Inventories Limited By Time - Siemens SIMATIC RF650R Configuration Manual

Note: The algorithm "Read/Write Power Ramp" is based on the algorithm "Inventory Power
Ramp". This means that the dB values of the "Read/Write Power Ramp" are added to the
existing values increased by the "Inventory Power Ramp".
A.2.2

Inventories limited by time

Description
In this example inventories will be taken as soon as an event occurs - e.g. when a forklift
truck passes and interrupts a light barrier (input 1). The aim is that all transponders on the
palette of the forklift truck are reported as ""reliably identified" if they are scanned often
enough.
In this example there are different procedures depending on the user type (S7/Rockwell user
or XML/OPC user).
In addition, there are two different examples (A and B) in which a distinction is made as to
when the inventories are ended again.
● Example A:
The inventories are taken over a specified time of 10 seconds.
● Example B:
The inventories are taken until the light barrier is no longer interrupted.
Algorithms used
● Smoothing
Requirement
The read points are mounted, equipped and aligned.
Parameter assignment - S7 / Rockwell user
Follow the steps below to activate the "Smoothing" algorithm:
1. In the menu item "Settings - Read points" in the "Algorithms" area activate the
"Smoothing" algorithm and specify the values as follows:
– Observed Count: Here enter a value that guarantees reliable identification of the
– Lost Count: Enter the maximum value "65535" to ensure that all transponders are
SIMATIC RF650R/RF680R/RF685R
Configuration Manual, 03/2018, C79000-G8976-C386-06
transponders and at the same time ensures that transponders identified by sporadic
overshoots are sorted out. With the menu item "Diagnostics - Tag monitor" you can
determine which value is ideal here for your application.
identified during the specified period (status: observed). With this value you ensure
that the identified transponders are reported as "identified" over the entire time of the
inventory, even if the transponders have already left the antenna field.
A.2 Application examples of the algorithms
Appendix
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