Siemens 420 manual Reference quantities, Interface 100 %, Parameter Designation Value 100 % Units

3 Functions Issue 07/04

3.1.3Reference quantities

Parameter range: P2000 - P2002

When being output or read-in by the drive inverter, physical quantities are normalized or de-normalized. This conversion is made directly by the particular interface using the reference quantities. The normalization / de-normalization is carried-out for the following interfaces:

Table 3-5	Normalized interfaces
Interface		100 %
Analog input (voltage input)		10 V
Analog output (current output)		20 mA
USS		4000 h
CB		4000 h

Further, a normalization is carried-out for a BICO connection if the connector output (CO) represents a physical quantity and the connector input (CI) a normalized (percentage) quantity (e.g. PID controller). A de-normalization is carried-out if the inverse applies.

Reference quantities (normalization quantities) are intended to allow setpoints and actual signals to be represented in a uniform, standard way (normalization / de- normalization of physical quantities such as setpoint and actual frequency). This also applies to permanently set parameters that are assigned the "percentage" units. A value of 100 % corresponds in this case to a process data value PZD of 4000 h (USS or CB) or a current value of 20 mA (analog output) or a voltage value of 10 V (analog input). The following reference parameters and permanently saved reference values are available:

Table 3-6	Normalization functions
Parameter		Designation	Value (100 % / 4000	Units
			h)
P2000		Reference frequency	P2000	Hz
P2001		Reference voltage	P2001	V
P2002		Reference current	P2002	A
-		Reference speed	P2000 * 60 / r0313	RPM
-		Reference temperature	100 °C	°C
-		Reference energy	100 kWh	kWh

MICROMASTER 420	Operating Instructions
50	6SE6400-5AA00-0BP0