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
5.8 Basics of Entries at Command Block FC11
The values for DB47 are specified by means of the input variables of FC11.
One UDT21 is used for each request or command.
Data View of the UDT21
Command Overview
Command (hex)
Normal Chained*
Command
01 41 Write data to MDS
02 42 Read data from MDS
03 43 Initialize MDS
04 44 Reader status
06 -- NEXT
08 48 END; end communication with the MDS
0A 4A Aerial on/off
0B 4B MDS status
*) Not all readers or IM modules support chained commands. Note the information in the MOBY
manuals for configuration, installation and service.
Writing data to the transponder
Command
(hex)
Sub_command length
[dec]
address_MDS [hex] DAT_DB [dec] Comment
01 - 1 to 32767 *
Length of the
MSD data to be
written
0000 to FFFF
Starting with this
start address, the
data is written to the
MDS
Pointer to the
user data that
is to be written
to the MDS
Reading data from the transponder
Command
(hex)
Sub_command length
[dec]
address_MDS
[hex]
DAT_DB
[dec]
Comment
02 - 1 to 32767 *
Length of the
MSD data to be
read
0000 to FFFF
Starting with this
start address, the
data is read from
the MDS
Pointer to the
user data.
Here, FB45
stores the
MDS data that