MRBP.425241.001 UM version 1.1 01.05.2022 FD 329/330-3-
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To change the exchange rate over the RS-485 channel it is necessary to write a code
corresponding to a certain exchange rate to the register with address 0x01, placing it in the
lower byte of the register (In the upper byte - the device address).
0xNN01 - 1200
0xNN02 - 2400
0xNN04 - 4800
0xNN08 - 9600
0xNN10 - 19200
One must bear in mind, that an attempt to change the dete
ctor’s number automatically
leads to a change in the exchange rate (and vice versa), therefore, when changing the
dete
ctor’s number, it is necessary to monitor the contents of the byte responsible for the
exchange rate (and vice versa).
When changing the rate and (or)
the detector’s number, the upper-level controller receives
a response to the command at the same speed, and only after that FD 329/330-3-
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changes the exchange rate and detectors number.
When debugging software, the cyclic use of the command with code 06 is unacceptable as
registers intended for writing have a limited number of write cycles (10000).
An attempt to write to registers with other addresses results in a response with an address
error code.
WARNING: it is not allowed to read and use information from addresses not specified in
this UM.
