Siemens SIMATIC S7-1200 System Manual page 1091

Hide thumbs Also See for SIMATIC S7-1200:

Function manual (527 pages)

Manual (364 pages)

System manual (338 pages)

page of 1614

/ 1614
Contents
Table of Contents
Bookmarks

Table of Contents

PtP Freeport over PROFIBUS or PROFINET

PtP enables you to use a PROFINET or PROFIBUS distributed I/O rack to communicate to

various devices (RFID readers, GPS device, and others):

● PROFINET (Page 804): You connect the Ethernet interface of the S7-1200 CPU to a

PROFINET interface module. PtP communication modules in the rack with the interface

module can then provide serial communications to the PtP devices.

● PROFIBUS (Page 968): You insert a PROFIBUS communication module in the left side

of the rack with the S7-1200 CPU. You connect the PROFIBUS communication module

to a rack containing a PROFIBUS interface module. PtP communication modules in the

rack with the interface module can then provide serial communications to the PtP

For this reason, the S7-1200 supports two sets of PtP instructions:

● Legacy point-to-point instructions (Page 1217): These instructions existed prior to version

V4.0 of the S7-1200 and only work with serial communications using a CM 1241

communication module or CB 1241 communication board.

● Point-to-point instructions (Page 1108): These instructions provide all of the functionality

of the legacy instructions, plus the ability to support PtP communication modules over

PROFINET and PROFIBUS distributed I/O. The point-to-point instructions allow you to

access the communication modules over the distributed I/O rack.

The S7-1200 CM 1241 modules must have a minimum firmware version of V2.1 to use

the point-to-point instructions. These modules are limited to the local rack to the left side

of the S7-1200 CPU.

Communications over distributed I/O use the following modules:

You can use the point-to-point instructions to access local (or left side) serial modules, serial

modules over PROFINET and serial modules over PROFIBUS. STEP 7 provides the legacy

point-to-point instructions only to support existing programs. The legacy instructions still

function, however, with the current S7-1200 CPUs. You do not have to convert prior

programs from one set of instructions to the other.

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK

CM PtP RS232 BA

CM PtP RS232 HF

CM PtP RS422/485 BA

CM PtP RS422/485 HF

Communication processor and Modbus TCP

13.3 Point-to-point (PtP) communication

Article number

6ES7540-1AD00-0AA0

6ES7540-1AB00-0AA0

6ES7540-1AD00-0AB0

6ES7540-1AB00-0AB0

6ES7540-6AA00-0BA0

RS232 and RS422/RS485

Siemens SIMATIC S7-1200 System Manual page 1091

Related Manuals for Siemens SIMATIC S7-1200

Related Products for Siemens SIMATIC S7-1200

Table of Contents