Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2, 07/2019
OB 100 (startup OB)
OB 1 (cyclic OB)
FB 4 (TSEND/TRCV management)
All these blocks of the program are structured identically to scenario 2a.
2.6.3 Communication program SIMATIC S5
Overview
The following blocks contain the communication program of the S5-CPU. In this
scenario, the S5 sends and receives data via a passive ISO-on-TCP connection.
The connection is established from the S7-1500.