Omron V780 Series User Manual page 240

7 Modbus/TCP Communications
SET ACCESS PASSWORD
 Function
This command sets the access password for RF Tag communications of the Reader/Writer.
 Command Format
Byte-0 Byte-1
Transaction identi-
fier
X X
Byte-12 Byte-13
Byte Access password
count
04 hex
Parameter
Register address
Access password
 Response Formats
• Normal Response
Byte-0 Byte-1
Transaction identi-
fier
X X
Parameter
Word count
• Error Response
Byte-0 Byte-1
Transaction identifier
X X
Parameter
Exception code
7 - 88
Byte-2 Byte-3 Byte-4 Byte-5
Protocol identifier Field length
0000 hex 000B hex
... Byte-16
4 bytes
The register address (C400 hex) that specifies the access password setting
Specify the access password to use for RF Tag communications in
8-digit hexadecimal.
The specified access password is stored in EEPROM memory in
the Reader/Writer.
If the access password in the RF Tag is not all zeros, the access
password that is stored in EEPROM memory must be used to exe-
cute LOCK, ID WRITE, DATA READ, or DATA WRITE commands.
Byte-2 Byte-3 Byte-4 Byte-5
Protocol identifier Field length
0000 hex 0006 hex
Always 0002 hex.
Byte-2 Byte-3 Byte-4
Protocol identifier Field length
0000 hex 0003 hex
For details, refer to Exception Code on page 7-7 under 7-2-3 Response Format for
Error Completion on page 7-7.
Byte-6 Byte-7 Byte-8
Unit Function Register address
identifier code
FF hex 10 hex
Description
Byte-6 Byte-7 Byte-8
Unit Function Register address
identifier code
FF hex 10 hex
Description
Byte-5 Byte-6 Byte-7
Unit iden- Function
tifier code
FF hex 90 hex
Description
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Byte-9 Byte-10 Byte-11
Word count
C400 hex 0002 hex
Default setting
00000000 hex
Byte-9 Byte-10 Byte-11
Word count
C400 hex 0002 hex
Byte-8
Excep-
tion code
1 byte