Siemens SIMATIC S5 Manual page 75

2 Engineering
Scenario 5 – Communication via programmed OUC
2.8
(compact instructions) and internal CPU interface
2.8.1 Mode of operation
Overview
This scenario presents a variant of the OUC communication, in which the S7-1500
station uses the compact OUC block "TSEND_C" to send data to the SIMATIC S5.
In this case, the receipt of the data is implemented via the standard OUC block
TRCV.
Via the CP1430 TCP, the S7-1500 station actively establishes an ISO-on-TCP
connection to the SIMATIC S5 using its internal CPU interface.
For this connection, the SIMATIC S5 uses the standard handling blocks
SYNCHRON/SEND/RECEIVE. In the CP1430 TCP, the ISO-on-TCP connection in
the SIMATIC S5 is configured as a "passive" duplex connection.
Flow chart
Sequence of the programmed OUC communication between S7 and S5 via compact
instructions
The figure below schematically shows the connection established and the data flow
between SIMATIC S5 and SIMATIC S7-1500 using the programmed SEND and
RECEIVE mechanism via ISO-on-TCP.
SIMATIC S5 CPU
OB1
FB40
Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2,
1
HTB
SYNCRON
SEND
SEND job trigger
HTB
SEND
3
SEND Value 1
ALL Value 2
...
...
...
RECEIVE
5
RECEIVE ready to receive
HTB
RECEIVE
Value 1
Value 2
...
RECEIVE
...
ALL
...
07/2019
Conn.
CP1430 PNIO-SS
establ.
TCP
CR
Connection
Connection
configuration
CC
A_NR
TSAP 1
SEND/RCV
...
Data
Acknowledgment
Acknowledgment
SIMATIC S7-1500 CPU
4
RECEIVE
TRCV
Value 1
Value 2
...
2
structure of
connection
TSEND_C
ID 6
TSAP 1
Value 1
SEND/RCV
...
Value 2
...
SEND
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