Siemens SIMATIC Ident RF200 - Page 27

Scan mode function extension for ASCII readers
3.3 Communication in scan mode
ASCII protocol for RF200
Operating Manual, 11/2016, C79000-G8976-C329-04
27
The “Transmission in ASCII format” setting means that the four higher-order bits are
converted and transmitted first followed by the four least significant bits, irrespective of the
“ByteOrder” parameter.
Data description
The following table lists all parameters available in the reader. The byte indication refers to
the entry in the “Change parameter” frame to the reader.
If a parameter value consists of two bytes, the MSB is always transferred first. The bolded
value in a cell in the “Value” column is the preset default value.
Table 3- 5 Description of the parameters
Byte
Value
Meaning
Description
0
21
21
Current length of the parameters in the frame (in bytes). This value is always 21.
1 0 reserved Tag type
Setting of the air interface/transponder used
1
ISO general
255 ISO user-
defined
2
30
30 %
Modulation
Air interface optimization: setting is only possible by selecting “ISO user-defined”
0-100
0-100 %
3
0
single
Subcarrier
Air interface optimization: setting is only possible by selecting “ISO user-defined”
1
double
4
0
high
Data rate
Air interface optimization: setting is only possible by selecting “ISO user-defined”
1
low
5
0
Single tag
Operating mode
Only single tag setting is possible. If there are multiple transponders in the antenna
field, these are not identified and cannot be processed.
1 reserved
6
0
Continuous
Read
Scan mode
Selection of scan mode sequence
• Continuous read: Read operations are executed continuously. The “Locktime”
parameter defines the distance between read operations. All UIDs of identified
transponders are reported. The UID of a single transponder can be reported mul-
tiple times.
• Single read: Read operations are executed continuously. All UIDs of identified
transponders are reported one time. A single UID cannot be reported multiple
times in succession, even if the transponder is in the antenna field for an extend-
ed period. The UID must first change.
• Single read repeated: Read operations are executed continuously. All UIDs of
identified transponders are reported. The UID of a single transponder can be re-
ported multiple times.
1
Single Read
2
Scanmode Off
3 Single Read
repeated
7 + 8
10
10 * 100 ms
Lock time
Setting for lock time duration for continuous read mode
1...6553
5
(1...65535) *
100 ms
9 re-
served
-- Transmit power
Transmit power setting to optimize communication with the transponder. Only possi-
ble with RF38xR.