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No. Action
Picture
follows
26 Switch differential thickness measurement mode (slave) on / off:
Q
Q
1
OK
I
C
FA
push
25x
27 Switch parallel differential measurement mode (slave) on / off
Q
Q
1
I
OK
C
FA
push
26x
7.2.3
Differential measurement mode
INFORMATION
Only FT 50 RLA sensors with the same measuring range (type FT 50 RLA-70, -100, or -220) and
serial interface (version S1) can be used for differential measurement.
Simultaneous connection to PLC control or a PC via the RS485 interface is not possible with
differential measurement.
With this measuring procedure, two FT 50 RLA-S1 sensors are connected to one another. The sensors are positi-
oned opposite each other (differential thickness measurement, function no. 26) or are aligned parallel to one another
(parallel differential measurement, function no. 27). With differential thickness measurement, the measuring ranges
can overlap (1), be directly adjacent (2) or apart (3) (illustr. 20).
If a sensor is set as master or slave, communication with the PC is not possible.
1
2
3
A. The following steps must be carried out for differential measurement:
INFORMATION
We recommend resetting sensors to factory setting (function 22, or 7.2.2) before configuration of
sensors as master or slave.
When using two sensors, measuring errors (resolution, response time, non-linearity, etc.) have to
be multiplied by factor 2 with differential thickness measurement.
58
Action
Reaction / Status indicator „ZA" (red)
Switch with
ON, differential thickness measurement mode
2
slave active
SET
OFF, differential thickness measurement mode
slave inactive
Description of function - sensors positioned opposite each other (see chapter 7.2.3).
Switch with
ON, parallel differential measurement mode
2
slave active
SET
OFF, parallel differential measurement mode
slave inactive
Description of function - sensors positioned parallel (see chapter 7.2.3)
Measuring range
FT 50 RLA Disctance sensor - GB - 068-13671 - 19.05.2016-12
Mounting and
operating instructions
Factory setting
Inactive
(„ZA" = OFF)
(„ZA" = OFF)
Illustr. 20
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