User's Manual
Table Of Contents
- Modbus/TCP Communications
- 7-1 Outline
- 7-2 Message Formats
- 7-3 RF Communications Command Options
- 7-4 Communications Procedure
- 7-5 Commands
- 7-6 V780 Command Details
- 7-6-1 Single-access Communications Commands
- 7-6-2 Multiaccess Communications Commands
- 7-6-3 Modbus Expansion Communications Commands
- 7-6-4 Reader/Writer Control Commands
- 7-6-5 Reader/Writer Setting Commands: Network Settings
- 7-6-6 Reader/Writer Setting Commands: Communications Settings
- 7-6-7 Reader/Writer Setting Commands: Device Settings
- 7-6-8 Maintenance Commands: Device Information
- 7-6-9 Maintenance Commands: Log Information
- 7-6-10 Maintenance Commands: RF Communications Information
7 Modbus/TCP Communications
7 - 90
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Function
This command sets the RSSI filter conditions for the Reader/Writer.
Command Format
Response Formats
• Normal Response
• Error Response
SET RSSI FILTER CONDITIONS
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 000D hex FF hex 10 hex C600 hex 0003 hex
Byte-12 Byte-13 Byte-14 Byte-15 Byte-16 Byte-17 Byte-18
Byte
count
RSSI filter conditions
Enable/disable High threshold Low threshold
06 hex 2 bytes 2 bytes 2 bytes
Parameter Description Default setting
Register address The register address (C600 hex) that specifies the RSSI filter conditions
Word count The number of words in the RSSI filter conditions (0003 hex)
Byte count The number of bytes in the RSSI filter conditions (06 hex)
RSSI filter
conditions
Enable/disable Specify whether the RSSI filter is enabled or disabled in
4-digits hexadecimal.
0000 hex: Disable
0001 hex: Enable
0000 hex
High threshold
*1
*1. When you disable the RSSI filter conditions, set the high and low thresholds to 0000 hex. When you enable
the RSSI filter, set the high threshold value for the reception level to a higher value than the low threshold level.
Otherwise, a command parameter error will occur.
Specify the high threshold for the reception level in signed
4-digit hexadecimal.
FFF6 to FFBA hex (0 or -70 to -10) [dBm]
0000 hex
Low threshold
*1
Specify the low threshold for the reception level in signed
4-digit hexadecimal.
FFF6 to FFBA hex (0 or -70 to -10) [dBm]
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 C600 hex 0003 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