Anderson Manufacturing AV-9000 Trend Data Collect Actuator, Trend data collection, Value, Zone

TO ZERO BELOW VALUE - System Prompts - Configuration - Inputs - Page 4-10

One of the choices for CUTOFF TYPE which specifies that the resultant IV (Input Value) is set to zero whenever the input value is less than the CUTOFF VALUE. Consequently negative values are set to zero. The CUTOFF VALUE must be positive.

TO ZERO NEAR ZERO - System Prompts - Configuration - Inputs - Page 4-10

One of the choices for One method of input cutoff type, when selected, sets the input value to zero whenever the absolute value is less than the specified value, thus allowing negative values, but zeroing small positive or nega- tive values. The CUTOFF VALUE must be positive.

TREND DATA COLLECT (Actuator)

Actuator that is controlled by the selected state at the TREND DATA COLLECT prompt found in the Chart Prompts section.

TREND DATA COLLECT (Prompt) - Chart Prompts - Page 6-14

Parameter that controls the TREND DATA COLLECT actuator. This parameter is like a special Operator Input which is pre-configured, but located in the Chart Prompts, as it causes no action directly, but merely changes the state of the TREND DATA COLLECT actuator. For some applications it may be desirable to control trend data collection with a prompt, so this was included in the Chart Prompts.

Trend data collection

A general term which refers to the instruments ability to collect trend data to be recorded when the chart is rotating for normal recording (which excludes initializing a new chart). If data collection remains on while the chart is not rotating or is being initialized, when rotation resumes, collected data will be recorded prior to recording current real time data. The instrument can collect up to 360 trend values. If an instrument is configured with 4 Recorders and a 24 hour chart speed, it could collect data for 36 minutes before it began to loose the oldest data. [(360 values / 4 Recorders) = 90 print cycles, times 24 seconds per print cycle (print interval), results in 2160 seconds or 36 minutes]

Value

A general term referring to a number or a parameter that is a number.

VALUE FILTER - System Prompts - Configuration

Parameter found in various sections that specifies the filtering to be applied to the value for all purposes. This filter affects the IV, PV, DV, etc. as it is used for alarming, recording or any other purpose. Zero specifies no filtering. A value of 1 to 9999 specifies the number of seconds over which values will be accumulated prior to calculating a new average for display. See DISPLAY FILTER.

V/MA CONV - System Prompts - Configuration - Inputs - Page 4-7

Parameter that specifies the type of conversion for the input. The choices are: LINEAR, SQRT, and EXP, for linear, square root, and exponential. If EXP is selected, the next parameter will be the exponential value.

WHEN DISPLAYED - System Prompts - Configuration - Operator Inputs - Page 4-84 Parameter that specifies when an Operator Input is displayed, ALWAYS or WHEN ENABLED.

If the WHEN ENABLED choice is selected, that Operator Input is not shown when OPERATOR INPUTS is DIS- ABLED in ENABLES & PASSWORDS.

Zone

The portion of the chart over which a trend line is to be recorded. The zone may be less than the maximum area available for recording. Trends can be recorded in two adjacent zones to allow for higher resolution on one end of the recorded span. Zones are established with respect to the number of rings or divisions on the chart, typically 70, 100, or 120 rings or divisions. Division 0 is the inner ring.

ZONE 1 HIGH - System Prompts - Configuration - Recorders - Page 4-47

Parameter that specifies the DIVISION or ring corresponding to the “top” end of the zone. This parameter also specifies the “bottom” of zone 2, if two zones are used.

Edition 3 C-14 Appendix C

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