Changing Over The Unit System - Siemens SINAMICS G120 CU230P-2 HVAC Operating Instructions Manual

The parameters listed below are affected by the changeover.
Table 7- 32
P no.
r0206
p0307
p0316
r0333
r0334
p0341
p0344
r1969
*) Factory setting
7.9.1.2

Changing over the unit system

You change over the unit system using p0505. The following selection options are available:
● P0505 = 1: SI units (factory setting)
● P0505 = 2: SI units or % relative to SI units
● P0505 = 3: US units
● P0505 = 4: US units or % relative to US units
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
Variables affected by changing over the motor standard
Designation
Power Module rated power
Rated motor power
Motor torque constant
Rated motor torque
Motor torque constant, actual
Motor moment of inertia
Motor weight (for thermal motor type)
Speed_cont_opt moment of inertia determined
Note
Special features
The percentage values for p0505 = 2 and for p0505 = 4 are identical. In order to perform
internal calculations and output values that are changed back over to physical variables,
however, an important factor is whether the changeover process relates to SI or US units.
In the case of variables for which changeover to % is not possible, the following applies:
p0505 = 1 ≙ p0505 = 2 and p0505 = 3 ≙ p0505 = 4.
In the case of variables whose units are identical in the SI system and US system, and
which can be displayed as a percentage, the following applies:
p0505 = 1 ≙ p0505 = 3 and p0505 = 2 ≙ p0505 = 4.
Parameters affected by changeover
The parameters affected by changing over the unit system are grouped according to unit.
An overview of the unit groups and the possible units can be found in the List Manual in
the Section "Unit group and unit selection".
7.9 Application-specific functions
Unit for p0100 =
0* 1
)
kW HP
kW HP
Nm/A lbf ft/A
Nm lbf ft
Nm/A lbf ft/A
kgm lb ft
2 2
kg Lb
kgm lb ft
2 2
Functions
2
kW
kW
Nm/A
Nm
Nm/A
kgm
2
kg
kgm
2
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