Omega-vehicle-security OMP-MODL Manuel d'utilisateur télécharger pdf (Page 258)

11.. . APPENDIX A: MASTER ICON FILE REFERENCE

USING THE OMP-MODL11-96

Memory: Three selections are available for utilization of the OMP-MODL memory:

Log to Full Memory and STOP Processing - if selected, the OMP-MODL

will log data until memory is filled, then stop execution of the Program Net

and go into a low power sleep mode.

NOTE: If MILLISECOND Sample Clock Resolution is selected (see below)

logging sessions must be limited to a maximum length of 40 days.

Log to Full Memory and CONTINUE Processing - if selected, the OMP-

MODL will log data until memory is filled, then continue the execution of

the Program Net excluding the storage of data to memory. This mode

allows all of the non-Memory icons in the Program Net to continue

operation providing continued Alarm, Probe Point, etc access.

NOTE: If MILLISECOND Sample Clock Resolution is selected (see below)

memory must be filled before a maximum of 40 days after Enabling the

OMP-MODL . Processing will continue after the 40 day limitation.

Rotary Memory - if selected, the OMP-MODL will log data until the

memory is filled, then begin overwriting the oldest sample in memory.

Processing of the complete Program Net will continue as normal.

NOTE: If MILLISECOND Sample Clock Resolution is selected (see below)

logging sessions must be limited to a maximum length of 40 days.

Sample Clock Resolution: Two options are available for selecting the time

resolution of the OMP-MODL.

SECONDS - This mode should be used for all Program Nets that have

Sample Rate Clocks set at 1 second or slower. In this mode, the OMP-

MODL `sleeps’ in a low-power mode during times of inactivity, providing

extended battery life. Sample Rate Clocks can be set as fast as 1 second.

MILLISECONDS - This mode must be used if any Sample Rate Clocks will

be set at faster than 1 second rates. In this mode, the OMP-MODL can

resolve time increments as small as 1/1000 of a second. NOTE: Use of the

millisecond mode will result in higher power consumption as the OMP-

MODL microprocessor is continually operating. Depending on the Program

Net, the energy consumption in this mode may be approximately 10 to 15

times higher than in the SECOND mode.

NOTE: In MILLISECOND Mode, logging sessions must be

limited to a maximum length of 40 days. This limitation

holds for both Rotary and Log to Full Memory modes.

This 40 day limit is due to a maximum time count that the

OMP-MODL can internally store at the faster clock rate.

For sessions longer than 40 days, utilize the SECOND

mode.

Recalibration Period: The OMP-MODL performs various self-calibrations during

execution of a Program Net. The User can specify the frequency of these

calibrations. If a 0 is entered for the period, a recalibration will be

performed at the start of each Program Net execution. If speed is not of

concern, entering 0 for each of the recalibration periods will result in

optimum performance.

ADC - the analog to digital converter used within the OMP-MODL and

much of the analog circuitry incorporated into Interface Modules can drift

over time and temperature fluctuations. By performing a recalibration,

most of this drift can be nulled. Specify the period in seconds between

recalibrations.

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Omega-vehicle-security OMP-MODL Manuel d'utilisateur Page 258

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