Rockwell Automation Publication 750-QS100B-EN-P - August 2020 25
Step 3: Power Up, Configure the Modular Control Profiles
Enter the Motor Side Bus Regulation Mode
Selects how the motor side inverter attempts to mitigate rising DC bus voltage during motor regeneration.
• Disabled - the motor side inverter does nothing to regulate the DC bus voltage. In this mode, the regenerative line
side converter or an external DC bus voltage control (brake resistor, regen module) is required to regulate the DC
bus voltage during motor regeneration.
– Disabled is the typical setting for a 755TR regenerative drive.
– Disabled is the required setting if you have installed an external brake chopper and dynamic brake resistor.
• Adjust Output Frequency - the motor side inverter adjusts its fundamental output frequency or torque, depending
on the motor control mode, to reduce the amount of motor regeneration. The use of this option may result in
extended deceleration times.
– Adjust Output Frequency is the typical setting for a 755TL low harmonic drive.
– Adjust Output Frequency is default motor side bus regulation mode.
1. Navigate to parameter 10:116 [Bus Reg Mode A].
2. Press the EDIT soft key.
3. Edit the value to 0 ‘Disabled’ or 1 ‘Adjust Freq’, choosing the option corresponding to the data collected in Table 3
on page 15.
4. Press the ENTER soft key.
Reset Device and Verify the Configurations
For the setting changes you entered earlier to be accepted, you must perform a Reset Device procedure. You can cycle
power to the drive and control pod or use the HIM. See Appendix A > Reset Device on page 53
, for more information.
To verify the configurations, verify the values of the following parameters:
IMPORTANT You must perform a Reset Device procedure to load the modified values of these parameters.
0:34 [VoltageClass Act] 0:47 [Vel Units Act] 0:71 [Application Act]
0:36 [Duty Rating Act] 0:66 [Pri MtrCtrl Act] 0:73 [Emb Logic Act]
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