] [\n]
: Start of transmission, 1 byte
cmd Command Code, 1 byte
data Data or instruction
bcc Block check character, 1 byte
\n End of transmission, 1 byte
Command Codes:
The MFX has 4 basic command codes as follows:
01h Set flow data
05h Return flow data
11h Preset Non-volatile data
15h Return Non-volatile data
01h Set Flow Data: The data byte instructs the MFX processor to send flow data automati-
cally or to stop automatic sending. Automatic flow data is sent once per second as a
contiguous string followed by a \n. No bbc is returned
Data Information to be returned
10h Return velocity at 1 second intervals [:] [S] [+xx.xx]
11h Return flow rate at 1 second intervals [:] [F] [+xxxx.xx]
12h Return totallizer at 1 second intervals [:] [T] [+xxxxxx]
13h Return conductivity after being calculated [:] [Y] [xxxx]
1Fh Clear automatic sending
05h Return Flow Data upon request: The data byte instructs the MFX processor to return
the flow data specified in the data byte. Flow data is sent once. No bbc is returned.
Data Information to be returned
10h Return velocity [:] [S] [+xx.xx] [\n]
11h Return flow rate [:] [F] [+xxxx.xx] [\n]
12h Return totallizer [:] [T] [+xxxxxx] [\n]
13h Return last conductivity [:] Y] [xxxx] [\n]
11h Preset Non-Volatile Data: This command, followed by 82 bytes of hex data will preset
the MFX programming registers to match the incoming data. The data structure is listed
later as NVD.
[;] [11h] [data] [data]......................[bbc] [\n]
15h Return Non-Volatile Data: this command will be cause the MFX to respond with
the data contained in the programming registers. The data structure is listed later as
NVD.
[:] [15h] [bbc] [\n]
RS232 COMMUNICATIONS PROTOCOL
RS232 Communications Protocol
Software Version: 08-01-2000
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