Siemens S7-300F-2 Manual de usuario descargar pdf (Pagina 10)

Industry Automation and Drive Technologies - SCE

TIA Training Document

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Module E11

Status: 01/2010 Radio Frequency Identification (RFID) with SIMATIC S7-300F-2PN/DP and

RF180C

5 STARTING UP AN RFID PROJECT WITH CPU 315F-2 PN/DP AND RF180C

Below, the startup of an RFID project is described.

As SIMATIC S7-300 station, the CPU 315F-2 PN/DP is used.

In the CPU’s control program, a data structure has to be generated -by means of a function block call

(FB45)- with data blocks and embedded UDT data types.

In our example, it has to be possible to perform the following actions for each reader:

- Writing data to the transponder (DB48 of the CPU to the MDS).

- Reading the data from the transponder (MDS to DB48 of the CPU).

- Reading the transponder data information (MDS to DB49 of the CPU).

- Reading the reader status information (reader to DB50 of CPU).

The data structure of the German language UDTs is as follows:

To generate the data structure, the required UDT data types have to be imported to the

Step 7 project and function block FB45.

A sample program with the blocks is provided on the CD "RFID Systems“.

Additional information about the data structure is available in the function manual

"RFID Systems FB45“

DB47 DB45

a UDT11

integrated

for each reader

DB1

Multi-instance

DB of FB45

des FB45

FB45

for Reader 1

Per commd UDT21

FB45

for Reader 2

DB1

Multi-instance

DB of FB45

des FB45

UDT11

Byte 0 to

Byte 49

to Reader 1

UDT11

Byte 50 to

Byte 99

to Reader 2

Write to MDS

Command 01

Read from MDS

Command 02

DB48

General data

Source data

Destination data

Read MDS status

Command 0B/01

Read MDS Status

Command 0B/02

DB49 MDS Status

UDT261

UDT271

Read reader status

Command 04 /01

Read reader status

Command 04/06

Reader diagnosis

DB50 Reader Status

UDT111

UDT281

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 64 65

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