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7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-4 C
o
mm
un
icatio
ns Pro
cedu
re
7
7-4
-3 RF
T
ag C
ommunications Command Pr
oced
ure for
Single-
a
ccess Co
mmunica-
tions
If you want to check the EPC code or reception level when communications with the RF Tag are suc-
cessful, send a GET RF TAG ADDITIONAL INFORMATION command after the response to the com-
munications command has been received. The reception level from the RF Tag that was just
communicated with will be returned.
With an expanded command, the maximum size of data that you can read from an RF Tag is 2,048
words.
If an error occurs in the RF Tag communications, the error code is returned with the response. No addi-
tional command is required to check the error code.
You can also specify a command option to have the UII (EPC code) or reception level returned with the
other data.
Using an Expanded Command (FC100)
Host device
(client)
Reader/Writer
(server)
RF Tag A
Command
execution
DATA READ communications
command sent.
Communications range
RF Tag memory
read/written.
GET RF TAG ADDITIONAL
INFORMATION command sent.
Reception level
Response returned.
Response returned.
Host device
(client)
Reader/Writer
(server)
RF Tag A
Command
execution
EXPANDED DATA READ
communications command sent.
Communications range
RF Tag memory
read/written.
Error code
+ UII (EPC code) + Reception level
Read data (2,048 words max.)
Response returned
(2,048 words max.)
Summary of Contents for V780 Series
Page 22: ...Version Upgrade Information 20 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 60: ...3 Part Names and Functions 3 14 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 152: ...6 Functions 6 76 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 334: ...8 Browser Interface 8 44 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 358: ...9 Troubleshooting 9 24 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 392: ...Appendices A 30 UHF RFID System V780 series Reader Writer User s Manual Z389 ...
Page 393: ...I 1 I UHF RFID System V780 series Reader Writer User s Manual Z389 Index ...
Page 397: ......