Honeywell VRX180 User Manual

Page 155

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Programming Function Blocks and Features

Video Recorder – User Manual

141

CEMS Block Average

Outputs a block mean average CVn OV over the specified Average Period. The average is calculated
from input samples taken at equally spaced Sample Periods. All samples are discarded at the end of
the Average Period and the Average Period begins again.

Samples are ignored when Calibrate Hold is ON(1). After the Average Period the new average is
calculated using only the samples taken before and after the Hold. If no valid samples are taken, the
output maintains its previous value.

Table 4-48 describes the CEMS Block Average prompts. See Table 4-2 for additional prompts.

Table 4-48 CEMS Block Average Prompts

Prompt

Range/Selections

Definition

RANGE LOW

RANGE HIGH

OFF or number

Enter the output’s display limits. Output is not clamped or
flashed when it exceeds these limits.

INPUT

OFF, analog parameter, number

Input to be averaged

RESET

OFF, discrete parameter, 0, 1

When discrete is ON(1), average is reset to zero; when
ON(1)-to-OFF(0), average restarts.

TIME UNITS

SECONDS, MINUTES, HOURS,
or DAYS.

Time units of the averaging period

AVERAGE PERIOD

OFF or number

Number of time units per average period.

SAMPLE PERIOD

OFF or number

Number of time units between samples. Must divide
evenly into Average Period.

CALIBRATE HOLD

OFF, discrete parameter, 0, 1

When ON(1), no samples are taken and the output is held.

CEMS Rolling Average (CEM Rolling Avg)

Outputs a rolling mean average CVn OV over the specified Average Period. Average is updated every
Frame Period thereafter. Samples are taken at every scan cycle of the instrument, except when
Calibrate Hold is ON(1).

Frame Period

Average Period

Inp ut

Time between samples = 1 machine scan cycle

First average

Second average

Third average

Figure 4-15 CEMS Rolling Average

Table 4-49 describes the CEMS Rolling Average prompts. See Table 4-2 for additional prompts.

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