Siemens SIMATIC Ident - Data Structure of the Ident Profile

Setting parameters for blocks
3.5 Programming the Ident profile
Ident profile and Ident blocks, standard function for Ident systems
Function Manual, 10/2018, C79000-G8976-C387-04
75
Output parameter
Data type
Default value
Meaning
UIN0
BOOL
FALSE
With RFID readers, the number of transponders in the an-
tenna field is indicated. UIN0 ... UIN3 can be interpreted as
binary values.
Example:
UIN3 = 0; UIN2 = 0; UIN1 = 1; UIN0 = 1
⇒ 3 transponders
With optical reader devices, the various states of the reader
are displayed.
• UIN0: Corresponds to "IN_OP" bit of the reader
• UIN1: Corresponds to "RDY" bit of the reader
• UIN2 + UIN3: These two bits are interpreted as an un-
signed value (bit 2 is the less significant bit) that repre-
sents the number of available decoded codes. If the
value = 3, three or more decoded codes are available.
UIN1 BOOL FALSE
UIN2
BOOL
FALSE
UIN3 BOOL FALSE
TRLEN INT 0 Number of data elements received after successful execu-
tion of the command.
3.5.3
Data structure of the Ident profile
Each time the Ident profile is called, you need to supply the parameters ("HW_CONNECT",
"CMDREF", "TXREF" and "RXREF") with values as described in section "Structure of the
Ident profile (Page 71)".
The call for the Ident profile is always via the input parameter "HW_CONNECT" and the
"IN/OUT" parameters "CMDREF", "TXREF" and "RXREF". All three parameters need to be
created in a data block. The relationship between the three "IN/OUT" parameters is
described in greater detail below:
● CMDREF (command buffer):
– Array[1...n] of CMD_STRUCT
● TXREF (send buffer):
– Array[1...n] of Byte
– For Any, other data types/UDTs can also be created.
● RXREF (receive buffer):
– Array[1...n] of Byte
– For Any, other data types/UDTs can also be created.