User manual

Publication 1797-6.5.1 - April 1999
Understanding Configurable FLEX Ex Analog Module Features 2-3
High Low Error Level
High Low Error level sets the high and low signal levels at which your input
module will indicate a signal fault. This feature works in conjunction with
the Remote Transmitter Error Up or Down.
If the Remote Fault Alarm feature is enabled and a remote fault occurs, the
module will detect and report the fault, depending on how the High Low
Error level is configured.
Use your programming software to set the high or low error levels.
Input Filter Cutoff
Eight available input filter settings allow you to choose the best rolloff
frequency for input channels on your I/O module. When choosing a filter,
remember that time filter selection affects your input signal’s accuracy.
For example, if you choose the highest frequency of 1200Hz (filter 0),
signal noise is more likely to affect the reading, but the slowest frequency
of 0.5Hz (filter 7) provides the most accurate signal due to incoming
noise filtering.
See Table 2.B to decide which input filter to use in your FLEX Ex
analog I/O application:
Choose the best input filter cutoff in your programming software.
Table 2.B
Input Filter Frequency
Filter:76543210
Frequency: 0.5Hz
(2s)
1Hz
(1s)
2Hz
(500ms)
4Hz
(250ms)
10Hz
(100ms)
20Hz
(50ms)
40Hz
(25ms)
1200Hz
(0.8ms)