Configuration Tab - 1794-IF4I, -IF4ICF
Use this tab to configure each input channel of your analog input module.
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The 1794-IF4ICF module has three advanced filter settings to define the characteristics of the signal processing. You configure these settings through a bit in the configuration tag using the Tag Editor/Monitor or programmatically. See
Module-defined Data Types (1794-IF4ICF)
.Parameters
Voltage/Current Range
This allows you to configure individual input channels to operate with a specific voltage or current range. There are four data formats in which data is exchanged between the module and the adapter. The data formats correspond to specific voltage/current ranges.
The default value is 4 to 20 mA - Signed Two’s Complement.
Conversion Rate
You can select a rate at which you want to convert data from analog to digital for each channel. Valid choices include: 150 Hz, 300 Hz, 600 Hz, and 1200 Hz (default).
Low Pass Time Constant
You have the capability to specify a frequency to use for input signal noise rejection from the Low Pass Time Constant pull-down menu. This allows you to use input filtering. Valid choices include: None (default), 100 ms, 500 ms, or 1000 ms.
low pass filter
A digital device that provides noise rejection for input signals. This device is programmable and has eight filter frequency options for each channel. A low frequency provides the most noise rejection. A high frequency provides the least noise rejection and a faster step response time.
Real Time Sample
real time sample (RTS)
A programmed interval at which updated information is supplied to the processor. It is a method by which data is gathered, at precise intervals, for use by the processor.
You can select the rate at which the module collects the most recent output of the converter that is later sent off to the adapter. The value is in milliseconds.
The valid range is 0-30000 in 5 ms intervals. The default value is 0 ms.
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If you do not provide a value that is a multiple of 5, an error message is displayed when you click the Apply button.
Interleave Module Interrupts
Check this box to enable Interleave Module Interrupts. Clear the box (default) to disable Interleave Module Interrupts.
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Do not check the Interleave Module Interrupts box unless you know you have a specific use for this option.
The Interleave Module Interrupts feature is useful in limited circumstances and can only be enabled when the module is configured as follows:
- Conversion Rate is set to 1200 Hz
- Low Pass Time Constant is set to None
- Real Time Sampling period to is set to 0 forALLchannels on the module
OK
Click this button to accept your edits on all tabs and close the dialog.
Cancel
Click this button to delete your edits on any tab and close the dialog.
Apply
Click this button to make your edits effective on any tab and continue editing.
If:
- you are online in Program, Remote Program or Remote Run mode and,
- this controller is the owner controller and,controllerA device that controls machines or processes elements (for example, a programmable controller or relay panel).
- you have changed the module’s configuration in the software,
when you click the Apply or the OK button, the information is automatically sent to the controller. The controller tries to send the information to the module (if the connection to the module is not inhibited). If you don’t click the Apply or OK button, your changes are not sent to the controller.
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The connection to a FLEX I/O module using Rack communication cannot be inhibited. The Inhibit checkbox on the Connection tab is disabled in this case.
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