Contrive QBK, Manual

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© 2016 CONTRIVE • B14 88| QBK .EN
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FIELDBUS REMOTE CONTROL
TraxBus using busbars or single wire lines
Ref. to TraxInterface literature for wiring details
Complete remote control and supervision is possible
through built-in serial communication interface using
proprietary fieldbus, designed for reliable operation in
harsh industrial environments with simplified wiring.
Communication protocol could be easily implemented
into any programmable controller for great efficiency
and low cost. Ready to use gateways are available to
convert TraxBus into standard industry fieldbus systems.
See below for typical communication time at different
baud rates.
Any supervisor takes some time for internal process, real
performance of the fieldbus should be computed adding
such delay.
POLLING TIME FOR 1 BURNER
4800 9600 19200 38400
COMMAND
15 ms 8 ms 4 ms 2 ms
QBK PROCESS
4 ms 4 ms 4 ms 4 ms
ANSWER
15 ms 8 ms 4 ms 2 ms
OVERALL
3 4 ms 20 ms 12 ms 8 ms
POLLING TIME FOR 10 BURNERS
4800 9600 19200 38400
COMMAND
150 ms 80 ms 40 ms 20 ms
QBK PROCESS
40 ms 40 ms 40 ms 40 ms
ANSWER
150ms 80 ms 40 ms 20 ms
OVERALL
3 4 0 ms 200 ms 120 ms 80 ms
POLLING TIME FOR 100 BURNERS
4800 9600 19200 38400
COMMAND
1,5 s 800 ms 400 ms 200 ms
QBK PROCESS
0,4 s 400 ms 400 ms 400 ms
ANSWER
1,5 s 800 ms 400 ms 200 ms
OVERALL
3,4 s 2000 ms 1200 ms 800 ms
Messages to/from remote host supervisor must be ASCII
characters, 8 bits, no parity, 1 or 2 stop bits.
COMMAND FROM SUPERVISOR TO PERIPHERALS
Commands issued to peripherals within a single string
terminated with Carriage Return.
< S N C KK <Cr> < Preamble (from master)
S Segment, Zone identifier
N Node, Unit identifier
C Command
KK Checksum
<Cr> Carriage return
STATUS FROM PERIPHERALS TO SUPERVISOR
Peripherals will acknowledge all valid command received
from supervisor:
> S N T KK <Cr> > Preamble (to master)
S Segment, Zone identifier
N Node, Unit identifier
T Status
KK Checksum
<Cr> Carriage return
S and N can be any alphanumeric character and must match the settings of the peripheral to be addressed.
The special character * (star) can be used like wild card to send broadcast command: a star character instead of S will
address all existing nodes, a star character instead of N will address the whole segment, two star characters will
address all the connected units. No acknowledge answer sent back after broadcast commands.