Parameter assignment and configuration
4.4 Ident instructions
Communications module RF120C with application blocks for S7-1200 and S7-1500
Operating Instructions, 07/2013, C79000-G8976-C328-01
37
4.4.3
Write
The "Write" block writes the data from the "IDENT_DATA" buffer to the transponder once.
The physical address and the length of the data are transferred using the "ADR_TAG" and
"LEN_DATA" parameters. Up to 1024 bytes can written with one job.
Figure 4-11 "Write" function block
Table 4- 16 Explanation of the "Write" function block
Parameter
Data type
Description
ADR_TAG
WORD
Physical address on the transponder where the
write starts. You will find more detailed
information on addressing in the section
"Transponder addressing (Page 40)".
LEN_DATA
INT
Length of the data to be written (1 ... 1024 bytes)
UID
Array [1...8] of Byte
Unique Identifier of the transponder
In single tag mode, this parameter is not used
(UID = 0). In multi-tag mode you obtain the UID
of the transponder using the Inventory command
("AdvancedCmd" function block).
IDENT_DATA
Array [1...1024] of
Byte
Data buffer with the data to be written.
