Installation Manual Part 2

Installation manual Reader 54
Modications, misprints and errors excepted.
English
6.3.2. Synchronous mode
6.3.3. Asynchronous mode
This mode is intended for applications when the requirements for timing are not so demanding. This mode allows
the facility to switch the carrier off during the idle times, thus saving power.
The inventory of the tags (the read process) is performed across all the antennas that are congured. Once all
tags in the eld have been read on the last antenna, data are sent to the PC. The inventory of the tags is then
automatically retriggered by the PC.
The Pause after reading option species how many milliseconds the pause between two inventories should be. During
this waiting time the carrier can be deactivated. See section ((B)) „congurational manual reader“ for more information
about switching off the carrier.
In order to keep the time between inventories as short as possible in synchronous mode, data transmission between
the inventories can be dispensed with. That means that the reader saves all the tags that it nds in the eld in
its internal RAM. After a congurable time this results list is sent to the PC. This time is given in milliseconds by
the Bulk read parameter.
The current reading performance is displayed under the item Tags per second.
Note
The read rate is inuenced by many parameters; these include in addition to the selected broadcasting prole
with the respective data rates also application-specic data such as how many tags the reader should expect
in the eld. You can optimise these parameters using the expert settings 1 and 2. There is more about this in
the following sections. If you are unsure whether the settings you have chosen are optimum for your application,
please contact KATHREIN Support.
If the tags that have been read are to be saved to a le, this can be done by activating the Save to le option. The
EPC, the length of the EPC, the antenna on which the tag was read, the RSSI valuetogether with the time stamp when
the tag was read are saved.
The data are then saved in a csv le in the Program directory. In the File menu, you can “change to the log le
File / Options / Path” under the location of the CSV le. The le can opened or deleted in the context menu
for this item.
This mode is intended for applications for which maximum performance is required.
The reader starts the inventory as quickly as possible, and at the end of an inventory it does not deliver every tag
that was read to the PC, but only those that had newly appeared in the eld or newly left it. This allows the time
required for communication with the higher level to be minimised.
The timing of when a tag was reliably read in the eld and when the tag no longer appears in the eld can be
dened more precisely using parameters. Details of these ObservedThresholdCnt and ObservedTimeoutCnt
parameters can be found in section ((B)) „congurational manual reader“.
Note
The read rate is inuenced by many parameters; these include in addition to the selected broadcasting prole
with the respective data rates also application-specic data such as how many tags the reader should expect in
the eld. You can optimise these parameters using the expert settings 1 and 2. There is more about this in
the following sections. If you are unsure whether the settings you have chosen are optimum for your application,
please contact KATHREIN Support.
If the tags that have been read are to be saved to a le, this can be done by activating the Save to le
option. The data are then saved in a csv le in the Program directory. The le can opened or deleted
in the context menu for this item.
Once the mode and the parameters have been selected, the read process can be started. Both modes are stopped
by pressing the Stop button. The Delete button removes all tag entries from the table.
6. Operating the reader