Functions
5.3 Shared device
PROFINET with STEP 7
Function Manual, 05/2021, A5E03444486-AL
167
5.3.4
Module-internal shared input/shared output (MSI/MSO)
Introduction
This section describes the module-internal shared input/shared output (MSI/MSO)
functionality for I/O modules that are operated on PROFINET.
Module-internal shared input/shared output functionality
The module-internal shared input (MSI) function allows an input module to make its input
data available to up to four IO controllers. Each controller has read access to the same
channels.
The following figure shows the MSI functionality.
①
CPU 1516-3 PN/DP as IO controller
②
CPU 1511-1 PN as IO controller
③
Input module with MSI
④
Read access to the input channels of the input module
⑤
Write access to the channels of the I/O module (only with MSO)
Figure 5-31 Example configuration with MSI
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