Siemens S7-1200 - Information required for configuration

6 LCCF_EnetScanner block
EtherNet/IP Scanner
Entry-ID: 109782314, V1.1.0, 04/2021
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SIMATIC S7-1500
The average load shown in the below table are based on measurements taken on
a CPU 1512C used throughout the application example loaded with the two
adapters.
Table 6-5: Execution times for LCCF_EnetScanner
adapters
min. load
average load
max. load
ET200SP MF
0,6 ms
1,5 ms
3,2 ms
ET200SP MF
S7-1200
1 ms
2 ms
5 ms
The measured load is based on a 10ms cyclic interrupt and the data exchange
configured in the application example.
Table 6-6: configured data exchange sizes
Adapter
Outputs
Inputs
Configuration
ET200SP MF
20 Bytes @50ms
20 Bytes @50ms
None
S7-1200
64 Bytes @25ms
64 Bytes @25ms
64 Bytes @5s
Besides program execution time memory consumption should be taken into
consideration, when selecting the CPU model for a specific automation task. The
LCCF_EnetScanner block contributes to the memory loading a certain amount of
memory plus the data required per configured adapter. The following tables will
provide the detailed information.
Table 6-7: Memory consumption S7-1500
Block
Load Memory
Work Memory
LCCF_EnetScanner
459.055 Bytes
23.426 Bytes
instance DB
36.475 Bytes
25.132 Bytes
Memory is also consumed for each adapter configured and data areas to be
provided for it.
Table 6-8: Memory consumption for EtherNet/IP IO system
Adapter
Load Memory
Work Memory
1
4.453 Bytes
1.348 Bytes
2
5.635 Bytes
2.532 Bytes
3
6.816 Bytes
3.708 Bytes
NOTE
With the SIMATIC S7-1500 up to 16 EtherNet/IP adapters can be controlled.
This limitation is a compromise between many factors such as update rates,
CPU load, memory consumption and others.
If a specific application requires more the S7-1500 allows for more OUC
connection resources, which can be used.