Omega-vehicle-security OMP-MODL Manuel d'utilisateur télécharger pdf (Page 189)

11.. . APPENDIX A: MASTER ICON REFERENCE

USING THE OMP-MODL 11-27

FREQUENCY INPUT ICON (DIGITAL I/O WITH MLIM-2)

FUNCTION:

Event / Counter / Frequency input and Digital output functions are all provided with the

MLIM-2. With the MLIM-2 installed in a OMP-MODL, these respective function icons

become available for use in Program Nets.

The same dialog is used to configure the channel for Event, Frequency, and Counter

functions.

As a FREQUENCY input, the MLIM-2 channel samples the incoming waveform and

outputs the measured frequency to the net.

Calculation of the input signal frequency requires longer for lower frequencies. Due to

this effect, the speed of execution of a Program Net may be reduced when reading low

frequency inputs. (eg 10Hz inputs will require approximately 100mS to read, whereas a

100Hz input will require only 10mS)

NOTE: Due to the advanced signal processing utilized in the frequency mode,

unbalanced duty-cycle inputs are measured with the same accuracy as balanced duty-

cycle inputs.

INPUTS:

Hardware: No signal input shown on Net for Program Net connections.

Update: The measured frequency is output every time an Update command is

received on the Update input.

Enable: Processing of the icon is allowed when Enable pin is unconnected or

connected and the Enable signal is TRUE.

OUTPUTS:

Output Signal: Data type signal, Frequency in Hz.

ICON CONFIGURATION DIALOG BOX:

CONFIGURATION OPTIONS:

Icon Name: Specify the name for the channel. This name will show directly under the

icon within the Program Net. If no name is User provided, the Backplane

Port (1 to 6) and Channel (A to D) where the actual Interface Module

channel is installed will be used for the name.

Output Name: Specify a name for the Output signal from this icon. This Output

Name will be referenced by other icons downstream in the Program Net.

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Omega-vehicle-security OMP-MODL Manuel d'utilisateur Page 189