X20 system modules • Analog input modules • X20AI2438
X20 system User's Manual 3.10
211
4.3.7.9.7.6 UpperLimit, LowerLimit
Names (pChannelName):
UpperLimit_1
UpperLimit_2
LowerLimit_1
LowerLimit_2
If the value range needs to be restricted further, the "UpperLimit" and "LowerLimit registers can be used to enter
new user-specific limit values.
Data type
Values
INT
-32767…32767
UINT
0...65535
The limit value must be set for the respective analog input depending on the configured normalization. After the
configured delay time has passed, the corresponding error status is given if the respective value is overrun or
underrun. When this error status occurs, the "AnalogInputEvaluated0x" channel is evaluated according to the
replacement value strategy. Using a default value of 21000 µA and 3600 µA, the following values and formulas
apply to this parameter:
UpperLimit
•
Displaying 0..25 mA as 0..25000 : 21000
•
Displaying 0..25 mA as 0..32767 : 27524, limit value = ([µA]*32767)/25000
•
Displaying 4..20 mA as 0..32767 : 32767, limit value = (([µA]*1.31068) - 5242.72)*1.5625
•
Displaying 0..25 mA as 0..65535 : 55049, limit value = ([µA]*65535)/25000
LowerLimit
•
Displaying 0..25 mA as 0..25000 : 3600
•
Displaying 0..25 mA as 0..32767 : 4718, limit value = ([µA]*32767)/25000
•
Displaying 4..20 mA as 0..32767 : -819, limit value = (([µA]*1.31068) - 5242.72)*1.5625
•
Displaying 0..25 mA as 0..65535 : 9437, limit value = ([µA]*65535)/25000
Summary of Contents for X20 System
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