Table 3-5 Normalized Interfaces; Table 3-6 Normalization Functions; Reference Quantities - Siemens MICROMASTER 420 Operating Instructions Manual

3 Functions
3.1.3

Reference quantities

Parameter range:
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
Interface
Analog input (voltage input)
Analog output (current output)
USS
CB
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
Parameter
P2000
P2001
P2002
-
-
-
50
P2000 - P2002
Normalized interfaces
Normalization functions
Designation
Reference frequency
Reference voltage
Reference current
Reference speed
Reference temperature
Reference energy
100 %
10 V
20 mA
4000 h
4000 h
Value (100 % / 4000
h)
P2000
P2001
P2002
P2000 * 60 / r0313
100 °C
100 kWh
MICROMASTER 420
Issue 07/04
Units
Hz
V
A
RPM
°C
kWh
Operating Instructions
6SE6400-5AA00-0BP0