User’s Guide ______________________________________________________________________
188 _________________________________________________________________ M211840EN-C
Communication Protocol
Set the communication protocol SDI-12 v 1.3 (aXU,C=1,M=S) or SDI-
12 v1.3 continuous (aXU,C=1,M=R).
Assign the transmitters on the bus with different addresses (for
example: aXU,A=0,1,2, ... ). After that, the transmitters on the bus do
not respond to the commands not assigned to them nor to the data
messages sent by the other transmitters.
Example (A bus with three WXT530 Series transmitters):
WXT530 #1 communication settings:
0XXU,A=0,M=S,C=1,B=1200,D=7,P=E,S=1, L=25
WXT530 #2 communication settings:
1XXU,A=1,M=S,C=1,B=1200,D=7,P=E,S=1, L=25
WXT530 #3 communication settings:
2XXU,A=2,M=S,C=1,B=1200,D=7,P=E,S=1, L=25
If simultaneous measurements of the different units are needed, Start
concurrent measurement commands aC and aCC should be use for all
devices. If the measurements are to be performed consecutively for only
one unit at time, in addition to these also Start measurement commands
aM and aMC can be used. Start continuous measurement commands
aR1, aR2, aR3, aR5, aR, aRC1, aRC2, aRC3, aRC5 and aRC
available only in SDI-12 continuous protocol (aXU,M=R) can be used
either for simultaneous measurements of the units or consecutive
measurements for one unit at time. See also SDI-12 Protocol on page
100.
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