Reference Quantities - Siemens MICROMASTER 440 Operating Instructions Manual

3 Functions
3.1.4

Reference quantities

Parameter range:
Physical quantities are normalized or de-normalized by the frequency inverter
when data is output or is being entered. This conversion is undertaken by the
particular interface using the reference quantities. The normalization / de-
normalization is carried-out for the following interfaces:
Table 3-5
Interafce
Analog input
Current input
Voltage input
Analog output
Current output
Voltage output
USS
CB
Further, for a BICO connection, a normalization is carried-out if the connector
output (CO) represents a physical quantity and the connector input (CI) a
normalized (percentage) quantity (e.g. PID controller). De-normalization is carried-
out if the inverse situation exists. This normalization / de-normalization should be
carefully taken into consideration, especially for the free function blocks (FFBs).
Reference quantities (normalization quantities) are intended to allow setpoint and
actual value signals to be represented in a standard fashion (normalization / de-
normalization of physical quantities such as setpoint and actual frequency). This
also applies for permanently set parameters that are entered as a "percentage". A
value of 100 % corresponds to a process data value PZD of 4000 h (USS or CB) –
or a current / voltage value of 20 mA / 10 V (analog input / output). The following
reference parameters and permanently saved reference values are available:
Table 3-6
Parameter
P2000
P2001
P2002
P2003
r2004
-
-
-
68
P2000 – r2004
Normalized interfaces
Normalization functions
Designation
Reference frequency
Reference voltage
Reference current
Reference torque
Reference power
Reference speed
Reference temperature
Reference energy
100 %
20 mA
10 V
20 mA
10 V
4000 h
4000 h
Value (100 % / 4000 h)
P2000
P2001
P2002
P2003
π * P2000 * P2003
P2000 * 60 / r0313
100 °C
100 kWh
MICROMASTER 440
Issue 10/06
Units
Hz
V
A
Nm
kW
RPM
°C
kWh
Operating Instructions
6SE6400-5AW00-0BP0