EDDL (Electronic Device Description Language)
The device descriptions had to be standardized to enable smart field devices from various
manufacturers to be integrated into different control systems. This standard (IEC 61804-2) was
developed in cooperation with the following organizations:
● PROFIBUS User Organization (PNO)
● Hart Communication Foundation (HCF)
● Fieldbus FOUNDATION (FF)
● OPC Foundation
The basis for the device descriptions is the EDDL (Electronic Device Description Language -
Standard IEC 61804-3).
Edge selection
For the "Counter" mode, specifies the edge direction of pulses to be counted at the counting
input.
Requirement: The "Counter" mode is enabled.
Modes:
● On rising edge
● On falling edge
● On rising and falling edge
Enable channel
Enable/disable (for one DIQ channel or all DIQ channels)
Equipotential bonding
Electrical connection (potential equalization conductor) that brings the bodies of electrical
equipment and other conductive bodies to the same or almost the same potential, in order to
prevent disruptive or dangerous voltages between these bodies.
Fiber-optic cable
Possibility for transferring data across large distances. A major advantage of fiber-optic cables
compared to electrical lines is that the data transfer cannot be influenced by electrical or
magnetic fields.
The optical interfaces are specified in the following standards:
● ISO/IEC 9314-3 (multimode)
● ISO/IEC 9314-4 (single-mode)
Glossary
SIMATIC CFU
Commissioning Manual, 08/2019, A5E39252870-AD 207
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