Rules Governing the Use of the S5-115F
S5-115F Manual
10.19.3 FB 254 Synchronization for SINEC L1 LAN
Data traffic on the SINEC L1 LAN is also monitored for a configurable safety time. Within this
safety time, a data transfer must have taken place with all the communications partners
configured (except the master PLC), otherwise the Receive mailbox will be erased for security
reasons. If you use the SINEC L1 LAN, we recommend that you call FB 254 every 30 to 40 ms, if
possible.
10.19.4 Two-Channel SINEC L1 LAN
You must note the following if you operate the SINEC L1 LAN with two channels:
Before you access the Receive mailbox of the SINEC L1 channel B, you must call MBXT FB 253. This
FB checks whether the relevant data path is defective ( Vol. 2, 6.1.5 of the Manual). If the data
path is defective, the FB 253 transfers the Receive mailbox of the intact SINEC L1 channel A to the
defective SINEC L1 channel B.
10.20
Individual Acceptance Test of the Safety-Related System
The S5-115F is a component of your safety-related system and is inspected during the acceptance
test of the overall system.
A significant aspect for the test of the S5-115F is failsafe interaction with all safety-related
components, such as sensors and actuators.
This section contains information which will help you in preparing for the acceptance test of the
safety-related system.
It has been found useful in practice to divide the licensing procedure into three sections.
We therefore recommend division as follows:
•
Planning phase
•
Pre-inspection
•
System acceptance test
10.20.1 Planning Phase
You should clarify the following points with the licensing authority while you are planning your
system:
Definition of safety requirements
Specify the standard (e.g. DIN VDE 0116) which describes the safety requirements for your system,
and determine the quality level to DIN V 19250.
Perform risk analysis
In the risk analysis, you define which subprocesses of your system are safety-related. If safety-
related and non-safety-related subprocesses are juxtaposed you must also perform a risk analysis
for the non-safety-related subprocesses.
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