
FT 50 RLA Disctance sensor - GB - 068-13671 - 20.04.2009-05
Mounting and
operating instructions
77
Example telegram
(in the example, the sensor has the address 1)
Master telegram
Sensor’s reply telegram
Designation
Decimal
Hex.:
Designation
Decimal
Hex.:
1. Byte
Address
129
81
1. Byte
Address
129
81
2. Byte
Length
4
04
2. Byte
Length
21
15
3. Byte
Command
63
3F
3. Byte
Reply
89
59
4. Byte
Check sum
58
3A
4. Byte
Function 1
32
20
5. Byte
1
01
6. Byte
Function 2
48
30
7. Byte
48
30
8. Byte
Function 3
55
37
9. Byte
1
01
10. Byte
Characteristic
curve 4 mA point
0
00
11. Byte
0
00
12. Byte
Characteristic
curve 20 mA point
63
3F
13. Byte
63
3F
14. Byte
Switching thres-
hold Q
1
0
00
15. Byte
0
00
16. Byte
Scanning zone Q
1
0
00
17. Byte
0
00
18. Byte
Switching thres-
hold Q
2
0
00
19. Byte
63
3F
20. Byte
Scanning zone Q
2
63
3F
21. Byte
63
3F
21. Byte
Check sum
101
65
8.5.23 „Meas. value hold” function
Command (Byte 3):
decimal 82; hexadecimal 0x52
Parameter format
Parameter:
D0 = 0: Measuring value Hold off
D0 = 1: Measuring value Hold
7 bit data byte
Reply (Byte 3):
decimal 89; hexadecimal 0x59
Parameter:
no
If this function is activated, the last valid measured value is transmitted at the analogue output when no object is in
the measuring range (OK LED = OFF), . The switching output also maintains its status (if set).
The current value is only displayed again when an object is within the measuring range (OK LED = ON).