Siemens MICROMASTER 420 - Manual (Page 50)

3 Functions Issue 07/04
MICROMASTER 420 Operating Instructions
50 6SE6400-5AA00-0BP0
3.1.3 Reference 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
h) Units
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