X20 system modules • Analog input modules • X20AI2438
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X20 system User's Manual 3.10
4.3.7.9.6.3 AnalogStatus
Names (pChannelName):
AnalogStatus01
AnalogStatus02
The current error status of the module channels is displayed in this register, regardless of the configured replace-
ment value strategy. Some error information may be delayed according to the previously configured condition.
Data type
Values
USINT
See bit structure
Bit structure:
Bit
Name
Information
0
No error
0
Underflow
1
Underflow on Channel 0x
0
No error
1
Overflow
1
Overflow on Channel 0x
0
No error
2
Open line
1
Open line on Channel 0x
0
No error
3
Conversion error
1
Conversion error on Channel 0x
0
No error
4
Composite error
1
Composite error on Channel 0x
5
Reserved
-
0
No error
6
Sensor error
1
Sensor error on Channel 0x
0
No error
7
I/O supply error
1
I/O supply error on Channel 0x
Data points from AnalogStatus:
Designation (pChannelName)
Information
0
No error
UnderflowAnalogInput01
UnderflowAnalogInput02
1
Underflow on Channel 0x
0
No error
OverflowAnalogInput01
OverflowAnalogInput02
1
Overflow on Channel 0x
0
No error
OpenLineAnalogInput01
OpenLineAnalogInput02
1
Open line on Channel 0x
0
No error
ConversionErrorAnalogInput01
ConversionErrorAnalogInput02
1
Conversion error on Channel 0x
0
No error
SumErrorAnalogInput01
SumErrorAnalogInput02
1
Composite error on Channel 0x
0
No error
SensorErrorAnalogInput01
SensorErrorAnalogInput02
1
Sensor error on Channel 0x
0
No error
IoSuppErrorAnalogInput01
IoSuppErrorAnalogInput02
1
I/O supply error on Channel 0x
Underflow:
The signal underflow error status is indicated here according to the configuration. This error information is activated
as a multiple of the conversion cycles only after the configurable delay time has passed ("ErrorDelay" registers).
Overflow:
The signal overflow error status is indicated here according to the configuration. This error information is activated
as a multiple of the conversion cycles only after the configurable delay time has passed ("ErrorDelay" registers).
Open line:
According to the configuration, measurement information is checked for values <2 mA ("OpenLoopLimit" register)
to detect a failure signal. Open line detection takes place using a configurable hysteresis value (default: 100 µA,
"Hysteresis" registers). It is possible to disable open line detection ("AnalogMode" registers) to suppress alarms
when hardware is not present. This error information is activated as a multiple of the conversion cycles only after
the configurable delay time has passed ("ErrorDelay" registers).
Conversion error:
This error status is triggered when the hardware exceeds the conversion time.
Composite error:
This error information derives from the status of individual errors and is only activated after the configurable delay
time has passed ([msec], "SumErrorDelay" registers). Linking this error information to an application makes it
possible to hide temporary temperature value overflows and underflows, for example.
Sensor error:
This error is activated immediately after a fault is detected in the internal sensor supply.
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