Communication Program In The Simatic S7-1500 - Siemens SIMATIC S5 Manual

2 Engineering
Table 2-9
No.
1 Startup of the SIMATIC S5 and synchronization with the CP1430 TCP.
2 The cyclic processing of the HTB RECEIVE block in the S5-CPU ensures readiness
to receive between the CPU and the CP1430 TCP. The data are transferred from
the CP1430 TCP to the data block of the SIMATIC S5-CPU via the RECEIVE ALL
handling block.
3 The SIMATIC S5 transfers the SEND job to the CP1430 TCP via HTB SEND. The
data are transferred from the SIMATIC S5-CPU (data block) to the CP1430 TCP via
the SEND ALL handling block.
4 The received data are transferred to the S7-1500 CPU via the cyclic processing of
the OUC block TRCV. If the data have been received successfully, this is shown by
a positive acknowledgment and signaled at block parameter NDR. Otherwise, a
negative acknowledgment will be sent for the job.
5 A SEND job is sent from the S7-1500 CPU to the SIMATIC S5 via the OUC block
TSEND. In this scenario, the block sends a job to the SIMATIC S5 CP1430 TCP
every second. In the S5-CPU, the data are transferred via the standard HTBs
RECEIVE and RECEIVE ALL.
2.3.2

Communication program in the SIMATIC S7-1500

Overview
The following blocks contain the communication program in the S7-1500 CPU.
OB 100
Startup
OB 1
Main
Function
The function block FB4 is used to call the OUC communication blocks TSEND and
TRCV. In this variant of OUC communication, the connection is established by an
"actively" parameterized ISO-on-TCP connection. After having restarted the S7-
1500 CPU, the connection will be established automatically.
Ethernet Communication (ISO on TCP) between SIMATIC S5 and
SIMATIC S7-1500 Controllers
Entry-ID: 109482475, V1.2,
RecvData
SendData
FB4
ConnManager
ParamID105
User
blocks
07/2019
Process
TSEND
TRCV
OUC system
blocks
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