User Manual

2022-11
40
IUH-F192-V1-*
Operation
The meaning of the remaining bits is described in EPC Gen 2 (ISO/IEC 18000-63). If a UII/EPC
has the length 12 octets, i.e., 6 words (00110
bin
), and all other bits are equal to 0, the protocol
control word corresponds to 00110000 00000000
bin
or 3000
hex
. If some of the other bits are
not equal to 0, this produces a different protocol control word.
Single Read Words SR
One attempt is made to read <WordNum> 32-bit words from address <WordAddr>.
Example:
SR1000101 reads a 4-byte word from memory address "0001."
Enhanced Read Words ER
Continuous attempts are made to read <WordNum> 32-bit words from the address
<WordAddr>. Only changing data is transferred via the interface. When a read/write tag leaves
the read range, status 5 is output.
Example:
ER1000101 continuously reads a 4-byte word from memory address "0001".
00000
bin
No word 0 bits
00001
bin
One word 16 bits
00010
bin
Two words 32 bits
... ... ...
11111
bin
31 words 496 bits
Note
Several Tags in the Measurement Range
If there is more than one tag in the measurement range when this command is run, the UII is
written to the first tag only. Status A is output for all other tags.
Command: SR <ChanNo> <WordAddr> <WordNum> <CHCK> <ETX>
Response: <Status><ChanNo><Luii><UII><Ldata><Data><CHCK> <ETX>
F <ChanNo> 0001<CHCK> <ETX>
Note
The memory bank (MB) parameter defines the bank accessed by this command. see
"Memory Module for Tag Accesses to the "Memory Bank" MB" on page 50.
Command: ER <ChanNo> <WordAddr> <WordNum> <CHCK> <ETX>
Response: <Status><ChanNo><Luii><UII><Ldata><Data><CHCK> <ETX>
Note
The memory bank (MB) parameter defines the bank accessed by this command. see
"Memory Module for Tag Accesses to the "Memory Bank" MB" on page 50.