Campbell CS230, Руководство по техническому обслуживанию и инструкция

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CS230 Temperature Profiler
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7.3 Changing the SDI-12 Address Using
LoggerNet
and a
Datalogger
It is possible to connect multiple CS230 or other SDI-12 sensors to a single
datalogger control port. Each temperature sensor in the CS230, or output from
another SDI-12 device must have a unique SDI-12 address (see TABLE 7-4 ,
SDI-12 Addresses and Positions
(p. 10)
).
The factory-set SDI-12 addresses for the CS230 start at 1 and continue until the
last temperature sensor. The CS230 SDI-12 address is changed in software by
issuing the aAb! command to the CS230 over the SDI-12 interface, where a is
the current address and b is the new address. The current addresses of the
individual sensors can be found by issuing the a! command.
Campbell Scientific dataloggers (with the exception of the CR5000) support a
method of directly interacting with SDI-12 sensors via a terminal emulator.
This allows you to get confirmation that the change of address has worked,
using the a! command. This can be done using a computer running LoggerNet
to issue any valid SDI-12 command through the datalogger to the CS230 as
described in the following sections.
7.3.1 CR1000 and CR800 Series Dataloggers
1. Connect the CS230 to the datalogger using Control Port C1 or C3 as
described in Section 7.1 , Wiring
(p. 6)
. Be sure the datalogger is not running
a program that contains the SDI12Recorder() instruction on the port used.
2. Assuming that the datalogger is configured in Setup and able to
communicate via LoggerNet , navigate to the Connect screen. Select
Terminal Emulator under the Datalogger menu. The Terminal
Emulator window will open. In the Select Device menu, located in the
lower left-hand side of the window, select the station.
3. Click on the
Open Terminal
button.
4. Press the <enter> key until the datalogger responds with the CR800
prompt. Type SDI12 and select the appropriate port.
5. If the CS230 temperature sensor addresses are unknown, then conduct a
query for each sensor’s current SDI-12 address with the aI! command. If
no characters are typed within 12 seconds, then the mode is exited. Once a
complete list of addresses is gathered, you will know what block of
addresses are required to readdress the CS230. You will also be able to
request the related metadata so that sensor locations are confirmed. Be
sure to reference TABLE 7-4 , SDI-12 Addresses and Positions
(p. 10)
, for a
list of appropriate addresses.