Reference Information - Omron V680 Series User 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 Slave 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 63 hex.
The measured noise strength is also displayed in five levels on the data indicators, and so it can be
checked directly on the ID Slave.
Refer to NOISE MEASUREMENT for details of the noise measurement command.
p.65
Relation between Result Output and Data Indicators
Result output
00 to 09
10 to 19
20 to 29
Influence of Noise on Result Output and Communications Distance

(Reference Information)

The values given for the influence of the noise level obtained from noise measurement and the communications
distance are for reference only. The results depend on the type of Antenna and ID Tag used, and differences in the
noise environment. Be sure to check carefully when installing the system.
Measurement Conditions
Antenna
ID Tag
Command
RFID System
30
User's Manual
Data indicator status
7 6
3 2
7 6
3 2
7 6
3 2
100%
80%
60%
40%
20%
0%
0
: V680-HS63
: V680-D1KP66T(non-metallic mounting)
4-byte write
Result output
5 4
30 to 39
1 0
5 4
40 to 99
1 0
5 4
Note: Result output is a decimal conversion
value.
: OFF
1 0
10 20 30 40 50
Noise level
Data indicator status
7 6 5
3 2 1
7 6 5
3 2 1
: ON
70
60
4
0
4
0