20
13
-0
4
30
IUH-F117-V1-*
Operation
The reflections and the resulting inhomogeneity of the field strength depend on
the frequency used. The absolute value of the field strength depends on the
transmission power. Since the tags move in the measurement range of the
read/write head, and the environment can change, it is advisable to repeat the
commands at different transmission frequencies. Different transmission
frequencies are advisable, since the manufacturing tolerances and the immediate
environment of the tag have an effect the tag's resonance frequency.
Read Algorithm
To have the best chance of communicating with tags, the read/write head uses an
algorithm that varies the frequency. You can set the corresponding values for this
algorithm with the parameters Channel Frequency (
CD
), and Number of Attempts
(
TA
) When setting these values, the algorithm automatically selects a suitable
transmission frequency from the available frequencies and performs the specified
number of attempts.
7.3
Command Overview
The commands in the list are described in detail on the following pages.
Read/Write Commands
Configuration Commands
Tip
If analysis of a specific application shows that a particular frequency is sufficient to
execute commands successfully, the parameters can be set accordingly. This
measure reduces the processing time.
Abbre-
viation
Command description
SF
See "Single Read Read-Only Code SF" on page 31
EF
See "Enhanced Read Read-Only Code EF" on page 31
SS
See "Single Read Special Read-Only Code SS" on page 31
ES
See "Enhanced Read Special Read-Only Code ES" on page 32
SP
See "Single Write Special Read-Only Code SP" on page 32
EP
See "Enhanced Write Special Read-Only Code EP" on page 33
SR
See "Single Read Words SR" on page 33
ER
See "Enhanced Read Words ER" on page 34
SW
See "Single Write Words SW" on page 34
EW
See "Enhanced Write Words EW" on page 35
Abbre-
viation
Command description
RP
See "Read Parameters" on page 37
WP
See "Write Parameters" on page 37
