Balluff BIS U-6127-081-1 4-06-ST36 Betriebsanleitung Seite 318

BIS U-6127-081-1_4-06-ST36
Processor unit
9
OPC UA (continued)
ReadTag
This method can be used to read a specific memory area
of a tag. The area and how many bytes are to be read are
specified in the call parameters.
The area to be read must not exceed the selected memory
area, otherwise the Read command cannot be executed
and returns an error. The size of the individual memory
areas depends on the respective tag. Detailed information
can be taken from the data sheet of the data carrier used.
Call parameter
Name Data Type
Identifier ScanData
(see chap-
ter 9.7.14 on
page 164)
CodeType CodeTypeData-
Type (see chap-
ter 9.7.4 on
page 162)
Region UInt16
Offset UInt32
Length ByteString
Password BytesString
142 english
Description
EPC of the tag to be
read from.
Specifies the type
for the Identifier
parameter.
Memory area of the
tag to be read. The
following values are
possible:
0: Reserved bank
(kill and access
passwords)
1: EPC bank
2: TID bank
3: USER data bank
Specifies the byte
address of the first
byte to be read.
Specifies the length
of the area to be
read. The complete
area (Off-
set + Length −1)
must be within the
selected memory
area.
If the area to be read
is locked, the corre-
sponding 4-byte-
long password must
be entered here.
Otherwise the value
"00000000" must
be entered.
Output parameter
Name Data Type
ResultData ByteString
Status AutoIdOperati-
onStatusEnu-
meration (see
chapter 9.7.2 on
page 161)
Description
The successfully
read data are output
here as a Byte-
String.
Returns the result of
the operation.