Siemens CP1430 TCP User Manual

2 Engineering
Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2, 07/2019
36
© Siemens AG
2019 All rights reserved
2.3.3 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.
OB 1
Main
OB 21
Startup
FB33
HTB
SEND_ALL
HTB
RECV_ALL
SEND_DB
RECV_DB
User
blocks
Handling
blocks
Data blocks
OB 22
Startup
HTB
SYNCHRON
HTB SEND
HTB RECV
Function
Via the connection actively established by the S7-1500 CPU, data are sent
bidirectionally with a count value from the SIMATIC S5 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 and
the count value is reset.
Description of the blocks
The following blocks contain the communication program of the S5-CPU.
Table 2-10
Block
Symbol
Description
OB 21
Startup_OB21
Startup OB (restart/warm start)
OB 22
Startup_OB22
Startup OB (network/cold start)
OB 1
Main
User program call of FB 33 and of the HTBs
SEND/RECEIVE ALL
FB 33
ID105_S7
Time-triggered call of the send and receive
functions via S5 handling blocks (HTBs).
Increase of count value in the data
FB 244
HTB_SEND
Handling block SEND-All (A-NR:= 0)

Siemens CP1430 TCP Specifications

General

Brand	Siemens
Model	CP1430 TCP
Category	Controller
Language	English