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5-4 Communication protocol for serial output
Bit signal vs. beam status is:
0 = BEAM NOT INTERUPTED
1 = BEAM INTERRUPTED
FBB + NBB
Dip switch setting:
The reply received from the light curtain is composed of 4 bytes.
The first two bytes are related to FBB data
The second two bytes are related to NBB.
FBB data is the binary conversion of the FBB id number.
NBB data is the binary conversion of the NBB number.
5
Example of the response protocol of a light curtain with 9 beams and FBB + NBB settings:
FBB
NBB
FBM + NAB
Dip switch setting:
The reply received from the light curtain is composed of 4 bytes.
The first two bytes are related to FBM data
The second two bytes are related to NAB.
FBM data is the binary conversion of the FBM id number.
NAB data is the binary conversion of the NAB number.
The order of bytes in the protocol is same as example described for FBB + NBB setting.
5-6
6
7
8
OFF
OFF
ON
1
9
6
7
8
OFF
ON
OFF
F3EM2 MEASURING LIGHT CURTAINS OPERATION MANUAL
Type of function
FBB + NBB
FBB = 4, NBB = 4 (HEX FORMAT)
st
1
byte H
0
0
FBB
nd
2
byte L
0
0
FBB
rd
3
byte H
0
0
NBB
th
4
byte L
0
0
NBB
H =
high order byte
L =
low order byte
Type of function
FBM + NAB
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
0
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