Technical data

Receiving: on the CP
➣ A frame containing changes is received.
➣ Locally configured objects are filtered out of the frame.
➣ All the filtered values are entered in the input area of the PLC.
Fig. 9.1 is a schematic representation of transmission and reception using
the "global I/Os area". A byte to be transmitted from station 1 is written to
output byte 7 (PY 7). The global I/Os byte 10 (GPB 10) is assigned to PY 7.
The transmitted byte is received at station 2 as input byte 1 (PY 1) because
PY 1 is assigned to GPB 10 in this station.
PY 7 of station 1 is therefore in a sense directly "wired" to PY 1 of station 2
via GPB 10.
Each station which assigns GPB 10 to an input byte as shown in the
previous example is also the receiver of this byte.
CPU1
PY7
CPU2
PY1
CP 5430 TFCP 5430 TF
PY7=>GPB10
GPB10=>PY1
Station 1
Station 2
GPB10
L2 bus cable
011010110
011010110
CP 5431 FMS CP 5431 FMS
Fig. 9.1: Transmitting and Receiving Using the Global I/O Area
B8976060/02 Communication with Global I/Os
9 - 5 Volume 1