Rockwell Automation 1734-8CFGDLX, User Manual

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Publication 1734-UM015A-EN-E - November 2009
64 DeviceLogix Capabilities
Timing Diagnosis
The DeviceLogix Timing Diagnosis function block object determines whether
the occurrence of the expected event is within the preset timing interval.
For more information on the Alarm and Timing Diagnosis function blocks,
refer to the DeviceLogix System User Manual, publication
RA-UM003 .
Filter Category
The Filter category includes a single instruction type: Low Pass Filter.
Low Pass Filter
The DeviceLogix Low Pass Filter (LPF) function block provides a filter to
attenuate input frequency above the cutoff frequency.
The module supports only two instances of the LPF function block.
For more information on the Low Pass Filter function block, refer to the
DeviceLogix System User Manual, publication
RA-UM003 .
Select Limit Category
The Select Limit category includes the following instruction types:
•
Select
•
High Low Limit
Select
The DeviceLogix Select function block identifies one input within the selected
two function block inputs as the output according to the value of the selector.
The Select function block is outlined in detail as follows.
IF Selector = 1
Output = value of Input 2
IF Selector = 0
Output = value of Input 1
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