Installation
Marathon MM Rev. D7 Jul 2017 33
6.4.2 Addressing
The addressing of a sensor can be done by means of the Control Panel on the back of the sensor or the
DataTemp Multidrop Software (Menu <Sensor Setup>) that came with your sensor. An alternative
would be to use the specific interface commands of the sensor in conjunction with a standard terminal
program (e.g. Windows HyperTerminal), see section 10.12 Command List, page 78.
If you are installing two or more sensors in a multi-drop configuration, please be aware of the following:
Each sensor must have a unique address greater zero.
Each sensor must be set to the same baud rate.
6.4.3 Configuration Procedure
1. Attach each unit individually to the computer.
2. Start the DataTemp Multidrop Software.
3. In the DataTemp Multidrop Startup Wizard, select the correct COM port and ASCII protocol,
then <Scan All Baud Rates> for a <Single Sensor>. DataTemp Multidrop should find the single
MM unit connected to the computer serial port.
4. Once DataTemp Multidrop is running, go to the <Setup> menu and select <Sensor Setup>.
5. In the <Sensor Setup> menu select the <Advanced Setup> tab. This tab contains the
Communications Interface menu. The Interface Menu allows you to set the <Polling Address>,
<Baud Rate> and <RS485 Mode>. Each unit needs a unique address, but the same <Baud Rate>
and <RS485 Mode> settings.
6. Once all the units are addressed, wire up the units in the either the 2-wire or 4-wire multidrop
manner, keeping all TxA's, TxB's, RxA's and RxB's to be common.
7. Now you can run the DataTemp Multidrop Software and by selecting the baud rate that you
set, the program will quickly identify all of the units attached on the network and you're up and
running.
It is also possible to address each unit without the use of the DataTemp Multidrop Software. Once the
unit is powered up, use the enter and mode buttons on the back panel operator interface and toggle to
the Multidrop Address field, see section 7.2 Operation Modes, page 34. Use up and down buttons to
select a unique address for each unit. The units may now be installed in a multidrop network.
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