KROHNE MFC 400 Profibus - Manual (Page 10)

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PROFIBUS DP
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MFC 400
www.krohne.com 06/2013 - 4002835301 - AD MFC 400 PROFIBUS R01 en
2.7 Ident. Number selector
Within a PROFIBUS network the type of a PROFIBUS slave is identified by its Ident. Number
which is unique for this slave type. The PROFIBUS DP device supports two different Ident.
Numbers. Therefore it can be installed for different use cases. When the Ident. Number is
changed the behaviour of the device concerning the cyclic data transfer is changed; i.e. the
maximum number of transferred measuring values and/or the length and content of the
diagnosis information will be different. The user can select the required Ident. Number by an
engineering tool (e.g. DD/DTM - parameter IDENT_NUMBER_SELECTOR slot 0; index 40) or via
the MFC 400 device display menu (menu item "Identification No.", C6.8.7).
The following settings are supported:
• Automatic adaptation mode (factory setting)
• Manufacturer specific Ident. Number (4512 hex)
• Profile specific Ident. Number (9742 hex)
Automatic adaptation mode (factory setting)
If the parameter IDENT_NUMBER_SELECTOR is set to this mode the device will select its
operation mode during start-up of the cyclic data transfer according to the used GSD file. The
active Ident. Number is set to one of the settings described below. If the
IDENT_NUMBER_SELECTOR is changed to this mode the current Ident. Number is not changed
until the cyclic data transfer is (re-)started.
INFORMATION!
Depending on the components in the PROFIBUS network the automatic adaptation might fail. In
this case the active Ident. Number has to be selected by the user via an engineering tool or via
the device display menu. The parameter IDENT_NUMBER_SELECTOR has to be set to a fixed
Ident. Number.