Operation
Using Inventory command and Continuous (presence sensing) mode
198
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9.4
Using Inventory command and Continuous (presence sensing) mode
The Inventory command and Continuous (presence sensing) mode transfer data to the PLC in
different ways. Continuous mode is suitable for high-speed applications, in which a command
(e.g. read or write) is to be performed repetitively. Repeated execution of the same command
by the controller is unnecessary.
The following lists the most important differences between an Inventory command and Con-
tinuous mode:
Inventory
Continuous mode
Continuous presence sensing
mode
Triggered reading of EPCs
n
Repeated reading of EPCs
n
Automatic repetition of the
same command
(e.g. Inventory, read, write)
n
UHF read/write head
switches on as soon as a tag
is detected
n
Repeated reading of EPCs
n
Automatic repetition of the
same command
(e.g. Inventory, read, write)
Data is displayed in the read
data after the command has
ended.
Data must be read from the
memory of the interface with
a separate command.
Data must be read from the
memory of the interface with
a separate command.
Grouping of EPCs possible
Grouping of EPCs possible
Grouping of EPCs possible
No buffering on the
read/write head
No buffering on the
read/write head
No buffering on the
read/write head
Terminate command:
1. Timeout
2. Automatically after
command execution
Terminate command:
1. Timeout
2. Separate command
Terminate command:
1. Timeout
2. Separate command
Summary of Contents for TN-UHF AUS-CDS Series
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Page 97: ...V02 00 2020 08 97 Transfer the mapping to the POU Fig 94 Transferring the mapping to the POU ...
