HID Global Corporation 5553 Manuale Utente
1508-USM-00-0-04
HF Multi ISO RFID Reader User Manual, Firmware V1.4
2.3.1.7.6
Multiple tags
This command with parameter 1xh prepares the next multi-select command as a high-speed
select. Any other command will disable the preparation.
select. Any other command will disable the preparation.
2.3.1.7.7
RATS Guard Time SFGT
A high-speed select with parameters 0xh and 1xh automatically waits the SFGT guard time
received from the tag before sending the PPS command.
received from the tag before sending the PPS command.
2.3.1.8
High Speed Select Wait
There are two command variants – ‘hc’ and ‘hw’. If one or more tag(s) are present, return both the
selected UID and in the case of multiple tags, also report that a collision was detected, reducing
the host processing overhead.
selected UID and in the case of multiple tags, also report that a collision was detected, reducing
the host processing overhead.
The ‘hw’ command additionally allows specific Reset off and Reset recovery times to be set,
without altering the Register values, and will search tags for a specified time, further reducing the
host processing overhead.
without altering the Register values, and will search tags for a specified time, further reducing the
host processing overhead.
Command
Command
Data
‘hc’
Option byte
‘hw’
Option byte, Reset Off time, Reset Recovery time, Wait time
Answer
Answer
Description
Data (n bytes) + frame size and
baud rate (1byte) + collision flag
baud rate (1byte) + collision flag
Serial number + frame size used and baud rate [+ collision flag]
'F' Error:
General
failure
‘N’
Error: No tag in field [addressed tag not present or not
responding]
responding]
Note: If the selected tag does not support ISO 14443 part 4, instead of the used frame size/baud
rate byte being returned after the UID, the command will return byte F0h.
rate byte being returned after the UID, the command will return byte F0h.
Examples
Command
Description
hc88
04 91 DF E9 F1 02 80
F0
08
Responding tag doesn’t support ISO14443-4 – hence
FO
– and multiple cards were detected – 08
04 22 0F 14 4B 1C 80
58
Responding tag supports a 64-byte frame size and 848kBaud on the air interface -
58
hc88
04 91 DF E9 F1 02 80
F0
08
Responding tag doesn’t support ISO14443-4 – hence
FO
– and multiple cards were detected – 08
hw88 0A 20 32
04 22 47 14 4B 1C 80
84
Responding tag supports a 256-byte frame size and 424kBaud on the air interface –
84
hw88 0A 20 32
hw88 0A 20 32
‘N’
After a reset/recovery period, the reader searched for tags for 200mS (4 * 32h). None found.
Page 48 of 144
August 2010
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