Failsafe Data Interchange Over Sinec L1 - Siemens SIMATIC S5-95F Manual

S5-95F on SINEC L1

13.3 Failsafe Data Interchange Over SINEC L1

Failsafe data interchange is possible with SINEC L1 S5-95F and S5-115F slave nodes.
Failsafe data interchange is only possible when both sender and receiver are operating in the same
message mode. Systems with basic units 095-8FA02 support the two message modes of the S5-
115F in addition to the standard mode for the S5-95F
The following table shows the features of the three message modes.
Table 13-3. Overview of Message Modes for the S5-95F
Message mode
95F
115F-14
115F-15
13-10
Features
High-level protection of the
destination slave No.
Change byte for detection of new
frame
Depassivation of data paths
Useful frame monitoring
Nonfailsafe handshake
High-level protection of the
destination slave No.
No change byte for detection of new
frame
Automatic depassivation of data paths
No useful frame monitoring
No handshake
High-level protection of the
destination slave No.
Change byte for detection of new
frame
Automatic depassivation of data paths
No useful frame monitoring
No handshake
Typical applications
Standard mode for
communication with S5-95F
devices
Communication with devices of
the S5-11F with CPU 942-7UF14
(without gateways)
Communication with devices of
the S5-115F with CPU 942-7UF15
and/or
connection of the S5-95F to a
different LAN system via a
gateway
Transmission of failsafe
broadcast frames
EWA 4NEB 812 6210-02
S5-95F