2018-04
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HART Multiplexer System KFD*-HM*-16
Configuration
Communication with the Field Devices
In this case, the communication between the HART multiplexer system and the field devices
(HART communication 2) is described.
The Communication to field devices (as HART master) section displays the following
information. This information can be changed and saved by the user.
• Master type: 2 HART masters may be connected to a HART signal loop, whereby
the parameterization must differentiate between the primary master and the
secondary master. The setting at this point indicates whether the multiplexer master
addresses the field devices as primary or secondary HART master.
• Retries on "Busy": Number of repeat attempts to establish communication
with the field device if the field device reports Busy.
• Retries on error: Number of repeat attempts to establish communication
with the field device if a fault occurs.
• Loop scan address range: This defines the address range in which the field devices on
the individual signal loops are searched for, see chapter 6.7.4:
• Scan address 0 only: The multiplexer master uses only address 0 to search for
connected devices.
• Scan addresses 0 to 15: The multiplexer master searches for all
polling addresses between 0 and 15 and identifies the first device to respond.
Figure 6.9 Communication window
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