Siemens SINEC L2 User Manual

Data Transfer with PLC-to-PLC Connections S5-95U, SINEC L2
Principle of Operation
Figure 6-2. Functional Diagram of a PLC-to-PLC Connection
Active network stationActive network station
Source PLC
DB 60
yes
no
Receive viable?
Status byte/RECEIVE
to source (A-NR)
(in the flag area)
a a a a a
a
a a a
a
a
a a a
a
a
a a a
a
a a a a a
LAN
bus
L2-RECEIVE FB
Source (A-NR ˆ=TLN)
Data
DB 61
DB 62
DB 63
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
Net data
1 to 242 bytes
DB 50
yes
no
o.k. to transmit?
Status byte/SEND
to destination (A-NR)
(in the flag area)
L2-SEND FB
Destination(A-NR ˆ= TLN)
Data
DB 51
DB 52
DB 53
a a a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a
a a a a a a a a a a a a a a a a a a a a a a a a
a
a a a a a a a a a a a a a a a a a a a a a a a a a a
Net data
1 to 242 bytes
a a a a a
a
a a a
a
a
a a a
a
a
a a a
a
a a a a a
e.g., S5-95U Destination PLC e.g., S5-95U
Explanations to Figure 6-2:
When there are no more jobs running on the PLC-to-PLC connection, the 'send' status byte
indicates that it is okay to transmit. L2-SEND is called up from the user program. L2-SEND receives
the following information from the parameter assignment:
• where to send the data (job number)
• where the net data are stored
The net data are transmitted to the addressed receiver via the network. At the receiver, a bit in
status byte ‘Receive’ indicates that the data arrived. The receiver can fetch the data by means of
L2-RECEIVE.
6-2 EWA 4NEB 812 6112-02

Siemens SINEC L2 Specifications

General

Brand	Siemens
Model	SINEC L2
Category	Controller
Language	English