Measurement Of Current Control Loop - Siemens SINUMERIK 840Di sl Commissioning Manual

14.4.1

Measurement of current control loop

Functionality
The current control loop only needs to be measured for diagnostic purposes if there is a fault
or if no standard data was used for the motor/power module combination, and which resulted
in unsatisfactory speed controller frequency responses.
CAUTION
The user must take special safety measures when measuring the current control loop (e.g.
secure drive clamping) for hanging axes without external counterweight.
Operating path
Operating path for measuring the current control loop: Operating area switchover >
Commissioning > Optimization/Test > Current control loop
Measuring functions
The following measuring functions are available for measuring the current control loop:
Measuring type
Reference frequency response
(downstream of the current setpoint filter)
Setpoint step change (downstream of the
current setpoint filter)
Measurement
The measurement sequence is divided into the following steps:
1. Setting the traverse range monitoring and the enable logic
2. Selecting the measurement type
3. Setting the parameters, softkey "Measuring parameters"
4. Displaying the measurement results, softkey "Display"
Manual
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Drive Optimization with HMI Advanced
14.4 Frequency response measurements
Measured variable
Torque-generating actual current value/torque-
generating current setpoint
Measured variable 1: Torque-generating current setpoint
Measured variable 2: Torque-generating actual current
value
513