Topic: DMD0472
Module Configuration for BX-04AD-3, BX-08AD-3 Universal Current / Voltage Input Modules
When a Do-more CPU powers up and detects a new BX-04AD-3 or BX-08AD-3 module it will automatically create a module configuration and assign the required I/O mapping using the first 4, or 8 available WX (32-bit signed integer) locations and the first 8 available X (input bit) locations required by the module.
The default configuration has all of the channels enabled in 0 - 5V mode with scaling disabled. Clicking the Edit Config button in the Module Configuration utility will open the following dialog where the default configuration can be changed.
The Analog Inputs 0-3, Analog Inputs 4-7 (if available)tabs set the following options that are specific to the individual channels:
Analog Input # selects the input type: (voltage) 0 - 5V, 0 - 10V, +/- 5V, +/- 10V, (current) 4 - 20mA or +/- 20mA.
Filter time is the amount of time (in seconds) over which to apply the filter. The filter operation applies 63.2% of the difference between the current analog circuit and the last output value to the new output value over the duration of the filter time. Enabling the filter will dampen or slow down the changes in analog circuit to produce a more linear input value. This can be any positive value. A value of 0.0 will disable the filter.
The WX# group shows the range of values, the resolution, and the units / count of the raw input value based on the current Analog Input # selection. The range for bipolar voltage and current selections is -32768 to +32767; the range for unipolar voltage selections is 0 - 32767; the range for the unipolar current selection is 6553 - 32767.
This group also shows the X bit memory location for the Broken Transmitter indication (for the unipolar current selection), and the Out Of Range indication (for voltage ranges and the bipolar current range).
The RX# group (if automatic scaling is enabled for this channel) shows the Real numeric memory location where the scaled value will be stored in the CPU, the range of potential values, and the Units / Count based on the current scale factors.
Enable Scaling from WX# to RX# enables the automatic scaling of the raw input value (32-bit signed integer) to engineering units (32-bit real).
WX# Min / WX# Max the minimum and maximum raw values determined by the Analog Input # selection.
Counts / (mA or VDC) displays the WX#'s Min and Max values in terms of counts or milliamps / volts depending on the Analog Input selection type.
RX# Min / RX# Max contains the minimum and maximum values for the engineering units.
Clamp RX# (if enabled) and the calculated scaled value is lower than RX # Min or higher than RX# Max, the specified Min and Max values will be used.