Siemens 6MD86 - Function Control

Function Control
Function control is used for:
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Functions that do not contain stages or function blocks
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Stages within functions
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Function blocks within functions
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NOTE
Simplifying functions and function control will be discussed in the following. The description also applies
to tripping stage control and function block control.
Functions can be switched to different operating modes. You use the parameter Mode to define whether you
want a function to run (On) or not (Off). In addition, you can temporarily block a function or switch it into test
mode for the purpose of commissioning (parameter Mode = Test).
The function shows the current status – such as an Alarm – via the Health signal.
The following explains the different operating modes and mechanisms and how you set the functions into
these modes. The function control is shown in Figure 2-3. It is standardized for all functions. Therefore, this
control is not discussed further in the individual function descriptions.
[losteurg-040411-01.tif, 1, en_US]
Figure 2-3 General Control of a Function
State Control
You can control the state of a function via the parameter Mode and the input Superordinate state.
You set the specified operating state of the function via the parameter Mode. The function mode can be set to
On, Off, and Test. The operating principle is described in Table 2-2. You can set the parameter Mode via:
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DIGSI 5
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On-site operation at the device
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Certain systems control protocols (IEC 61850, IEC 60870-5-103)
The possibility to adjust the superordinate state is limited. For test purposes, the complete device can set into
test mode.
2.3
Basic Structure of the Function
2.3 Function Control
40 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017