Omega-vehicle-security OMP-MODL Manuel d'utilisateur télécharger pdf (Page 187)

11.. . APPENDIX A: MASTER ICON REFERENCE

USING THE OMP-MODL 11-25

COUNTER 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 four input channels for Event, Frequency, and

Counter functions.

As a COUNTER input, the MLIM-2 channel accumulates counts from a User connected

hardware signal input, then outputs the count to the net when it receives an Update

command. When the count is output, the counter is automatically set back to 0 and

counting resumes.

The MLIM-2 Counter can count pulses received at input rates up to apx 20 Khz. However,

at higher frequencies, the net must be configured to read the counter before it overflows

or the counter will overflow and return to 0 and continue incrementing.

INPUTS:

Hardware: No signal input shown on Net for Program Net connections. The MLIM-2

Counter function increments its count on received rising or falling edges of

the input signal.

Update: The accumulated count is output every time an Update command is

received on the Update input. To preclude the loss of data, this Update

command (from a connected Sample Rate Clock ) should be received

before the icon counts to 16,777,216 or the counter will roll-over to 0 and

continue counting, resulting in lost counts.

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 (ie Count totals)

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

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Omega-vehicle-security OMP-MODL Manuel d'utilisateur Page 187