User's Manual

7 Modbus/TCP Communications
7 - 76
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
 Function
This command is used to check the transmission powers that are set in the Reader/Writer.
 Command Format
 Response Formats
• Normal Response
 Execution Examples
Execution When the Following RF Transmission Powers Are Set in the Reader/Writer
Read transmission power: 27 dBm, Write transmission power: 27dBm
TX: 000000000006FF03C1000002
RX: 000000000007FF0304001B001B
GET TRANSMISSION POWER
Byte-0 Byte-1 Byte-2 Byte-3 Byte-4 Byte-5 Byte-6 Byte-7 Byte-8 Byte-9 Byte-10 Byte-11
Transaction identi-
fier
Protocol identifier Field length Unit
identifier
Function
code
Register address Word count
X X 0000 hex 0006 hex FF hex 03 hex C100 hex 0002 hex
Parameter Description
Register address The register address (C100 hex) that specifies setting the transmission power
Word count The number of words of the antenna setting to read (0002 hex)
Byte-0 Byte-1 Byte-2 Byte-3 Byte-4 Byte-5 Byte-6 Byte-7 Byte-8
Transaction identi-
fier
Protocol identifier Field length Unit
identifier
Function
code
Byte
count
X X 0000 hex 0007 hex FF hex 03 hex 04 hex
Byte-9 Byte-10 Byte-11 Byte-12
Transmission powers
Read transmis-
sion power
Write transmis-
sion power
2 bytes 2 bytes
Parameter Description Default setting
Byte count The number of bytes in the transmission powers (06 hex)
Transmission
power
Read transmis-
sion power
Gives the transmission power for read RF communica-
tions commands in 4-digit hexadecimal.
000F to 001B hex (15 to 27 dBm)
001B hex
(27 [dBm])
Write transmis-
sion power
Gives the transmission power for write RF communica-
tions commands in 4-digit hexadecimal.
000F to 001B hex (15 to 27 dBm)
001B hex
(27 [dBm])