Pepperl+Fuchs KFD Series - 7 Operation; Device Functions

2018-04
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HART Multiplexer System KFD*-HM*-16
Operation
7Operation
7.1 Device Functions
The software functions described in this chapter are usually integrated in the
operating software of the process control system, i. e., the software functions are generally not
enabled or disabled via the described HART commands. Instead, they exist in the functions
(menu commands) of the operating software that take on these processes. Nevertheless, the
underlying HART commands are described because the functions may have different names
in the individual user interfaces and the underlying basic functions may not always be apparent
from the name. For a list of the commands supported see chapter 9.1.
All Functions at a Glance
The following list shows all the functions of the multiplexer master at a glance:
• 16 channels, expandable up to 256 channels by connecting up to 15 multiplexer slaves
• Up to 7936 signal loops per RS-485 interface
• Automatic search of all existing HART-compatible field devices (scan)
• Switchable, independent, cyclical querying of the HART variables (command caching)
• Acts as the primary or secondary multiplexer master
• Fast RS-485 interface (multidrop) with up to 56700 baud
• Integrated modem
• Removable terminals
• Power supply via Power Rail
• Approved for Zone 2
Danger!
Explosion hazard from live wiring of circuits
If you connect or disconnect energized circuits in a potentially explosive atmosphere,
sparks can ignite the surrounding atmosphere.
Only connect or disconnect energized circuits in the absence of a potentially explosive
atmosphere.
Danger!
Explosion hazard from sparking when using operating elements
Using operating elements in a potentially explosive atmosphere can cause sparks that can
ignite the surrounding atmosphere.
Only use operating elements (e. g., switch, slider, button, etc.) in the absence of a potentially
explosive atmosphere.