Commissioning
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
8-25
DP address areas of the CPUs
Table 8-7 DP address areas of the CPUs
Address area 315-2 DP
313C-2 DP
314C-2 DP
316-2 DP 318-2 DP
DP address area
for I/Os
1024 bytes 2048 bytes 8192 bytes
Number of those in the I/O
process image
Bytes 0 to 127 Bytes 0 to 127 Byte 0 to 255 (default),
configurable up to
byte 2047
DP diagnostic addresses occupy 1 byte per DP master and DP slave in the input
address area. For example, at these addresses DP standard diagnostics can be
called for the respective node ( LADDR parameter of SFC13). The DP diagnostic
addresses are specified in your configuration. If you do not specify any DP
diagnostic addresses, 7 STEP 7 assigns these DP diagnostic addresses, starting
at the highest byte address downwards .
With CPU 31xC-2DP as master/ CPUx>=3 as master with DPV1 configuration you
assign two different diagnostic addresses to S7 slaves:
• Diagnostic address of the slave (address for slot 0)
At this address all slave events are reported in the DP master (station
representative), e.g. station failure.
• Diagnostic address of the module (address for slot 2)
At this address all module (e.g. CPU 313C-2 DP as I-Slave) events are reported
in the master (OB82). With a CPU as DP-Slave, for example, diagnostic
interrupts for operating mode transitions are reported at this address.
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