Installation manual

General Information About Configuration Parameters
900M050U00  Athena Controls, Inc. 4-3
4.3 Information Provided About Each Parameter
4.3.1 Summary
Each menu consists of a functional group of parameters. For each parameter the
following information is provided:
• parameter name (and number) – See 4.6 for information about the purpose
of this number (or alphanumeric designation).
• abbreviated name as displayed
• controller models that use the parameter – Note that “all” in the “used by”
paragraph means that the parameter can apply to the 1ZC, 16C, 18C, and
25C. However, even though a parameter can be used by a controller does
not mean that every control strategy uses the parameter. Read the “when
displayed” information and the description to find any special information
about the applicability of a particular parameter.
• when displayed – This paragraph indicates whether the parameter applies
to all control strategies (“always”) or only under certain circumstances (which
are identified).
• choices or range – If you must make a selection from a list, all the choices
are listed in the sequence in which they appear (on a 16C controller) if you
scroll through the list using the key. If you must specify a numerical
value, then the range of valid values is defined. For some parameters the
range is reduced if a linear input is used. See 4.3.2 for details.
• factory default value – The default value is shown for each configuration
parameter. The configuration parameters in 16C, 18C, and 25C controllers
can be returned to their default values using the procedure in 12.5.
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• description – The purpose of the parameter and any special information you
need to know to use this parameter is provided.
• effect on other parameters – For some parameters, additional information
is included. If applicable, this paragraph tells how the value selected for a
parameter affects other parameters.
4.3.2 Effect of Linear Input on Numerical Ranges
If the controller uses a linear input and the dSLPdSLP (display) menu dEC.pdEC.p (decimal position)
parameter is not set to 0 (zero), the number of decimal places specified is always
imposed on the parameter’s value. This has the effect of reducing the range of valid
values for many parameters when a linear input is used. The parameters affected are
denoted by a cross-reference to this sub-section.
For example, suppose the range of valid values for a parameter is –1999 to 9999.
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With the exception of the 1ZC controller ID (address), the defaults in all Series C controllers can be
returned to the factory defaults using a MODBUS write function. See Using the MODBUS Protocol with
Athena Series C Controllers for more information.