Data Transmission Using A Standard Connection; Features Of A Standard Connection - Siemens SIMATIC S5 Manual

S5-95U, SINEC L2
4 Data Transmission Using a Standard
Connection
This chapter provides you with the following information:
• How this type of data transmission functions in principle
• How to set parameters for the programmable controllers
• How to program with STEP 5 for this type of data transmission (examples)
4.1

Features of a Standard Connection

• The standard connection is particularly appropriate for:
- The transmission of large quantities of data ( 242 bytes)
- A homogeneous networking of S5-95U programmable controllers
Communication with other devices, such as with the CP 5430-1 (Order no. 6GK1 543-0AA01), is
also possible.
• Active and passive L2 stations can participate on the network.
• There are two ways to transmit data:
- Any active L2 station can transmit to any other active station.
- Any active L2 station can transmit simultaneously to all other connected active and passive
stations (broadcast, see section 4.6).
• Active stations must have a transmitter or receiver number.
address used to address the stations. A station address must be within the range of 1 to 31. A
station address may be assigned only once on the network.
• Programmable controller parameters are set in data block DB1 to enable data exchange.
Figure 4-1 shows a possible hardware configuration for the standard connections described in
section 1.5. All of the examples used in sections 4.2 through 4.5 refer to this configuration.
Active
stations
Bus
Passive
stations
Standard connection (SC)
Figure 4-1. Example of a Hardware Configuration for a Standard Connection
EWA 4NEB 812 6112-02

Data Transmission Using a Standard Connection

S5-95U
SC
(PLC 1)
None
This number is the L2 station
S5-95U
. . .
(PLC 2)
4-1