Siemens SINAMICS S150 NEMA, Руководство по эксплуатации

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Functions, monitoring and protective functions
9.3 Drive functions
Enclosed Drives
554
Operating Instructions, 12/2018, A5E36652151A
Function diagrams
FD 4704, 4715 Encoder evaluation
FD 6730, 6731 Interface to the Motor Module
Parameters
• r0069
Phase currents actual value
• r0089
Phase voltage actual value
• p0410
Encoder inversion actual value
• p1820
Reverse output phase sequence
• p1821
Direction of rotation
9.3.17 Unit changeover
Description
Parameters and process variables for input and output can be switched to a suitable units
system (SI units, US units or referenced variables (%)) with the help of the unit changeover
function.
The following constraints apply to the unit changeover:
● Unit changeover is only possible for the "VECTOR" and "A_INF" drive object.
● Parameters of the rating plate of the drive converter or the motor rating plate can be
changed over between SI/US units; however, a per unit representation is not possible.
● Once the changeover parameter has been changed, all parameters that are assigned to a
unit group depending on this parameter are jointly changed over to the new unit.
● A separate parameter is available for selecting technological units (p0595) for the
representation of technological variables in the technology controller.
● If a changeover is made to referenced variables and the reference variable is
subsequently changed, the % value entered in a parameter will not change.
Example:
–
A fixed speed of 80% corresponds, for a reference speed of 1500 rpm, to a value of
1200 rpm.
– If the reference speed is changed to 3000 rpm, the value of 80% is retained and is
now 2400 rpm.