8.3.2.1
SCAN UID Mode
An UID is transmitted in each cycle in Scan UID mode. If no transponder is situated in
the detection range, the last read UID is displayed.
The device starts to read out the UID as soon as the mode has been set in the process
data. The “Ready flag” (“Process Data IN”) inverts with every piece of process data.
In addition to the UID, the antenna status, error codes, alarms, RSSI and the entry time
stamp and exit time stamp are transmitted. This mode is set in the factory.
8.3.2.2
(Auto)-read and (Auto)-write
Blocks of the user memory in the transponder can be read and written in these modes.
The addressing of the desired memory range and the desired length of the data are
defined in “Process Data OUT”.
Read/Write:
•
As soon as the command has been set, the device carries out the command one
time.
•
This is for applications in which different ranges of the user memory are read
out/written.
•
If a transponder is located in the field when the command is executed, the device
executes the command directly.
•
If no transponder is located in the field when the command is executed, the device
executes the command when the next transponder enters.
•
A read or write command is triggered manually with the inversion (toggle) of the
“START” bit (“Process Data OUT”).
•
When execution is successful, the “Ready flag” (“Process Data IN”) inverts to the
same status as the “START” bit (“Process Data OUT”).
Auto-read/Auto-write:
•
As soon as the command has been set, the device carries out the command
continuously.
•
This is for applications in which the same range of the user memory is always read
out/written.
•
For Auto-read and Auto-write, the device does not require manual inversion (toggle)
of the “START” bit (“Process Data OUT”).
•
The “Ready flag” (“Process Data IN”) inverts continuously every time a read/write
command is executed.
28 bytes of data are available for reading/writing in all modes.
NOTE
When reading/writing the user memory, note that reading or writing must always be
done in blocks (4 or 8 bytes, depending on the IC used).
8
OPERATION
46
O P E R A T I N G I N S T R U C T I O N S | RFH5xx
8025309//2020-12-08 | SICK
Subject to change without notice
