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Siemens SINEC L2 User Manual

Siemens SINEC L2
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S5-95U, SINEC L2 Data Transmission Using a Standard Connection
4.3 Transmitting Data
There are two prerequisites for transmitting data:
• The parameters for the locations of SF and CBS are set in data block DB1 (see section 4.2).
• The transmit data, additional information (length of the transmit data (“net data”), and the
station address of the receiver) have been transferred to the send mailbox.
Figure 4-4 shows which information must be stored in which send mailbox location.
Example: Send mailbox in the flag area Example: Send mailbox in the data block
(starting with flag byte 0) (starting with data word DW0)
--
Figure 4-4. Structure of the Send Mailbox for a Standard Connection
DW 0
DW 1
DW 121FY 243
FY 0
FY 1
FY 2
DL DR
2nd data item
“Net data” length in bytes
(1 to 242)
*
Receiver’s address*
1st data item
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* 1 to 31 = L2 station address (active stations)
255 = Broadcasting (to all active and passive stations, see section 4.6)
“Net data” length
in bytes (1 to 242)
Receiver’s
address*
1st data item
241st data item 242nd data item242nd data item
EWA 4NEB 812 6112-02
4-5

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Siemens SINEC L2 Specifications

General IconGeneral
BrandSiemens
ModelSINEC L2
CategoryController
LanguageEnglish

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