Value Parameter

Communication Interfaces

Item settings, depending on what they are, use various value types.

Table 11 provides a list of the possible value types and their description.

Table 11	Value types
	Type	Definition

Numeric		An integer numeric value in the units indicated by the item name. For example, a
		System Voltage Rating of 480 would indicate 480 volts.
Scaled		Similar to the Numeric, this value type is an integer that has been scaled, usually to
		remove decimal points that would normally appear within the value. In this case, a
		value of 2.5 may actually be input as simply 25. For all Scaled types, the scaling
		appears in Table 12.
String		Certain settings are represented by alphanumeric character strings, such as setting
		the System Model Number to STS2.
Enumeration		This type uses an indexed list to represent possible choices. One example is the
		Modem Baud Rate which uses a value of 0 to select 2400 bps, 1 for 9600 bps, and 2
		for 19200 bps.
Bit-packed		This type of value uses a hexadecimal binary word, where each of the sixteen bits in
		the word has the value of 1 (True) or 0 (False). Although somewhat difficult to use, it
		packs a large amount of data within a single entry. A detailed description of this type
		appears in section 12.1.3 - Setting Bitpacked Options with the Terminal on
		page 81.
Event Masks		This type is a specially formatted and is used to customize the behavior of each fault
		and alarm in the system. See 12.1.4 - Setting Event Masks with the Terminal on
		page 83 for instructions on configuring Event Mask parameters.

Table 12 shows the various groups, the settings contained within, and the type of value it requires.

Table 12 Group settings and values