11... APPENDIX A: MASTER ICON FILE REFERENCE
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.
