Communications Command
Section 5-3
5-18
5-3-7 Polling Check (PC)
You can check the results while the Polling Single Auto Read Command and Polling Single Auto
Write Command are being executed. You can use Polling Check after the Polling Single Auto Read
Command and Polling Single Auto Write Command have been sent.
<Command Format>
STX
Node No..
Command code
“PC”
ETX BCC
1 2
2 1
1
<Response Format>
(1) Response to Polling Single Auto Read Command (PR)
STX Node
No.. Retry
flag
Command code
“PR”
Response
code
“00”
UID(SNR) Read
data
ETX
BCC
1 2 1 2
2
16
As
specified
1
1
(2) Response to Polling Single Auto Write Command (PW)
STX Node
No.. Retry
flag
Command code
“PW”
Response
code
“00”
UID(SNR) ETX
BCC
1 2 1 2
2
16
1
1
(3) Response when a Tag is not detected
A response when Polling Check Command is received before the communications with a Tag is
completed.
STX Node
No.. Retry
flag
Command code
“PC”
Response
code
“74”
ETX BCC
1 2 1 2
2 1
1
Response code
00:normal completion
74: In a case before the communications with a Tag is completed.
For other response codes, refer to 5-2-4 Response code List.
UID (SNR)
Indicates UID (SNR) data having read from a tag.
UID (SNR) (Tag-specified code) additional setting (refer to 5-6-5 SN Com-
mand) is added when it is valid as follow
•
Polling Single Auto Read: UID (SNR) is added before Read data.
•
Polling Single Auto Write: When it is in ISO mode, UID (SNR) is added
after the Response code “00.”
Read data
Indicates data to read from 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
Caution
With regard to the response of polling command (PR), read data will be
preceded by UID (SNR) when SNR (Tag-specific code) addition setting
(refer to 7 SN Command, 5-6-5) is enabled.
With regard to the response of polling write command (PW), end code
“00” in the ISO mode will be followed by UID (SNR) when SNR (Tag-
specific code) addition setting (refer to SN Command, 5-6-5) is enabled.
!
