Field Communications Protocol
HART is a widely used communication standard for field devices. The HART-Standard expands the analog 4- bis 20-mA signal into a modulated, industry-standard digital HART signal.
The advantage is the combination of field-tested analog measured-value transmission and simultaneous digital communication with bi-directional, acyclic transmission, making it possible to transfer diagnostic, maintenance and process information from field devices to higher-level systems. Standardized sets of parameters can be used for cross-vendor operation of all HART devices.
HART Device Descriptions(EED) are used to integrate HART devices in SIMATIC PDM ensuring easy operation and commissioning of field devices even in hard-to-reach locations..