Siemens ET 757 E Series Instrucciones de operaciones Pagina 182

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Glossary
ET 200pro FC
182 Operating Instructions, 11/2007, A5E01100763B AA
Load groups
A load group contains a frequency converter with a power supply and all the frequency
converters located to the right of it as far as the next frequency converter/motor starter with a
power supply.
All ET 200pro FCs sharing one incoming power bus supply are referred to as a "load group".
A load group can differ from a potential group. An additional incoming power bus supply may
be needed within a group of frequency converters supplied by the same power module, in
order to avoid exceeding the rated operational current (aggregate current) of the terminal
modules. The aggregate current of the power bus must not exceed 50 A.
Monitoring cycle
The safety-related monitoring functions for the drives are executed cyclically in ms.
Monitoring parameters
Parameters which can only be monitored are identified by the prefix "r".
These parameters are used to display internal variables, e.g., statuses or actual values.
Examples of notation:
r0002 Monitoring parameter 2
r0052.3 Monitoring parameter 52, bit 03
r0947[2] Monitoring parameter 947 index 2
r0964[0 ... 4] Monitoring parameter 964 with 5 indices (indices 0 to 4)
Parameter attributes
In the parameter list, the header for each parameter shows all attributes and groups
associated with it.
Index
The index is used to define a parameter (e.g., P0013[20]) with a number of following
elements (in this case, 20). Each individual index is defined using a numerical value. In
relation to a parameter, this means that one indexed parameter can exhibit a number of
values. The values are addressed using the parameter number and index value (e.g.
P0013[0], P0013[1], P0013[2], P0013[3], P0013[4]). Indexed parameters are used, for
example, for:
Drive data sets (DDS)
Command data sets (CDS)
Subfunctions
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