Siemens SIMATIC RF1070R Manual - Página 4

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1 Introduction

Introduction

1.1

Overview

Starting point

Companies have been using RFID-based identification card systems for many

years to control access to buildings. The growing need for security and increasing

requirements for documentation call for solutions that can control access to

machines and equipment on a user-specific basis. The SIMATIC

RF1040R/RF1070R readers provide the option of using employee identification

cards even when operating machines. This allows finely graded access concepts to

be implemented or user-specific instructions to be stored - all with one card.

Requirement

A reader at the entrance to a company's factory must read the serial number (UID)

of a card and transmit to a SIMATIC S7 station via the communication interface of

the automation system. You can then use this UID to implement conditions for

access authorization or sharing on a machine in the S7 program.

The following figure provides an overview of the automation task.

Figure 1-1

SIMATIC

PLC

Use case

•

Use of a compact controller from the S7-1200 series

•

Transmit the UID from the SIMATIC RF1070R reader to the

SIMATIC S7 CPU via the CM1241 RS232 communication module.

Solution approach

The RF1070R reader can be linked to a SIMATIC S7-1200 CPU using the CM1241

RS232 communication module. With this link, communication happens over the

Freeport protocol. The Freeport protocol offers the ability to communicate directly

with the reader.

Note

The RF1040R/RF1070R reader has two interfaces:

•

USB

•

RS232 serial interface

Only the RS232 serial interface is required for this application example. The USB

interface can be ignored.

Reading out UID with SIMATIC RF1070R

Article ID: 109780625,

V1.0,

Automation system

Communication

interface

09/2020

RFID

RS232

reader