2018-04
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HART Multiplexer System KFD*-HM*-16
Configuration
Setting Parameters
1. In the project window, double-click the communication DTM. It bears the name of the
COM port on which the device is physically connected with the computer (e. g. COM8).
2. Close the Parameters window by clicking the OK button.
If you have made changes to parameters, these changes will be saved.
The following parameters are adjustable:
• Communication interface:
Select the option HART multiplexer as the interface.
• Serial interface:
Select the COM port to which the multiplexer master is connected.
• Baud rate:
Select the baud rate according to the settings of the DIP switches on
the multiplexer master, see chapter 5.2.2.
• RTS control:
Depending on the type of interface converter used, switching the request-to-send control
on or off may be necessary to switch cleanly between receive and transmit mode.
• HART protocol:
Master: 2 HART masters may be connected to a HART signal loop, whereby
the parameterization must differentiate between the primary master and the
secondary master. This setting is defined here.
Preamble: In accordance with the HART standard, a corresponding number of
FF characters must be sent in advance as a preamble. The number of characters is
defined here.
Number of communication retries: Number of repeated attempts to make contact in
the event of an fault.
• Address scan: start address and end address:
Here you can set the address range in which the HART communication DTM should
search for the multiplexer devices connected to the RS-485 interface.
• Communication timeout:
Here you can set how long the HART communication DTM should search for
the multiplexer devices connected to the RS-485 interface.
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