1756-RMS-SC Channel Configuration
Use the Configuration tab on the Module Properties dialog box to define all aspects of add-on profile configuration on a per-channel basis for the 1756-RMS-SC module.
Use the Configuration tab to:
- Select the channel to configure
- Enable or disable the channel
- Enter the Voltage RMS/Current RMS range type.
- Specify the scaling value
- Specify high and low alarm values
- Select the line frequency
- Specify the phase correction
- Specify the filter constant to use
- Enable or disable the alarm latch
- Enable or disable user calibration
Tip
: The module’s configuration information is stored in the controller and the controller configures the module.Disable Channel
Turns channel off. Click to disable channel.
Voltage RMS/Current RMS
Specifies which VRMS range to use.
Default setting is 5.0 VRMS.
Choose one of the following:
- 0.5. VRMS. Values are:
- 0.707 full scale RMS
- 1 V full scale peak
- 1.0. VRMS. Values are:
- 1.414 full scale RMS
- 2.0 V full scale peak
- 2.5. VRMS. Values are:
- 3.535 full scale RMS
- 5 V full scale peak
- 5.0. VRMS. Values are:
- 7.070 full scale RMS
- 10 V full scale peak
Scaling
This value is the actual value of the system based on the range setting. Default setting is 5.0 VRMS. Example: For a Scaling value of 120 and a range set to 5 VRMS, an input signal of 5 VRMS represents 120 VRMS from the system.
Alarm (For Voltage or Current RMS.)
Specify values at which to trigger the alarm.
- High Signal. Specify high value at which to trigger an alarm. Scaled VRMS measurements greater than or equal to this setting will trigger the High alarm.
- Low Signal. Specify a low value at which to trigger an alarm. Scaled VRMS measurements less than or equal to this setting will trigger the Low alarm.
Line Frequency.
Specifies whether to use 50 Hz or 60 Hz line frequency.
Phase Correction.
When using current transformers, specifies phase angle correction in degrees. To disable, enter zero (0). The range of values is determined by the Line Frequency setting.
- With a line frequency of 50 Hz, possible range is ±7.5°.
- With a line frequency of 60 Hz, the range is ±-9.0°.
Values outside of the above stated ranges will cause a configuration error.
Filter Constant.
Constant used in digital filter. Units are in milliseconds. To disable, enter zero (0). Maximum value is 20100 (20.1 seconds). The value represents the number of milliseconds it takes the measurement to reach 63% of a step change at the input.
Enable Alarm Latch.
Specifies whether to turn on alarm latching. Default is off. When enabled, an alarm will remain set even when the condition is cleared. To clear a latched alarm, toggle the corresponding “unlatch bit” in the output table.
Enable User Calibration.
Turns on capability for you to enter a manual calibration for the module. Default is off. If enabled, your manually entered calibration information is taken from the Output table for the selected channel. To remove your calibration information, disable the user calibration option, and reconfigure the module.
OK
Click this button to accept your edits on any tab and close the dialog.
Cancel
Click this button to cancel your edits on any tab and close the dialog.
Apply
Click this button to apply your edits 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,
- 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 module’s connection is not inhibited). If you don’t click Apply, your changes are not sent to the controller.
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