Operating instructions

Vector Control Chassis Type Frequency Converter Parameterizing steps
SIEMENS AG 476 869 4070 76 J AB-74
SIMOVERT MASTERDRIVES Operating Instructions 9-15
The reference quantities for current (P350), voltage (P351), frequency
(P352), speed (P353) and torque (P354) are set to the rated quantities
of the motor for displaying the visualization parameters and for
calculating the connector values.
With this parameterization, it is possible to display signals up to twice
the rated motor quantities. If this is not sufficient, change over to the
"Drive setting" menu (P060 = 5) in order to adjust the reference
quantities.
P107 = 52.00 Hz Rated motor frequency
P108 = 1500.0 rpm Rated motor speed
P109 = 2 Motor pole pair number
Pre-assignment:
P352 = 52.00 Hz Reference frequency
P353 = 1560 rpm Reference speed
If the reference speed is to be 1500 rpm, you have to set parameter
P353 to this value. The reference frequency is automatically adjusted
(P352 = P353 / 60 x P109)
P352 = 50.00 Hz
P353 = 1500 1/min
A setpoint speed of 1500 rpm corresponds to a setpoint frequency of
50.00 Hz or an automation value of 100.0 %.
The representation area ends at 3000 rpm (2 x 1500 rpm).
Normally the reference speed has to be set to the required maximum
speed.
If calculation is made with frequencies, not with speeds, the reference
frequency has to be adjusted. The reference speed is automatically
calculated (P353 = P352 x 60 / P109)
Reference frequencies of P352 = P107, P352 = 2 x P107,
P352 = 4 x P107 are favourable for the calculating time.
The reference value for torque can be set in P354.
The rated torque of the motor has to be set beforehand in P113. P113
does not have any influence on the torque accuracy of closed-loop
control; it only affects signal representation.
Reference quantities
Example
Torque reference
value