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S5-95F
Characteristics of Failsafe Data Interchange over SINEC L1
Table 13-4. Characteristics of Failsafe Data Interchange
Characteristics of Failsafe Data Interchange
Number of slaves to which the S5-95F can transmit:
Number of slaves from which the S5-95F can receive:
Permissible frame length (net data)
Reaction-free connection:
Failsafe frames possible:
Broadcast frames possible:
Interrupt frames possible:
Cable-redundant, high-availability SINEC L1 bus capability:
For security reasons, the S5-95F only allows either the transmission of failsafe broadcast frames or
node-to-node transmission of failsafe frames via SINEC L1. These options are mutually interlocked
by COM 95F.
Conditions for Failsafe Input/Output Signals
Safety Note
If failsafe input and output signals are to be transmitted over the SINEC L1 network, a
"0" signal must always lead to a safe system state ( closed-circuit principle ). This is
absolutely necessary, as the S5-95F erases the contents of the Receive Mailboxes in
the event of a data transfer error.
Inputs are in a safe state when the transmitted "0" signal brings the process to the safe quiescent
state. The input for an EMERGENCY STOP, for instance, must have a "1" signal during operation
and be activated by a "0" signal.
Outputs are in a safe state when the transmitted "0" signal resets the output and brings the
actuator connected to it to a safe state.
Special Features of Failsafe Data Interchange over SINEC L1
Note
It is not necessary to transmit and receive at least one useful frame within the SINEC L1
safety time. If necessary, the operating system sends test frames, unbeknownst to the
user, in order to monitor the bus.
EWA 4NEB 812 6210-02
S5-95F on SINEC L1
2 (data paths 1 and 2)
2 (data paths 1 and 2)
Max. 60 bytes
Yes
Yes
Yes, in 115F-15 mode
No
Yes
13-11
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