Communication Program Simatic S5 - Siemens SIMATIC S5 Manual

2 Engineering
In addition, the received data are checked.
The data are cyclically checked for a deletion identifier ("A1A1") being
-
available. In case of a match, the count value is reset.
- The ongoing communication of the OUC communication is visualized via the
output area of the S7-1500.
2.4.3

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 an active ISO-on-TCP connection.
The connection is established from the SIMATIC S5.
OB 21
Startup
OB 22
Startup
OB 1
Main
Function
Via the connection actively established by the SIMATIC S5, data are sent
bidirectionally with a count value to the S7-1500 every second. From there, this
count value is mirrored and sent back. After the data have been received, this
count value is increased by +1 and sent again.
In case of the SIMATIC S5 CPU being restarted, a deletion identifier is sent to the
S7-1500 and the count value is reset.
Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2,
FB34
SEND_ALL
User
blocks
07/2019
HTB
SYNCHRON
HTB SEND
SEND_DB
HTB RECV
HTB
HTB
RECV_ALL
Handling Data blocks
blocks
RECV_DB
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