Programming Ident Blocks; Basic Blocks; Read - Siemens SIMATIC RF650R Configuration Manual

8.5

Programming Ident blocks

8.5.1

Basic blocks

8.5.1.1

Read

The "Read" block reads the user data from the transponder from memory bank 3 (USER
area) and enters this in the "IDENT_DATA" buffer. The physical address and the length of
the data are transferred using the "ADR_TAG" and "LEN_DATA" parameters. Specific
access to a certain transponder takes place with the optional "EPCID_UID" and "LEN_ID"
parameters.
Figure 8-6
Table 8- 3
Parameter
ADR_TAG
LEN_DATA
LEN_ID
EPCID_UID
IDENT_DATA
SIMATIC RF650R/RF680R/RF685R
Configuration Manual, 03/2018, C79000-G8976-C386-06
"Read" block
Explanation of the "Read" block
Data type
DWord
Word
Byte
Array[1...62] of
Byte
Any / Variant
Programming via SIMATIC controller
Default values Description
DW#16#0 Physical address on the transponder
where the read starts.
W#16#0 Length of the data to be read
B#16#0 Length of the EPC-ID/UID
Default value: 0x00 ≙ unspecified
single tag access (RF680R, RF685R)
0 Buffer for up to 62 bytes EPC-ID
2 - 62-byte EPC-ID is entered at the
start of the buffer (length is set by
"LEN_ID")
0 Data buffer in which the read data is
stored.
Note:
For Variant, currently only an "Ar-
ray_of_Byte" with a variable length
can be created. For Any, other data
types/UDTs can also be created.
8.5 Programming Ident blocks
119