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Communications Commands and Responses
Section 5-3
5-16
3)
Polling Check (PC)
You can check the results while the Polling Single Autoread Command and Polling Single
Autowrite Command are being executed. You can use Polling Check after the Polling Single
Autoread Command and Polling Single Autowrite Command have been sent.
Command frame structure
STX
Node No. Command
code
“PC”
ETX BCC
1
2
2
1
1
Response Frame Structure
·
Response to Read commands
STX
Node No.
Retry
flag
Command
code
“PR”
Response
code
“00”
Read data
ETX BCC
1
2
1
2
2
Specified
number
1
1
·
Response to Write commands
STX
Node No.
Retry
flag
Command
code
“PW”
Response
code
“00”
ETX BCC
1
2
1
2
2
1
1
·
Response when a Tag is not yet detected
This response is returned when the Polling Check Command is received before a Tag is detected.
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: Before the completion of communications with the Tag
For other response codes, refer to 5-10 Response Code List.
Read data
Indicates the data having been read. The number of characters of the data is as
follows:
ASCII code: No. of read pages x 4
HEX code: No. of read pages x 8