31
h. RS485: Address selection, setting & reading
(for more details and examples refer to section D.5; except
‘
N
x
<c/r>
’, these commands are available also in the fill mode):
:
x
<c/r>
Activate the board addressed
x
.
x
is between 1 and 64.
Notes
1. Wait 10 ms after sending the colon (‘:’) before
sending the rest of the command (‘
x
<c/r>’).
2. Wait 30 ms after sending the ‘:
x
<c/r>’ command
before analyzing the response(s).
:
999
<c/r>
“Hello” command: prompt all existing boards to respond.
Notes
1. Wait 10 ms after sending the colon (‘:’) before
sending the rest of the command (‘999<c/r>’).
2. Wait 1000 ms after sending the ‘:999<c/r>’
command before analyzing the response(s).
n
Read the RS485 address of the active board.
Board’s response:
’#
x
<c/r>’, where
x
is the address of the active board.
x
=0 means that the board has been configured as a non-
RS485 device. Other value (between 1 & 64) specifies the
RS485 address of the active board.
Notes
1. Wait 1 second after sending the ‘n’ command.
2. If no board is active, there will be no response.
3. In case of malfunction, more than one ’#
x
<c/r>’ will
be responded in sequence. This is theoretically
impossible but should be checked in order to be on
the safe side.
N
x
<c/r>
Set the required RS485 address.
x
is between 0 and 64.
Board’s response: ‘OK<c/r>’.
(
x
=0 sets the board as a non-RS485 device; this will
facilitate your coding, as no ‘
:
x
<c/r>’ command will be
needed.)
Notes
1.
The address setting takes effect only upon board
reset.
2. When the RS485 address is not 0, its value is shown
for a while on the LED display upon board reset.
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