FISCHER PRO-LINE DE90 Operating Manual page 65

FISCHER Mess- und Regeltechnik GmbH
Risk level
Switching thresholds
5.5.1.5.4 Colour change C1 delay on
BA_EN_DE90
The following colour change red/yellow/green is examined as an example for all
colour changes. There are a total of four switch thresholds (S1...S4) in which a
colour change is realised. This leads to the following image without hysteresis.
RED YELLOW
2
S1
Fig. 88: Colour change (without hysteresis)
Col.ch. C1 hyst.
The parameter
The colour change with hysteresis is then realised as follows:
(i) Lower switching thresholds S1 and S2
In case of a colour change from a higher to a lower risk level, the hysteresis
acts with an increasing signal.
Increasing signal
Fig. 89: Example: Hysteresis S1
(ii) Upper switching thresholds S3 and S4
In case of a colour change from a lower to a higher risk level, the hysteresis
acts with an decreasing signal.
Increasing signal
Fig. 90: Example: Hysteresis S4
Directory: \Configuration\Channel 1\Colour change C1\Col.ch. C1 delay on
Level 4:
Col.ch. C1 delay on
1
Fig. 91: Colour change C1 delay on
The activation delay acts when changing from a lower risk level to a higher risk
level.
Measuring range
GREEN
1 0
S2 S3
defines a distance to the switch threshold.
S1
+ 0.5
S4
-0.5
0
s
Edit OK Cancel
2 3 4
Operation | 5
YELLOW RED
1 2
S4
Falling signal
Falling signal
U
65