09.02 Start-Up
Siemens AG 6SE7087-6AK85-1AA0
4-43
Rectifier/Regenerating Unit Operating Instructions
4.3.9.7 Circuit identification (P052 = 21)
This function identifies the DC link and the supply and re-assigns certain control parameters.
Specific closed-loop control parameters are re-assigned in connection with this function.
Only the parameters of the reserve data sets currently
selected are modified (see "Data sets" in Section 4.1.2
and "Selecting the data sets" in Section 4.4).
NOTE
Circuit identification (i.e. automatic setting of the appropriate parameters) must be carried out, otherwise error
message F061 will be generated when the unit is switched on.
While circuit identification is being carried out, the constellation of supply, and reactor and autotransformer
arrangement as well as the capacitive load connected to the DC link terminals of the rectifier/regenerating unit
must be identical to the constellation for normal operation later. The main reason being that the Ud controller
gain that is set depends on the measured intermediate circuit capacitance.
If more than one inverter of the series SIMOVERT Master Drives 6SE70 are to be operated with the
rectifier/regenerating unit, whereby the number of inverters connected to the DC link at any one time varies, it
is recommended that reserve data set selection is implemented. Up to 4 different configurations can be
formed for this purpose that are each assigned to a reserve data set. Circuit identification has to be carried out
separately for each of these reserve data sets. During circuit identification, the appropriate configuration must
exist for the selected data set.
Circuit identification must be carried out whenever the supply network changes and/or whenever the number
of connected inverters changes.
The "Circuit identification" function can be aborted at any time with an OFF command. This triggers fault
message F091 "Circuit identification aborted by external cause".
During circuit identification, which is carried out in a series of separate stages, code numbers appear on the
PMU that indicate the current working stage.
If an error occurs during a stage, the circuit identification function is aborted. The exact cause of the abort is
indicated in the fault value r949 assigned to the fault number memory r947 (for a non-reset fault in index i001
and if reset in index i009).
You will find a detailed description of the fault messages, associated fault values and a description on the
warning messages in Chapter 7 "Faults and Warnings".
AoteWell Automation Sales Team
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