Communications Commands and Responses
Section 5-3
5-15
2)
Polling Single Auto Write (PW)
Immediately after receiving the Polling Single Auto Write Command, the Controller returns a re-
sponse indicating the acceptance of the command and waits for a Tag to enter the communica-
tions area of the Antenna. Then it writes data to the entering Tag. The host can inquire of the
Controller the results of communications processing using a subcommand.
Read verification processing is performed for this command and so it is not necessary to per-
form it again.
Command Frame Structure
STX
Node No. Command
code
“PW”
Data
type
First write
page
No. of
write
pages
Write data
ETX BCC
1
2
2
1
2
2
Specified number
1
1
Data type
Specifies whether the read data is represented in ASCII or HEX.
A: ASCII code
H: HEX code
For details, refer to 5-6 Data Type.
First write page
Specifies the first address for writing data to Tags in HEX.
Specifiable range: 00h to 0Ah, FFh
(FFh can be specified only when using Philips’ block 4 as user memory. For details,
refer to 2-5 Tag Memory Map.)
No. of write pages
Specifies the number of pages to which data is written in HEX.
Setting range: 01h to 0Ch
Write data
Indicates data to be written to the Tag. The number of characters of the data is as
follows:
ASCII code: No. of write pages x 4
HEX code: No. of write pages x 8
Response Frame Structure
STX Node No.
Retry
flag
Command
code
“PW”
Response
code
“74”
ETX BCC
1
2
1
2
2
1
1
Response code
74: Command received.
For other response codes, refer to 5-10 Response Code List.
Note: Philips’ block 4 can be used as user memory with Controller software ver-
sions 1.5 or later. The software version can be read with the Version Com-
mand (VS).
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