Balluff BIS U-4A7-082-01C-07-S4 Betriebsanleitung Seite 142

BIS U-4A7-082- _1C-07-S4
Industrial RFID system - Read/write head
8
System integration (continued)
Command identifier 0x57: Lock
The L command can be used to lock memory areas
ock
(access password, kill password, EPC, TID, USER) of a
UHF data carrier against write or read accesses, as well as
any other accesses. Depending on the security level, the
memory areas can only be password-protected or
completely locked.
The m and a fields are used to specify which
aSk ction
memory areas are to receive a new L
this should look like. By using bit masks, the L
several memory areas can be changed at the same time.
To execute the L
correct access password of the data carrier
must be specified beforehand via parameter
0x0085 – subindex 2. Passwords of the
respective data carrier (Access and Kill) are
stored in the Reserved memory area.
Mask and action
m : Bit mask (16 bits) used to define which memory
aSk
areas are to be influenced by the a
status of the EPC, TID and USER memory areas and the
area where passwords are stored can be locked/unlocked
independently.
– 0: Memory area is not affected by the a
– 1: Memory area is influenced by the a
a : Bit mask (16 bits) used to define the L
ction
the memory areas specified by m
Bit 15 14 13
No.
Mask Not used
Action Not used
Bit No. 7 6 5
Mask Access EPC
password
Action Lock- Lock-
Status Status
58 english
status and what
ock
status of
ock
command successfully, the
ock
field. The L
ction ock
field
ction
field
ction
status of
ock
.
aSk
12 11 10 9 8
Kill PW
Status
4 3 2 1 0
TID USER
Lock- Lock-
Status Status
Lock status of the memory areas EPC, TID, USER
The TID memory area is always write-protected
regardless of the lock status and can only be
read.
Status Reading Writing
possible possible
00 Yes Yes
01 Yes Yes
10 Yes With access
password
11 Yes Locked
Lock status for contents of Reserved memory area
(Access PW/Kill PW)
Status Reading Writing
possible possible
00 Yes Yes
01 Yes Yes
10 With access With access
password password
11 Locked Locked
Command:
Subaddress Meaning
0x00 1st bit string
0x01 Command
recognition
0x02 Mask Highbyte
(Bit 15...8)
0x03 Mask Lowbyte
(Bit 7...0)
0x04 Action[0]
0x05 Action[1]
... None
0x1F 2nd bit string
Response:
Subaddress Meaning
0x00 1st bit string
0x01 Status code
... None
0x1F 2nd bit string If the 1st and 2nd bit
Status can be
changed
Yes
No
Yes
No
Status can be
changed
Yes
No
Yes
No
Functional
description
0x57: Lock.
No meaning
If the 1st and 2nd bit
strings match, valid data
is present.
Functional description
Provides information
about the status of a
request.
No meaning
strings match, valid data
is present.