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S5-95F on SINEC L1
13.3.3 Sending Failsafe Data
An S5-95F can send failsafe data to no more than two slaves (two "Send" paths). The destination
slaves must be either S5-95Fs or S5-115Fs. You can transfer up to 60 bytes of net data per
transmission.
Each data path has a fixed mailbox. These are
•
DB 252, beginning DW 32, for "Send data path 1"
•
DB 253, beginning DW 32, for "Send data path 2"
The following is prerequisite to sending data:
•
Parameter blocks SL1: and SL2S: must be available in DB1
•
You have transferred the net data and auxiliary information (number of net data bytes) to the
Send Mailbox
The diagram below shows you which information is stored where in the Send Mailbox.
Contents of the SINEC L1 DBs (DB 252 and DB 253)
Data word
Contents of the data word
DW 0
No. of net data bytes
DW 1
Net data byte 1
DW 2
Net data byte 3
.
.
.
DW 30
Net data byte 59
DW 32
No. of net data bytes
DW 33
Net data byte 1
DW 34
Net data byte 3
.
.
.
DW 62
Net data byte 59
13-18
DL
Receive Mailbox
DL
Send Mailbox
DR
Receive condition code and control
byte
Net data byte 2
Net data byte 4
Net data byte 60
DR
Send condition code
Net data byte 2
Net data byte 4
Net data byte 60
EWA 4NEB 812 6210-02
S5-95F
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