Commands
2597
78 2013-
02
113
Operating mode
“
Default Read
”
In "default read" operating mode, 1 or 2 words are read extremely quickly. The
area of memory earmarked for reading is already specified on the tag. The R/W
head does not have to identify the memory area for the tag.
The start and end of the read range are stored in the bytes 0 and 1 of the control
word. As soon as power is supplied to the tag, it sends data from the data range
defined by the start and end of the read range. The data range between read
range start and end is read with the read commands
SR
(Single read words) and
ER
(enhanced buffered read words) when <WordAddr> is set to 0000h and
<WordNum> to 00h.
The advantage of "default read" operating mode is the readout speed. The
readout of one data word (4 bytes) is twice as fast in this mode as the other
modes. The readout of two words takes approx. 1/3 less time. No more time
advantages can be gained after three data words because "default read" mode is
designed to read a maximum of two words (= 8 bytes). Reading larger data
ranges can lead to error messages if the reading head does not respond within
the planned reaction time.
Setting "Default Read"
1. Activate the password mode.
2. Write the read range start and end into the "Control Word".
3. Deactivate the password mode.
4. Read the data range with address designation 0000h and word count 0h.
IPC03 configuration
Single get configuration (SG):
The R/W head makes exactly one attempt to read a word in the configuration
range ("Protection Word" or "Control Word") from the address <ConfAddr>.
Enhanced buffered get configuration (EG):
The R/W head attempts to read a word in the configuration range from the
address <ConfAddr> until successful. Only data that changes is transferred via
the interface, i.e. the R/W head transfers data whenever it reads a new data carrier
or whenever it reads a data carrier where there was previously no R/W head
within the detection range.
The status '05h' (read/write command) is output when the data carrier leaves the
detection range or if the data carrier is not yet within the detection range when the
command is executed.
If two data carriers enter the read range one immediately after the other, the status
'05h' is not issued between the two readings.
Command:
SG
<Ident channel><ConfAddr><CHCK><ETX>
Response:
<Status><Ident channel><Data><CHCK><ETX>
Command:
EG
<Ident channel><ConfAddr><CHCK><ETX>
Response:
<Status><Ident channel><Data><CHCK><ETX>
