Operating instructions

Commissioning
5.9 Parameters
Control Units CU240S
Operating Instructions, 10/2007, A5E00766042B AC
113
Can be changed
"P" parameters can only be changed depending on the inverter state. The parameter value is
not accepted if the instantaneous state is not listed in the parameter attribute "Can be
changed". For instance, the quick commissioning parameter P0010 with the attribute "CT"
can only be changed in quick commissioning "C" or ready "T" but not in operation "U".
Table 5-17 Parameter attributes - Can be changed
State Description
C Quick commissioning
U Operation (Drive running)
T Drive ready to run
Data types
The data type of a parameter defines the maximum possible value range. Five data types
are used for the inverter. They either represent an unsigned integer value (U16, U32) or a
floating-point value (float). The value range is frequently restricted by a minimum and
maximum value (min, max) or using inverter/motor quantities.
Table 5-18 Parameter attributes - Data types
Data type Description
U16 Unsigned, integer value with a size of 16 bits
U32 Unsigned, integer value with a size of 32 bits
I16 Signed integer 16-bit value
I32 Signed integer 32-bit value
Float A simple precise floating point value according to the IEEE standard format
max. value range: -3.39e+38 –+3.39e+38
Unit
The values of parameters support the following units:
Table 5-19 Parameter attributes - Unit
Unit Description Unit Description
- No dimension m/s Meters per second
% Percentage Nm Newton meter
A Ampere W Watt
V Volt kW Kilowatt
Ohm Ohm Hp Horse power
us Microseconds kWh Kilowatt hours
ms Milliseconds °C Degrees Celsius
s Seconds m Meter
Hz Hertz kg Kilograms
kHz Kilohertz ° Degrees (angular degrees)
1/min Revolutions per minute [RPM]