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S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
11-13
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With CPU 31x-2 you assign diagnostic addresses for the PROFIBUS DP. Make
sure DP diagnostic addresses are assigned once to the DP master and to the DP
slave during configuration.
CPU as DP master
CPU as DP slave
During configuration you must specify three diagnostic addresses:
PROFIBUS DP
DP interface diagnostic address
(from the slave)
• Slave diagnostic address
(from the master)
• Slot 2 Diagnostic Address
of the Slave (from the master)
Figure 11-3 Diagnostic addresses for DP masters and DP slaves
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When configuring the DP master, define a
diagnostic address for the DP slave (in the
associated project of the DP master).
Below, this diagnostic address is labeled
$VVLJQHGWR'3PDVWHU.
The DP master receives information about
the status of the DP slave or about a bus
interruption by means of this diagnostic
address.
During configuration of the DP slave, you
also specify a diagnostic address assigned
to the DP slave (in the associated project of
the DP slave).
Below, this diagnostic address is labeled
$VVLJQHGWR'3VODYH.
This diagnostic addresses is used by the DP
slave to obtain information on the status of
the DP master or a bus interruption.
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When CPU318-2 DP act as a master in DPV1 mode, you assign two different
diagnostic addresses for an I-Slave, one diagnostic address for Slot 0 and one for
Slot 2. Both addresses have the following functions:
• The diagnostic address for slot 0 reports in the master all events relating to the
complete slave (node representative), e.g. node failure.
• The diagnostic address for slot 2 is used to report events that affect this slot.
For example, if the CPU is acting as an intelligent slave, it returns the diagnostic
interrupts for operating state transitions.
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