Table 4-7 Custom Algorithm Prompts - Honeywell VPR100 User Manual

Programming Function Blocks and Features
Custom algorithm prompts
Table 4-7 describes the custom algorithm prompts. See Table 4-2 for additional prompts. These prompts
appear only if CUSTOM INPUT is enabled under FEATURES. See Section 4.19.
Prompt
INPUT SIGNAL
RJ ENABLE
EMISSIVITY ENABLE
Xn
Yn
ELECTRICAL UNITS
LAG
SAMPLE HOLD
Press Menu when entries are complete. At the prompt "PRESS ENTER TO SAVE", press Enter to save
your changes, or press Menu again to exit the session without saving the changes.
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Table 4-7 Custom Algorithm Prompts

Range/Selections
EMF, TC, or RTD.
Select Yes for reference junction
compensation, NO for no
compensation.
Select Yes for emissivity
compensation for emf input.
You must input at least 2 coordinates.
X must increase by at least 0.00001.
Y values are not limited except in the
following 2 cases.
1. If the incoming signal is from a
thermocouple and reference junction
compensation is on, make sure that a,
b, and c are all true.
a) All Y's are increasing or all are
decreasing.
b) Y range includes 0-65 °C.
c) Temperature units are F, C, K,
or R.
2. If Online adjustment of the value is
desired, make sure that all Y's are
increasing or all are decreasing.
MV, OHMS, VOLTS
• 0 seconds or OFF
OFF, discrete parameter, 0, 1
VPR & VRX – User Manual
Definition
Selects the input hardware
Reference junction
compensation
Emissivity compensation for
emf input.
Use these prompts to plot a
curve of up to 20 points, where
X n is the incoming signal in
the electrical units selected
and Y n is its corresponding
value in the temperature units
selected. Interpolation is
straight-line.
Units of the electrical signal.
LAG is a time constant applied
to the input measurement
value. This provides digital
filtering (LAG) to the
measurement.
Lag appears on menu only if
EXPANDED INPUT is enabled
under Enable Features in the
Program menu.
Holds Input. The input value is
measured normally when this
discrete is OFF (0) and holds
its last value when the discrete
is ON (1).
Hold appears on menu only if
EXPANDED INPUT is enabled
under Enable Features in the
Program menu.
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