Siemens SIMOCODE pro C System Manual page 383

Function block
Defined group of functions that can be freely parameterized by the user and connected to
other function blocks to create a complete feeder-specific logic system. This means
conventional wired control circuits containing auxiliary relays, time relays, etc. can be
completely replaced.
Function code (FC)
Identification of a function
Ground-fault module (EM, EM+)
The ground-fault module and the multifunction module enable implementation of a powerful
external ground fault monitoring system in conjunction with the 3UL22 (3UF7 500-1AA00-0)
and 3UL23 (3UF7 510-1AA00-0) residual current transformers. In addition to the internal
ground-fault monitoring function which is supported by both device series, SIMOCODE pro
can be extended by an additional and more precise external ground-fault monitoring system.
Ground-fault monitoring
SIMOCODE pro acquires and monitors all three phase currents. By evaluating the
summation current of the three current values, the motor feeder can be monitored for a
possible residual current or ground fault. There is a difference between internal and external
ground-fault monitoring:
Internal ground-fault monitoring:
Internal ground-fault monitoring via current measuring modules or current/voltage measuring
modules is only possible for motors with a 3-phase connection in power systems that are
either grounded solidly or with low impedance. The basic unit uses the total current to detect
a possible residual current / ground-fault current.
External ground-fault monitoring:
The external ground-fault monitoring using residual current transformer and ground-fault
module is normally used for power systems that are grounded with high impedance, or in
cases, in which precise detection of the ground-fault current is necessary, for example, for
condition monitoring. The ground-fault module (EM) or the multifunction module (MM)
evaluates rated fault currents using an externally connected summation current transformer
(e.g. 3UL23).
GSD file
The properties of a PROFINET device are described in a GSD (General Station Description)
file that contains all the necessary information for configuration. You can use a GSD file to
integrate a PROFINET device in exactly the same way as a PROFIBUS device into an
automation system (SIMATIC S7 environment or any DP standard master system).
In the case of PROFINET IO, the GSD file is in XML format. The structure of the GSD file
conforms to ISO 15734, the worldwide standard for device descriptions.
SIMOCODE pro
System Manual, 05/2019, A5E40507475002A/RS-AD/004
Glossary
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