Communication Via Sinec L1 Lan - Siemens SIMATIC S5-90U System Manual

S5-90U/S5-95U

Communication via SINEC L1 LAN

14 Communication via SINEC L1 LAN
SINEC L1 is a local area network that enables SIMATIC S5 programmable controllers to communi-
cate with each other. It operates on the master-slave principle.
One single programmable controller, called master, is responsible for the entire communication and
monitoring of the data exchange in the local area network, as well as for enabling and monitoring of
programming functions via the LAN. All other programmable controllers connected are slaves.
BT 777 bus terminal
Master
PG Slave Slave
30 slaves max.
Figure 14-1. Structure of a SINEC L1 LAN
You will find more exact information on the SINEC L1 in the "SINEC L1" manual (Order No. 6ES5
998-7LA21). You need to understand the SINEC L1 operating system before continuing with this
chapter.
The S5-90U/S5-95U can be connected directly to the SINEC L1 as a slave. The information you
need to perform this operation is explained in this chapter.
14-1
EWA 4NEB 812 6115-02b