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S5-95F
13.4.5 Transmission of Error Messages to the SINEC L1 Master
The S5-95F can automatically transmit system messages to the SINEC L1 master of channel B.
This enables you to evaluate, display and print out all messages from a central point.
If the appropriate parameters are entered in DB1 (see COM 95F manual), the S5-95F will send
every message entered in the error stack of DB254 to the SINEC L1 master of channel B.
Nonfailsafe frames to the SINEC L1 master have a fixed length of 16 net data bytes. The SINEC L1
master can identify frames as system messages from the source slave number and the frame
length.
Avoid sending user frames with a length of 16 net data bytes to the SINEC L1 master because it will
interpret them as system messages.
13.4.6 Example: SINEC L1 Cycle Time and SINEC L1 Safety Time
The following section demonstrates the relationship between the SINEC L1 cycle time and the
SINEC L1 safety times for Send and Receive.
Description:
In the example a master and three slaves are connected to the SINEC L1 LAN. Slave 1 and Slave 3
are S5-95F devices and slave 2 is an S5-115F programmable controller with CPU 942-7UF15.
Data traffic over the double SINEC L1 bus is arranged so that slave 1 can both send and receive via
data paths 1 and 2 to slaves 2 and 3. Nonfailsafe data traffic between the two masters and all three
slaves is also required.
Figure 13-11 shows the structure of the SINEC L1 network.
Nodes
Master 0
Slave 1 (S5-95F)
Slave 2 (CPU 942-7UF15)
Slave 3 (S5-95F)
EWA 4NEB 812 6210-02
Master traffic
20 bytes each
Figure 13-11. Network Structure
S5-95F on SINEC L1
Connections
95F mode
10 net bytes
+ 4 byte
header each
115F-15 mode
30 net bytes
+ 4 byte
header each
13-31
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