> For the complete documentation index, see [llms.txt](https://speedatagroup.gitbook.io/uhf-rfid-users-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://speedatagroup.gitbook.io/uhf-rfid-users-manual/uhf-tag-operation./tag-property-settings..md).

# Tag property settings.

***

### **Lock\&MemBank**

| MemBank          | Reserved | EPC | TID | USER |
| ---------------- | -------- | --- | --- | ---- |
| lock             | √        | √   | x   | √    |
| Unlock           | √        | √   | x   | √    |
| Permanent Lock   | √        | √   | x   | √    |
| Permanent Unlock | √        | √   | x   | √    |

### **Read\&MemBank**

| MemBank              | Reserved lock | Reserved unlock | EPC lock | EPC unlock | TID | User lock | User unlock |
| -------------------- | ------------- | --------------- | -------- | ---------- | --- | --------- | ----------- |
| Have access password | √             | None            | √        | √          | √   | √         | None        |
| No access password   | x             | √               | √        | √          | √   | x         | √           |
| ---                  |               |                 |          |            |     |           |             |

***

### **Write\&MemBank**

| MemBank              | Reserved lock | Reserved unlock | EPC lock | EPC unlock | TID | User lock | User unlock |
| -------------------- | ------------- | --------------- | -------- | ---------- | --- | --------- | ----------- |
| Have access password | √             | None            | √        | None       | x   | √         | None        |
| No access password   | ×             | √               | x        | √          | x   | x         | √           |

### Access password/Kill password

* Access password: When the lock command is used, the access password is required to read and write some MemBanks of the Tag.
* Kill Password:  When the tag is no longer needed, the tag can be completely killed by killing the password.

  > After a tag is killed, it cannot be inventoried or restored.

### Quickly change EPC.

> e.g.：Old\_EPC:E200410062212001142160370B(24word),New\_EPC:12345678(8word)

1. Access password: 00000000(Default).
2. EPC Length(block): 2(Block≤31)
3. New EPC:12345678 (1Block = 2byte = 4word)
4. After confirmation, take inventory again.

{% embed url="<https://youtube.com/shorts/DCR8GkcwsvI?feature=share>" %}

### Lock/Unlock tag

> Lock or unlock any partition needs to first set an access password that is not all 0 (8 hex character).

* Lock: After using the lock command, must use the access password before writing.
* Unlock: In the Unlock flag, no password or default password (00000000) is required to read and write.
* Permanent Lock(can never be unlocked):After setting, the contents of the locked bank cannot be modified, reading is not affected, and it cannot be unlocked.
* Permanent Unlock(can never be locked):After setting, the contents of the unlocked bank can be modified at any time and cannot be locked again.

### Kill tag

> The tag will not be usable after it is killed. <mark style="color:red;">!!! Not recoverable !!!</mark>

Inventory->Select the tag that needs to be killed->tag attribute setting->Set a non-0 Kill password->Click kill tag. (Some versions of the app have not been released)

{% embed url="<https://youtu.be/Lf2hVm1AAyg>" %}
LockUserMemBank
{% endembed %}