Siemens 420 manual Attribute Description Group

3 Functions Issue 07/04

Table 3-1	Parameter attributes
Attribute	Attribute	Description
group
Data types		The data type of a parameter defines the maximum possible value range. 3 data
		types are used for MICROMASTER. They either represent an unsigned integer value
		(U16, U32) or a floating-point value (float). The value range is frequently restricted by
		a minimum, maximum value (min, max) or using drive inverter/motor quantities.
	U16	Unsigned, integer value with a size of 16 bits,
		max. value range: 0 .... 65535
	U32	Unsigned, integer value with a size of 32 bits
		max. value range: 0 .... 4294967295
	Float	A simple precise floating point value according to the IEEE standard format
		max. value range: -3.39e+38– +3.39e+38
Value range		The value range, which is specified as a result of the data type, is restricted/limited by
		the minimum, maximum value (min, max) and using drive inverter/motor quantities.
		Straightforward commissioning (start-up) is guaranteed in so much that the
		parameters have a default value. These values (min, def, max) are permanently
		saved in the drive inverter and cannot be changed by the user.
	-	No value entered (e.g.: "r parameter")
	Min	Minimum value
	Def	Default value
	Max	Maximum value
Unit		For MICROMASTER, the units of a particular parameter involve the physical quantity
		(e.g. m, s, A). Quantities are measurable properties/characteristics of physical
		objects, operations, states and are represented using characters of a formula (e.g. V
		= 9 V).
	-	No dimension
	%	Percentage
	A	Ampere
	V	Volt
	Ohm	Ohm
	us	Microseconds
	ms	Milliseconds
	s	Seconds
	Hz	Hertz
	kHz	Kilohertz
	1/min	Revolutions per minute [RPM]
	m/s	Meters per second
	Nm	Newton meter
	W	Watt
	kW	Kilowatt
	Hp	Horse power
	kWh	Kilowatt hours
	°C	Degrees Celsius
	m	Meter
	kg	Kilograms
	°	Degrees (angular degrees)

MICROMASTER 420	Operating Instructions
40	6SE6400-5AA00-0BP0