GeoVision GV-R1352 Card Reader (13.56 MHz) - Manual (Page 29)

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4. Next to Read Mode , select Read UID or Read GID to set the connected readers to read
UID (Unique Identifier) or GID (GeoVision Identifier) on GV-AS ID Cards / Key Fobs.
If you select Read GID , ensure there are two sets of digits on your card / fob as shown
below. If your card / fob only has one set of digits, GID is not supported.
138,08572 14001110
UID GID
140
011
64
138
,08
572
UID
GID
5. Click Submit .
Note:
1. When you click Submit on the Extended Reader page of GV-AS1010 / 210 / 2110 /
2120 / 410 / 4110 / 810 / 8110, GV-AS1620, or GV-CS1320, all readers connected
through RS-485 interface will reboot.
2. GID format is only supported by GV-RK1352 / GV-R1352 / GV-DFR1352 (Rev. B)
V1.2 or later.
3. If you are using third-party cards or key fobs, you must set the reader to read UID.