Applications; Set Point Monitoring - Endress+Hauser RIA250 Manual De Instrucciones

6. Applications

6.1 Set point monitoring

In a 10 m high silo the height is to be displayed, a low set point
of 1.5 m and a maximum set point of 8.5 m are to be
monitored. The hysteresis, in order to avoid relay hunting
around the set point is, in both cases to be set at 0.25 m. The
minimum set point is also to have a switch time delay of 10 sec.
Example:
Input signal and display:
- Sensor signal 0-20 mA equals 0-10 m
- Numeric display should show 0.00-10.00 (m)
- Bargraph should show 0.00-10.00 (m)
Set point 1:
- Minimum safety
- Switch point 1.50 (m)
- Hysteresis 0.25 (m)
- Time delay 10 s
Set point 2:
- Maximum safety
- Switch point 8.50 (m)
- Hysteresis 0.25 (m)
- Time delay 0 s
Setting up:
Menu group
INPUT
Analogue input
DISPL
Display
Set point/fault monitor
Set point/fault monitor
Address
Input range
Decimal point
Display value 0%
Display value 100%
Scale bargraph/analog. 0%
Scale bargraph/analog. 100%
LIM1
Mode
Set point
Hysteresis
Time delay
LIM2
Mode
Set point
Hysteresis
Time delay
RANG
DI DP
DI LO
DI HI
MODE1
SETP1
HYST1
DELY1
MODE2
SETP2
HYST2
DELY2
Process display
Value
0-20
999,99
0,00
10,00
0,00
BG LO
10,00
BG HI
MIN
1,50
0,25
10
MAX
8,50
0,25
0
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