Performance data
2.6 Characteristic data for PROFINET CBA
CP 443-1 Advanced (GX30)
Manual, 03/2019, C79000-G8976-C256-05
33
Comparing CPU and CP 4431 Advanced
In the documentation of the CPU 3172 PN/DP, for example, you can see the influence as
shown in the following graphic. Measurement series 1 and 2 show this influence when the
CPU interface is used for PROFINET CBA.
In an additional measurement series, the graphic shows the influence when you use the
PROFINET CBA interface of a CP 443-1 Advanced (here: 6GK7 443-1EX40) in an S7-400
station.
It can be seen that in contrast to operation over a CPU network attachment, the OB1 cycle
remains practically uninfluenced by the CBA communication if PROFINET CBA is operated
over a CP 4431 Advanced.
Legend:
1)
OB1 cycle with 32 PROFINET
CBA partners and network attachment on the CPU 317−2
PN/DP.
2)
OB1 cycle with 5 PROFINET
CBA partners and network attachment on the CPU 317−2
PN/DP.
3)
OB1 cycle with an S7400 sta
tion with CPU 416−2 and with network attachment on the CP
443−1 Advanced (the number of PROFINET
CBA partners has no influence).
Figure 2-1
Cycle times with PROFINET CBA interconnections
2.6.3
Reaction times
Definition
The reaction time is the time from recognizing an input signal until the associated output
signal changes.
