HART Multiplexer System KFD*-HM*-16
Configuration
DO
C
T-0
120D
06/
2014
32
Setting the parameters
In the project window, use the mouse to double-click on the Communications DTM
HART Communication
.
The
Parameter
window is indicated.
Use the
OK
button to close the
Parameter
window.
The following parameters are adjustable:
•
Communication interface
: Select the option
HART Multiplexer
as
communications means.
•
Set as
Port
the interface, to which the HART Multiplexer has been connected.
•
Select the
Baudrate
according to the settings of the DIP switches on the HART
Multiplexer.
•
RTS Control
: Depending on the RS 232/RS 485 converter used, it may be
necessary to switch on or off the request-to-send control in order to be able to
switch over correctly between reception and transmitting mode.
•
Master
: Masters may be connected to one HART loop whereby the Masters have
to be differentiated as primary and secondary Master by the parameterization.
This setting is carried out here.
•
Preamble
: In keeping with the HART standard, a corresponding number of
FF characters
have to be sent in advance as preamble. The number of
characters is defined here.
•
Number of communication retries
: The number of repeats of contact attempts
in case of an error.
•
Address Scan – Start and End address
: Here the address range is set, in which
the HART Communication DTM is to search for the HART Multiplexers connected
to the RS 485 bus.
Figure 6.3 HART Communication Parameter window
