![background image](http://html1.mh-extra.com/html/omron/v690-series/v690-series_user-manual_741403031.webp)
3-5
Execute the communication test to check a radio wave environment at a working site.
Data (256 bytes) is communicated 256 times between the antenna and tag and the communication status is output. A total of 128 kbytes
of data is communicated in two ways. So, it takes a few seconds to execute this test. The communication is not retried. Refer to Section
5-7-8.
(1) Create a communication program at a host device.
(2) Enable the operation mode. (Disconnect the terminals "+P" and "-P" from each other. Refer to Section 5-1.)
(3) Turn on the power supply.
(4) Put the tag in front of the antenna.
(5) Send a communication test command (Section 5-7-8). If the antenna is 00, the command is [STX]0080T0SU[ETX].
(6) If the antenna responds to the host device, the communication between the host device and antenna has been made successfully.
(7) In the response [STX]8000T0000256
[ETX], a radio wave environment value
is between 0000 and 0256. If the value is
close to 0000, the communication to the tag is stable.
Example of response from antenna:
* Radio wave environment is good.
[ S T X ] 8 0 0 0 T 0 0 0 0 2 5 6 0 0 0 0 [ E T X ]
Number of
Radio wave
communications environment value
* Radio wave environment is poor or no tag is in communication area.
[ S T X ] 8 0 0 0 T 0 0 0 0 2 5 6 0 2 5 6 [ E T X ]
Number of
Radio wave
communications environment value
Correct Usage
We recommend you to set the radio wave environment value to 50 or less.
3-5 Communication Test