Technical data

3.2.2.2 Addressing Model for Implicit Communication (GP, DP ZP)

In data transmission using implicit communication via L2, the data exchange

is handled via the I/O area of the SIMATIC PLC.

All I/O bytes via which you want to send and all I/O bytes via which you

want to receive must be assigned to the appropriate I/O protocol by

configuring the I/O areas in COM.

In GP (global I/Os) communication, I/O bytes are assigned to global objects

of the GP during configuration.

Sending and receiving stations must be active. Both functions, sending and

receiving are possible in one station.

Communication is via global objects which form the connection (the "bus").

Global objects (GOs)

Unique

assignment

Non-unique

assignment

Receiving

station

Sending

station

active

Output areas

Input areas

"L2 bus"

PLC

Fig. 3.7 Addressing Model for Communication with GP

B8976060/02 Fundamentals of the Model

3 - 9 Volume 1