Device-Related Parameters
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Device-Related Parameters
This section describes the device-related parameters for device identification and device
documentation.
7.1
Device Identification
PROFIBUS Ident Number
A PROFIBUS ident number is assigned to each field device type of each manufacturer for
unambiguous identification throughout the PROFIBUS network. This ident number links the
device to a specific GSD file that contains a full description of the field device type of the
manufacturer. When starting the cyclic communication, the ident number is used to verify
whether the devices that are addressed in the bus match the devices that are projected in the
GSD file. If not, an error is issued.
This way, devices of different manufacturers with the same function cannot be replaced with
each other. In order to enable easy interchangeability (e. g., in case of repair or substitution),
devices corresponding to the PROFIBUS PA profile are divided into device classes. Devices in
these classes are assigned a profile-specific ident number.
For information on the PROFIBUS ident number, see chapter 3.3.
For information on the PROFIBUS ident number setting in the device type manager, see
chapter 10.3/see chapter 10.4.
Other Device Identification Parameters
In order to identify a specific installed device, several read-only parameters are available.
Examples among others are:
■
Device ID
■
Device serial number
■
Software revision
■
Hardware revision
For more information on these parameters in the device type manager, see chapter 10.3.1/see
chapter 10.4.1.
7.2
Device Documentation
Device Documentation Parameters
Several parameters enable you to store information related to the specific use in the device
itself.
Examples among others are:
■
Installation date
■
Tag description
■
Strategy
For more information on these parameters in the device type manager, see chapter 10.3.1/see
chapter 10.4.1.
