Product Description; Field Of Applications; Hardware And Software Prerequisites - Siemens SIMATIC S7 Manual

1

Product Description

1.1

Field of Applications

Placement in the
System Environ-
ment
Function of the
FBs
Use of Port
Number 502
1.2

Hardware and Software Prerequisites

Usable Modules
Software Versions
MODBUS / TCP communication via the integrated PN interface of the CPU
2XV9450-1MB02; Manual edition 2.1
The function block described here is a software product for PLCs with
integrated PN interface of Simatic S7-300, S7-400 and IM 151-8 PN/DP CPU.
With these function blocks, communication link is established between a
Simatic PLC with integrated PN interface and a device that supports the Open
MODBUS/TCP protocol.
Data transmission is carried out in accordance with the client-server principle.
The SIMATIC S7 can act as both, a client and a server, during the data
transmission.
In general, the protocol uses the port 502. This port number has not been
released for all PN PLCs yet and is only possible when using a 319 CPU, an
IM 151-8 PN/DP CPU, a 414 CPU or a 416 CPU with the corresponding
firmware version. You can find further information about the released port
numbers in the relevant manual of your PLC.
The PLC only allows a one-time use of a specific port number. Therefore
the PLC/FB cannot be addressed simultaneous from different devices on the
same port number.
The function blocks have been tested on the PLCs with the product
identifications
CPU315-2 PN/DP
CPU317-2 PN/DP
CPU319-3 PN/DP
CPU414-3 PN/DP
CPU416-3 PN/DP
IM151-8 PN/DP
You can find the latest hardware prerequisites on the internet:
www.siemens.com/s7modbus.
The usage of the FB MODBUSPN is possible with STEP7 Version 5.4 SP4 or
higher.
6ES7315-2EG10-0AB0
6ES7317-2EK13-0AB0
6ES7318-3EL00-0AB0
6ES7414-3EM05-0AB0
6ES7416-3FR05-0AB0
6ES7151-8AB00-0AB0
Product description
1-1