Siemens SINAMICS G120XA - Reference Power; P_Ref; Reference Torque; M

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NOTICE

If various DDS are used with different motor data, then the reference quantities remain the same as these are not

changed over with the DDS. The resulting conversion factor must be taken into account.

Example:

p2002 = 100 A

Reference quantity 100 A corresponds to 100 %

p0305[0] = 100 A

Rated motor current 100 A for MDS0 in DDS0 --> 100 % corresponds to 100 % of the rated motor current

p0305[1] = 50 A

Rated motor current 50 A for MDS1 in DDS1 --> 100 % corresponds to 200 % of the rated motor current

When the reference current is changed, short-term communication interruptions may occur.

Note

Pre-assigned value is p0640.

If a BICO interconnection is established between different physical quantities, then the particular reference quantities

are used as internal conversion factor.

For infeed units, the rated line current, which is obtained from the rated power and parameterized rated line supply

voltage (p2002 = r0206 / p0210 / 1.73) is pre-assigned as the reference quantity.

Example:

The actual value of a phase current (r0069[0]) is connected to a test socket (e.g. p0771[0]). The actual current value

is cyclically converted into a percentage of the reference current (p2002) and output according to the parameterized

scaling.

p2003 Reference torque / M_ref

Access level: 3 Calculated: CALC_MOD_ALL Data type: FloatingPoint32

Can be changed: T Scaling: - Dynamic index: -

Unit group: 7_2 Unit selection: p0505 Function diagram: -

Min:

0.01 [Nm]

Max:

20000000.00 [Nm]

Factory setting:

1.00 [Nm]

Description: Sets the reference quantity for torque.

All torques specified as relative value are referred to this reference quantity.

The reference quantity corresponds to 100% or 4000 hex (word) or 4000 0000 hex (double word).

Dependency: This parameter is only updated during the automatic calculation (p0340 = 1, p3900 > 0) if motor commissioning was

carried out beforehand for drive data set zero. This means that the parameter is not locked against overwriting using

p0573 = 1.

Siemens SINAMICS G120XA - Reference Power; P_Ref; Reference Torque; M_Ref