Sensopart FT 50 RLA 70-L8 Mounting And Operating Instructions page 57

Mounting and
operating instructions
No. LED pattern
Description
23 Locking keys:
Q Q
1 2
I OK
Switch with
C FA
SET
If function is activated locking becomes active once the setting mode has been quit. It is possi-
ble to unlock keys with the functions „factory setting" during power ON or „unlock keys" during
power ON (both described in chapter 7.1, paragraph „Keys and their functions").
24 „Measured value hold" function:
Q Q
1 2
OK
I
Switch with
C FA
SET
If this function is activated, the last valid measured value is saved when no object is in the
measuring range (OK LED = OFF), and is transmitted at the analogue output. 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).
Example of use: Maintaining the position of a machining tool during the change-over of a work
piece.
Illustration: Behaviour of analogique output with and without measured value hold.
INFORMATION
Function 25 to function 27 only for FT 50 RLA version
Simultaneous connection to a PLC control or a PC via the RS485 interface is not possible with
differential measurement.
25 Switch „Differential measurement" (master) mode on / off:
Q Q
1 2
I OK
Switch with
C FA
SET
For description of function see chapter 7.2.3
FT 50 RLA Disctance sensor - GB - 068-13671 - 20.04.2009-05
Status indicator „ZA"
ON, if locking keys active
OFF, if locking keys inactive
ON, if measured value hold active
OFF, if measurement hold inactive
Start of measuring range
End of measuring range
20 mA
4 mA
20 mA
4 mA
ON
Good Target Q
2
OFF
ON, differential measurement mode
master active

OFF, differential measurement mode
master inactive

Factory setting
Inactive
(„ZA" = OFF)
Inactive
(„ZA" = OFF)
With measured value hold
Without measured value hold
Illustr. 19
15500275
S1.
Inactive
(„ZA" = OFF)
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