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 - 92
UHF RFID System V780-series Reader/Writer User’s Manual (Z389)
Function
This command is used to check the RSSI filter conditions that are set in the Reader/Writer.
Command Format
Response Formats
• Normal Response
*1. If the RSSI filter conditions are disabled, the high and low threshold levels will always be 0000 hex.
• Error Response
GET 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 0006 hex FF hex 03 hex C600 hex 0003 hex
Parameter Description
Register address The register address (C600 hex) that specifies reading the RSSI filter conditions
Word count The number of words in the RSSI filter conditions to read (0003 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 0009 hex FF hex 03 hex 04 hex
Byte-9 Byte-10 Byte-11 Byte-12 Byte-13 Byte-14
RSSI filter conditions
Enable/disable High threshold Low threshold
2 bytes 2 bytes 2 bytes
Parameter Description Default setting
Byte count The number of bytes in the RSSI filter conditions (06 hex)
RSSI filter
conditions
Enable/dis-
able
Gives whether the RSSI filter is enabled or disabled in 4-dig-
its hexadecimal.
0000 hex: Disable
0001 hex: Enable
0000 hex
High threshold
*1
Gives the RSSI high threshold level in signed 4-digit hexa-
decimal.
FFF6 to FFBA hex (0 or −70 to −10) [dBm]
0000 hex
Low threshold
*1
Gives the RSSI low threshold level in signed 4-digit hexa-
decimal.
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
Transaction identifier Protocol identifier Field length Unit iden-
tifier
Function
code
Excep-
tion code
X X 0000 hex 0003 hex FF hex 83 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.