Siemens SIMATIC S7-1200 - Page 830

Communication
11.2 PROFINET
S7-1200 Programmable controller
830 System Manual, V4.2, 09/2016, A5E02486680-AK
The following example shows the communication between two CPUs that utilize 1
connection for both sending and receiving the data.
● Each CPU uses a TCON instruction to configure the connection between the two CPUs.
● The TSEND instruction in CPU_1 links to the TRCV instruction in CPU_2 by using the
connection ID ("connection ID 1") that was configured by the TCON instruction in CPU_1.
The TRCV instruction in CPU_2 links to the TSEND instruction in CPU_1 by using the
connection ID ("connection ID 1") that was configured by the TCON instruction in CPU_2.
● The TSEND instruction in CPU_2 links to the TRCV instruction in CPU_1 by using the
connection ID ("connection ID 1") that was configured by the TCON instruction in CPU_2.
The TRCV instruction in CPU_1 links to the TSEND instruction in CPU_2 by using the
connection ID ("connection ID 1") that was configured by the TCON instruction in CPU_1.
①
TCON on CPU_1 creates a conne
c-
tion and assigns a connection ID for
that connection on CPU_1 (ID=1).
②
TCON on CPU_2 creates a conne
c-
tion and assigns a connection ID for
that connection on CPU_2 (ID=1).
③
TSEND and TRCV on CPU_1 use the
connection ID created by the TCON
on CPU_1 (ID=1).
TSEND and TRCV on CPU_2 use the
connection
ID created by the TCON
on CPU_2 (ID=1).