Chapter 4 Communication Protocol
Operating Manual for Communicating Area Sensor
4-12
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Example 7. Beam detection result
Description: The TX/RX beam detection result can be read in measurement/FB/voltage mode.
Reading: 1 represents diagnosis PASS or measurement mode RX beam non-shading;
0 represents diagnosis FAIL or measurement mode RX beam shading.
Example Reading RX beam non-shading/shading state in measurement mode. Assume beams 7 - 22 are
shaded by objects.
Executed action
ASCII
RTU
Reading RX beam state
:010300500004A8
01 03 00 50 00 04 44 18
Response
:010308023F020002C0
021FCE
01 03 08 02 3F 02 00 02 C0 02
1F 9B C3
Numerical value response is as shown below: Where high byte 02H represents measurement mode, low
byte represents beam state
Note: The transmitter/receiver module beam close to the outlet end is the first beam; except for models with
total beam number 128, if models total number of beams is N, normal reading of beam N+1 should be 1.
For beams beyond N+1, normal reading should be 0. In the example above, beam 29 is 1, indicating it is
correct that no beam is detected.
Channel
32—25
24—17
16—9
8—1
Register
address(Hex)
0053
0052
0051
0050
Data(Hex)
021F
02C0
0200
023F
Beam state(bit) 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1
AS-BH028-TX
AS-BH028-CX
1st
28th
