Note
Digital I/O Module (DIO), Inductive Limit Switches (ILS) and Mechanic Limit Switches (MLS)
Digital I/O Module (DIO)⑤, Inductive Limit Switches (ILS)⑥ and Mechanic Limit Switches
(MLS)⑦ can only be used alternatively.
3.4.2 Mode of operation of the HART function
Note
Priority of operation / failure of power supply
● Operation at the positioner has priority over specifications from the HART communicator.
● Failure of the auxiliary power to the positioner also interrupts communications.
Function
The positioner is also available with built-in HART functionality. The HART protocol allows you
to communicate with your device using a HART communicator, PC, or programming unit. You
can do the following with your device:
● Convenient configuration
● Store configurations
● Call up diagnostic data
● Show online measured values
Communication takes place as frequency modulation on the existing signal lines for the
setpoint of 4 to 20 mA.
The positioner is integrated into the following parameter assignment tools:
● HART communicator
● PDM (Process Device Manager)
● AMS (Asset Management System)
3.4.3 HART system configuration
Overview
The positioner can be used in a number of system configurations:
● Stand-alone, supplied with the required auxiliary power supply; communication with
supplementary units (handheld), for example
● As part of a complex system environment, e.g. SIMATIC S7
Description
3.4 Mode of operation
SIPART PS2 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E00074631-AE 33
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