CTEK Automation Control Application APN007 - Manual (Page 26)

Application Note – Automation Control Application
APN007 25 July, 2014
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somewhat smaller than the theoretical due to sensor characteristics and minor variations
in the reference voltage.
Min[Max] Units PA
This is a quantitative value for the low end of the expected engineering value
measurement of this sensor. For example for a temperature sensor that is designed to
measure between 10° and 300° the minimum Units would be 10, the Max Units would be
300, and the Units of Measure would be degrees.
Correction PA
A specific correction or offset for this input. This can be used to correct for minor
variations in sensors that cannot be corrected in a common input formula.
Multiplier PP
The value of an individual pulse. For example, if the multiplier value is for a gallons per
minute calculation is 10 each pulse will be counted as 10 gallons and the value (10 *
number of pulses * 60) would yield a gallons per minute value.
Interval PP
The time interval in seconds to be used in scaling the pulse input for control panel output.
For instance, an input measured in gallons per minute (GPM) would use an interval of 60
seconds (1 minute) to scale the input.
Input Source
(Numeric)
VN
Identifies the source(s) that will be used to define the state of a virtual numeric input. The
value of other input pins or virtual output pins can be assigned through this setting. Also,
numeric events occurring on the SkyRouter platform can be assigned as a pin’s value.
Examples of the later would be RSSI or Latitude. See table of Numeric Input sources
below.
Initial Reference
(Numeric)
PA, PP, VN
The initial reference is the first value that a numeric or analog pin will be compared to after
a power up or execute new configuration. The initialization comparison will be made
against the Initial Value (see next) which is assigned to a pin during the start up. Alarms
are not issued during the initialization comparison but program actions will occur. This
provides a starting point (usually at one of the extremes) for evaluating the pin against
actual values once the initialization has completed which in turn provides a method of
conditioning the managed machines or devices to a quiescent state before normal
operation begins.
Initial Value
(Numeric)
PA, PP, VN
The initial value that will be assigned to a pin for comparison during the initialization
(power up) phase. See Initial Reference above.
Decimal Scale VN
Assigns levels of decimal precision to the value represented by the virtual numeric input
pin. Choices are 2 digits, 6 digits, or zero digits.
Figure 22 - Input Pin Definitions