20
I/O Channel Properties
Channel
Each channel may be configured as a Float input or Disabled. If "Float" is selected, the channel
returns a floating-point voltage.
If "Disabled" is selected, the channel is disabled. You can disable any unused channel to avoid
scanning unconnected inputs.
If “Integer” is selected, the channel is “Disabled”.
I/O Tag
Each Float input channel is accessed by a Float Variable object. NetArrays assigns a Tag to
each channel when the card is added to the I/O configuration. Reconfigure the I/O Tag as
required to match the Module Form Variable object that is used to access the channel input.
Note!
All unused un-terminated I/O points must be disabled in IO Configuration.
Filter
If required, a triple-cascaded recursive filter is available for each channel. A filter weight must be
assigned to enable the filter for the channel. Enter a weight factor of 10 through 2000. The
filtering effect increases as the weight value increases. The filtering for each cascade can be
expressed as:
Where:
Xn is the input to the filter
Yn is the output from the filter
Yn-1 is a weighted portion of the previous output
Selecting a filter paramete
r of “None” disables recursive filtering of the channel’s input.
Threshold
If the threshold value is exceeded, the filter will reset to the new input value. The units are in mV
if the inputs are configured in Float.
SOE Low
T
he SOE Low parameter specifies the low SOE trip point for the channel’s input. If the input falls
below this value, an SOE event record is stored in a special buffer within the Chassis Processor.
These records may then be logged by the RTPADA utility in an archival file. If both the SOE Low
and SOE High parameters are set to 0.0, SOE processing is disabled for the channel. The
RTP3000M and RTP3100M do not provide SOE.
