Specifications

5 - 4 5 - 4
5. THINGS YOU NEED TO KNOW BEFORE PROGRAMMING
(3) Distance level measurement
Distance level measurement allows you to easily verify the installation locations of
the antenna and ID tag.
The test measures the installation distance between the antenna and the ID tag
with respect to the communication area.
Point
(1) The distance level significantly varies according to the effects of the surrounding
environment. Be sure to establish installation location targets, and fully
implement tests in RUN mode in the actual installation environment as well.
(2) Numerical values of distance levels 4 and above are sometimes not shown. This
does not impact RUN mode performance and does not indicate an abnormality.
(3) The number of operation bytes of distance level measurement is 1.
(a) Executing distance level measurement using the mode switch
1) Set the TEST mode operation.
Set the mode switch to "9" and execute power ON or reset.
2) Start distance level measurement.
The measurement results are indicated by the amplifier side LED.
(b) Executing the communication test using a sequence program
1) Set the TEST mode operation.
Set the test operation mode specification area (RWwm+0H) to "00A0H".
2) Start distance level measurement.
When the TEST mode execution request (RYn5) is turned ON, the distance
level is measured, and the measurement results are stored in the processing
result monitor storage area (RWrm+3H).
The measurement result can be verified using the amplifier side LED as well.
Table 5.6 Distance Level Measurement Result
Address Data Format Measurement Result / Error Code
RWrm+3H
Success "A0" + "Measurement result"
00 to 06 [BCD]
(00 when the distance is far)
Failure "E0" + "Error code" 7C: Antenna error