Gsd Files; Ident. Number - turck IO-LINK MASTER User Manual

PROFIBUS-DP
Table 5: Protective mecha-
Protective
nisms
mechanisms
Of the
DP master
Of the
DP slave

Ident. number

Each DP slave and each DPM1 must have an individual ident. number. It is needed so that
the DP master can identify the connected devices directly without creating significant
protocol overhead. The master compares the ident. numbers of the connected DP devices
with the ident. numbers registered in the configuration data of the DPM2. User data transfer
will only be started, if the right device types with the right station addresses are connected to
the bus. This provides additional protection against configuration errors. The manufacturer
specific ident. nos. are determined and assigned by the PROFIBUS user organization (PNO).
The PNO governs the ident. nos. together with the GSD files.

GSD files

Each PROFIBUS-DP module has a so-called GSD file (German abbr. for device data base file)
that comprises detailed information on the module: I/O data volume, transmission rates, revi-
sion status etc. This GSD file is needed to configure the station within the PROFIBUS-DP
system.
The GSD files can be downloaded via the TURCK website under www.turck.com.
1-8
Description
The DPM1 controls the user data transfer of the slaves via the
Data_Control_Timer. Each assigned slaves has a monitoring timer of
its own. The timer actuates if no user data are transferred correctly
during a certain time interval. In this case the user is informed on this
condition. If automatic error response (Auto_Clear = True) is enabled,
the DPM1 terminates the "Operate" status, switches the outputs of
the assigned slaves into the safe status and returns to the operating
status "Clear".
The slave carries out response monitoring to detect master or trans-
mission errors. If there is no data exchange during the response moni-
toring interval with the associated master, the slave automatically
switches the outputs into the safe status. In multi-master system
operation, an additional access protection is required for the inputs
and outputs of the slaves, in order to ensure that only the authorized
master has direct access. The slaves provide an input and output
image for all other masters so that this map can be read by any
master, even without access token.
D301171 - IO-Link master 1108