Page 24
Installation
optoNCDT ILR 1183
- Negative hysteresis
With increasing distance, the output switches from HIGH to LOW, as soon as AC +AH/2 is exceeded,
with decreasing distance, it switches from LOW to HIGH, as soon the distance value falls below
AC – AH/2.
AH
HIGH
LOW
AH
HIGH
LOW
Dist.
Dist.
AC
AC
Fig. 10 Digital switching output behavior for positive and negative hysteresis.
- LOW corresponds to a voltage level < 2 V.
- HIGH corresponds to a voltage level of VCC - 2 V
Each switching output is short-circuit proof and rated for a maximum current load of 0.5 A. Parameter settings
for switching outputs can be made with the Profibus master, using the Encoder profile with Class 2 functional-
ity.
The following parameters may be configured (refer to GSD File):
- ExtUserPrmData = 29 “Switching point output 1 (31-16)” for AC switching output 1
- ExtUserPrmData = 30 “Switching point output 1 (15-0)” for AC switching output 1
- ExtUserPrmData = 31 “Switching point output 2 (31-16)” for AC switching output 2
- ExtUserPrmData = 32 “Switching point output 2 (15-0)” for AC switching output 2
- ExtUserPrmData = 33 “Hysteresis output 1 (31-16)” for AH alarm hysteresis 1
- ExtUserPrmData = 34 “Hysteresis output 1 (15-0)” for AH alarm hysteresis 1
- ExtUserPrmData = 35 “Hysteresis output 2 (31-16)” for AH alarm hysteresis 2
- ExtUserPrmData = 36 “Hysteresis output 2 (15-0)” for AH alarm hysteresis 2
Further switching functionalities, for example, monitoring for specified operating ranges may be accom-
plished by combining the two switching outputs.
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