B&R Industries X20 System, User Manual

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X20 system modules • Analog input modules • X20AI2222
150 X20 system User's Manual 3.10
Example 2
A disturbance interferes with the input value. The diagram shows the calculated value with the following settings:
Input ramp limitation = 0
Filter level = 2 or 4
0
8000
16000
t [ms] 1 2 3 4 5 6 7 8
Input value
Calculated value: Filter level 2
Calculated value: Filter level 4
Disturbance (spike)
Figure 59: Calculated value during disturbance
4.3.3.8.6 Configuring the input filter
Name:
ConfigOutput01
This register is used to define the filter level and input ramp limitation of the input filter.
Data type Value
USINT See bit structure.
Bit structure:
Bit Description Value Information
000 Filter switched off
001 Filter level 2
010 Filter level 4
011 Filter level 8
100 Filter level 16
101 Filter level 32
110 Filter level 64
0 - 2 Defines the filter level
111 Filter level 128
3 Reserved 0
000 The input value is used without limitation
001 Limit value = 0x3FFF (16383)
010 Limit value = 0x1FFF (8191)
011 Limit value = 0x0FFF (4095)
100 Limit value = 0x07FF (2047)
101 Limit value = 0x03FF (1023)
110 Limit value = 0x01FF (511)
4 - 6 Defines the input ramp limitation
111 Limit value = 0x00FF (255)
7 Reserved 0
4.3.3.8.7 Lower limit value
Name:
ConfigOutput03
This register can be used to configure the lower limit for analog values. If the analog value goes below the limit
value, it is frozen at this value and the corresponding error status bit is set.
Data type Value
INT -32,768 to 32,767
Information:
The default value of -32768 corresponds to the minimum default value of -10 VDC.
Keep in mind that this setting applies to all channels!