Omron V780 Series User Manual page 182

7 Modbus/TCP Communications
LOCK
 Function
This command locks or unlocks the memory of the RF Tag in the communications range.
 Command Format
Byte-0 Byte-1
Transaction identi-
fier
X X
Byte-12 Byte-13
Byte Lock operation
count
08 hex 2 bytes
Parameter
Lock operation
Area to
lock/unlock
Password
Note 1. When an area is locked, the specified password is written to the access password area in the RF Tag.
2. If an address error, lock error, or RF Tag system error occurs when locking an area, the access pass-
word area in the RF Tag will be cleared to all zeros.
3. When an RF Tag is unlocked, the access password area in the RF Tag will be cleared to all zeros.
 Response Formats
• Normal Response
Byte-0 Byte-1
Transaction identi-
fier
X X
Parameter
Register address
Word count
7 - 30
Byte-2 Byte-3 Byte-4
Protocol identifier Field length
0000 hex 000F hex
Byte-14 Byte-15 Byte-16
Area to lock/unlock
2 bytes
Specify locking or unlocking.
0000 hex: Unlock
0001 hex: Lock
• If you specify locking the UII (EPC), TID, or user area, you will no longer be able to write
data to that area.
• If you specify locking the access password, you will no longer be able to read the access
password area.
• When you unlock an area, specify all of the areas that have been locked.
Specify one or more of the UII (EPC), TID, and user areas.
UII (EPC) area: 0001 hex
TID area: 0002 hex
User area: 0004 hex
Access password: 0008 hex
• If all zeros is specified, a command parameter error will occur.
Specify the access password to set in the Tag in 8-digit hexadecimal (32 bits) (00000000 hex).
Locking: The access password to set in the RF Tag to lock.
Unlocking: The access password in the RF Tag to unlock.
Byte-2 Byte-3 Byte-4
Protocol identifier Field length
0000 hex 0006 hex
The register address from the command is set
The word count from the command is set.
Byte-5 Byte-6 Byte-7
Unit Function
identifier code
FF hex 10 hex
Byte-17 ... Byte-20
Password
4 bytes
Description
Byte-5 Byte-6 Byte-7
Unit Function
identifier code
FF hex 10 hex
Description
UHF RFID System V780-series Reader/Writer User's Manual (Z389)
Byte-8 Byte-9 Byte-10 Byte-11
Register address Word count
8000F hex 0004 hex
Byte-8 Byte-9 Byte-10 Byte-11
Register address Word count
2 bytes 2 bytes