S5-90U/S5-95U
Communication via SINEC L1 LAN
14.5
Receiving Data
The prerequisites for receiving data are as follows:
The parameters for the location of the Receive Mailbox and the Coordination Byte Receive (KBE)
have been set in DB1 (see Section 14.3).
Receive Mailbox
Figure 14-7 shows you which information has to be stored in what part of the Receive Mailbox.
Figure 14-7. Structure of the Receive Mailbox
DW 32
FY
65
FY
0
FY
1
FY
2
DW 0
DW 1
DW 2
DL
DR
4th data byte
Length of the”net
data”
Source slave
number
*
4th data byte
1st data byte
3rd data byte
Example:
Receive Mailbox in the flag area
(beginning with flag byte 0)
Example:
Receive Mailbox in a data block
(beginning with data word 0)
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
* Number of the sender;
0=Master
1 to 30=Slave
63rd data byte
64th data byte
Length of "net data" (in
bytes (1 to 64 bytes))
Source slave number
*
1st data byte
64th data byte
EWA 4NEB 812 6115-02b
14-7
Содержание SIMATIC S5-90U
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