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 positions 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.
The measurement results are stored in the processing result monitor storage area
(Un
\
G42, Un
\
G4042). The measurement results can also be verified using the
amplifier operation indicator lamps.
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 distance level is measured using the contents set in advance in buffer
memory (Un
\
G8000 to Un
\
G8002) (Refer to Section 3.4.2(14) to (16)).
1. Set the RUN/TEST mode switching method.
• When you want TEST mode to be started using the test switch only, set bit 0 of
intelligent function module switch 2 to “1”.
• When you want to start TEST mode using the test mode execution request
(Y15), set bit 0 of intelligent function module switch 2 to “0”.
2. Set TEST mode operation.
Set “00A0
H
” in the test operation mode specification area (Un
\
G8000), the test
operation antenna number in the test operation antenna specification area
(Un
\
G8001), and the number of test operation bytes in the number of processed
points during testing specification area (Un
\
G8002).
3. Execute TEST mode.
The communication test is started based on the buffer memory (Un
\
G8000 to
Un
\
G8002) setting conditions.
• When bit 0 of intelligent function module switch 2 is set to “1”, start TEST mode
by switching the test switch to “TEST”.
• When bit 0 of intelligent function module switch 2 is set to “0”, start TEST mode
by the above method or by turning the test mode execution request (Y15) ON
in RUN mode.
4. Start distance level measurement.
The distance level is measured, and the measurement result is stored in the
processing result monitor storage area (Un
\
G42, Un
\
G4042).
The measurement result can also be verified using the amplifier operation
indicator lamps.
Table 5.3 Distance Level Measurement Results
Address
Data Format
Measurement Result / Error Code
CH1 CH2
Un
\
G42 Un
\
G4042
During operation
“A0” + “Measurement result”
00 to 06[BCD]
When abnormal
“E0” + “Error code”
7C: Antenna error
