S5-115F Manual
Communications Capabilities
Explanation of Table 7-10
The SINEC L1 LAN is operated with a single channel.
The slave No. is 1 to 4 in the S5-115F programmable controllers.
Our example contains 10 different send data paths from slave to slave and from slave to
master. One element must be entered in the SINEC L1 polling list for each send data path.
The polling list could, for example, be: 1-2-3-1-4-2-1-2-1-4.
The process demands that an error in the signals transmitted over the SINEC L1 LAN must
be detected within 1.5 seconds (the maximum SINEC L1 safety time is 1.5 s).
The total volume of information transmitted in our example is 346 bytes, which gives a
maximum polling time of 1140 ms for slave-to-slave data paths.
The 1.5 s safety time allowed for by the process for the relevant data is viable: the safety
time is greater than the SINEC L1 polling time.
In our example, the coordination bytes should be situated in the flag area, flags 2 and 3.
There are six slave-to-slave and four slave-to-master data paths. This means that 10 Send
mailboxes must be defined. For example, the following applies to slave 1:
•
1 to 0
•
1 to 2
•
1 to 3
•
1 to 4.
The following must be specified:
•
Mailbox length in bytes (40,30,30,30),
•
Mailbox location (DB for all four Send mailboxes),
•
DB No. (100 for all four Send mailboxes).
•
Initial data word No. (0,20,35,50).
In our example there are six slave-to-slave data paths and one master-to-slave data path.
This means that seven Receive mailboxes must be defined. For example, four of the
mailboxes are allocated to Slave 1:
•
0 to 1
•
2 to 1
•
3 to 1
•
4 to 1
The following must be specified:
•
Mailbox length in bytes (20,50,50,50)
•
Mailbox location (DB for all four Receive mailboxes)
•
DB No. (101 for all four Receive mailboxes)
•
Initial data word No. (0,10,35,60).
Note
If you use the function for sending error messages to the SINEC L1 master, you must
allow for this send data path and the amount of data required (56 bytes) when
calculating the SINEC L1 polling time.
EWA 4NEB 811 6148-02
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