S5-95F on SINEC L1
S5-95F
13.3.4 Receiving Failsafe Data
The S5-95F can receive failsafe data from up to two slaves (two "Receive" data paths). The source
PLC must be either an S5-95F or an S5-115F. Up to 60 net data bytes may be transferred each
time.
Each data path has a fixed Receive Mailbox; the Receive Mailboxes are in
•
DB 252, beginning data word DW 1, for data path 1
•
DB 253, beginning data word DW 0, for data path 2.
Before data can be received, you must have
•
initialized parameter blocks SL1: and SL1S: in DB1.
The diagram below shows which information is stored where in the Receive Mailbox.
Contents of the SINEC L1 DBs (DB252 and DB253)
Data word
Contents of the data word
DW 0
DW 1
DW 2
.
.
.
DW 30
No. of net data bytes
Net data byte 1
Net data byte 3
Net data byte 59
Receive condition code and control
byte
Net data byte 2
Net data byte 4
Net data byte 60
DW 32
DW 33
DW 34
.
.
.
DW 62
No. of net data bytes
Net data byte 1
Net data byte 3
Net data byte 59
Send condition code byte
Net data byte 2
Net data byte 4
Net data byte 60
DL
Send Mailbox
DR
DL
Receive Mailbox
DR
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13-20
EWA 4NEB 812 6210-02