User's Manual

7 - 77
7 Modbus/TCP Communications
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
7-6 V780 Command Details
7
7-6-6 Reader/Writer Setting Commands: Communications Settings
 Function
This command sets the channel in the Reader/Writer.
 Command Format
 Response Formats
• Normal Response
• Error Response
SET CHANNEL
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 0009 hex FF hex 10 hex C200 hex 0001 hex
Byte-12 Byte-13 Byte-14
Byte
count
Channel
02 hex 2 bytes
Parameter Description Default setting
Register address The register address (C200 hex) that specifies the channel
Channel Specify the channel in 4-digit hexadecimal.
0000 hex: Auto
0002 hex: Channel 2
0008 hex: Channel 8
000E hex: Channel 14
0000 hex
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 10 hex C200 hex 0001 hex
Parameter Description
Register address The register address from the command is set.
Word count The word count from the command is set.
Byte-0 Byte-1 Byte-2 Byte-3 Byte-4 Byte-5 Byte-6 Byte-7 Byte-8
Transaction identifier Protocol identifier Field length Unit iden-
tifier
Function
code
Excep-
tion code
X X 0000 hex 0003 hex FF hex 90 hex 1 byte
Parameter Description
Exception code For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.