Siemens SIMATIC RF1070R Handbuch - Seite 9

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2 Engineering of the STEP 7 Program

2.2

Function block "ReadUID"

The "ReadUID" function block contains all functionality for communicating with the

RF1070R reader.

The "ReadUID" function block is a custom development for this application

example and is already integrated in the STEP 7 project so that you can adapt it to

your requirements. It is called cyclically in OB1 and automatically automatically

calls the point-to-point instructions "Port_Config", "Send_P2P" and "Receive_P2P".

Function

Function block "ReadUID" realizes

•

the configuration of the CM1241 RS232 communication module

•

the initialization of the RF1070R reader

•

monitoring of the RF1070R reader's antenna field

•

selection of the card located in the antenna field

•

receipt and analysis of the UID

•

output of status and error messages from the block.

This functionality is implemented as a simple sequencer with the following states:

Reading out UID with SIMATIC RF1070R

Article ID: 109780625,

V1.0,

09/2020