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Siemens SIMATIC S5-115F User Manual

Siemens SIMATIC S5-115F
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S5-115F Manual Communications Capabilities
7.2.2 Safety-Related Connection of Several S5-115Fs
Process automation systems consist of several PLCs if
The I/O capacity of one PLC is not sufficient
The user program is too long for one PLC
A distributed configuration is required (e.g. for availability reasons).
Message structure variants
The message protection mechanism has been extended in the CPU 942-7UF15. Safety-related
broadcast messages from the slave and nonsafety-related broadcast messages from the master are
now also possible.
You can, of course, still use the CPU with the "old" protection mechanism, because it also supports
the message modes of CPU 942-7UF11 ...14. You assign the parameters for the applicable message
mode with COM 115F. Please note the differences in the message and mailbox structures.
The following table gives an overview of the three message modes.
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Table 7-6. Overview of the Three Message Modes
Message mode Supported by Features Application
115F-13 mode CPU 942-7UF11 ...15 Data transmission
without protective
specification of the
destination slave
number
Only allowed if the
mailboxes of the
destination slaves are
all of different length
115F-14 mode CPU 942-7UF14 ...15 Data transmission with
protective
specification of the
destination slave
number
Communication with
S5-115F with CPU
942-7UF14 and S5-
95F
115F-15 mode CPU 942-7UF15 Data transmission with
protective
specification of the
destination slave
number and message
change monitoring
Standard application,
for communication
with CPU 942-7UF15
and S5-95F
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Important for configuring mailboxes:
Note
When configuring with COM 115F, remember that the length of the Send mailbox
must be the same as that of the relevant Receive mailbox.
EWA 4NEB 811 6148-02
7-13

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Siemens SIMATIC S5-115F Specifications

General IconGeneral
BrandSiemens
ModelSIMATIC S5-115F
CategoryController
LanguageEnglish

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