Concepts
9
RMS NetLinx Programmer’s Guide
Parameter Values
Each parameter has a set of values used to determine what conditions indicate a
problem and what type of problem this condition represents. These values are
supplied when the parameter is registered and consist of the following:
Parameter Values
Name
This is the name of parameter. This name is displayed on the
RMS server console and readily identifies the parameter.
Parameters are tracked by name so this name must be unique
within the parameters of a given device. For instance, you can
have multiple "Lamp Hours" parameters as long as there is
only one "Lamp Hours" parameter per monitored device.
Parameter Type
This value indicates if this value is a number or a string. This
information is used to determine how to perform certain
operation, such as addition and comparisons between the new
and threshold values. For instance, comparing "10" and "2" as
strings results in "10" less than "2" but comparing them as
numbers results in "2" less than "10".
Value and Units
This is the current value of the parameter. Units are appended
to the value when displayed in the web console.
Threshold Value and
Comparison Operator
The threshold value is the value for which this parameter is
considered to indicate a problem or fault. The comparison
operator is used to detect when the value changes from the
un-faulted to the faulted condition. The comparison operators
"Less Than", "Less Than or Equal To", "Greater Than",
"Greater Than or Equal To", "Equal To", and "Not Equal To"
can be used for string and number parameters. The
comparison operators "Contains" and "Does Not Contain" are
primarily used for string parameters.
For example, "Lamp Hours" might have a threshold value of
1000 and any value over this would require maintenance. The
comparison operator would then be "Greater Than". When this
parameter changes from a value that is not greater than 1000
to a value that is greater than 1000, the fault status is set.
When the value changes from a value greater than 1000 to a
value not greater than 1000, the fault status is cleared. These
value are supplied during registration but can be modified by
the administrator from the RMS server console.
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