User's Manual

30
Section 3 ID Controller
RFID System
User's Manual
Section 3
Functions and Operation
Noise Measurement
You can check whether noise that affects communications with ID Tags exists in the area where the
Antenna and ID Controller are installed.
When a noise measurement command is sent from the PLC, the noise strength received by the
Antenna is output in a value from 00 to 99.
The measured noise strength is also displayed in four levels on the data indicators, and so it can be
checked directly on the DeviceNet Remote ID Controller.
Refer to NOISE MEASUREMENT for details of the noise measurement command.
p.58
 Relation between Result Output and Data Indicators
 Example of Results Output and Influence on Communications Distance
Figure
Result output Data indicator status Result output Data indicator status
00 to 09 10 to 19
20 to 29 30 to 39
40 to 99
7654
3210
7654
3210
7654
3210
7654
3210
7654
3210
: OFF : ON