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Action
Make sure that it is safe to connect voltage:
• nobody is working on the unit or circuits that are wired from outside into the cabinets
• covers of the motor terminal boxes are on
• cabinet doors are closed
• the disconnecting device [Q1] is open.
Close the auxiliary voltage switch-disconnectors [Q20, Q22].
Setting up the supply unit parameters
￭
Action
Activate communication between the inverter and supply units as follows:
• Set bit 11 of supply unit parameter 195.20 HW options word 1 to 1.
• Set bit 11 of inverter unit parameter 95.20 HW options word 1 to 1 and parameter 61.152 INU-
LSU data set 10 data 2 sel to 01.11 DC voltage .
Adjust the parameters for the DC voltage measurement:
• Set parameter 162.52 Data set 10 data in 2 selection to External DC meas signal .
• Set parameter 195.40 DC voltage source to External measurement signal (an inverter unit
measures the value and sends it to supply unit).
• Activate the DC link voltage monitoring function and define the DC overvoltage and under-
voltage limits by selecting the supply voltage class by parameter 195.01 Supply voltage .
Note: You can alternatively set analog inputs AI1 and AI2 as the source of the DC measurement
signal by parameter 195.40 DC voltage source .
For charging:
• Set parameter 110.24 RO1 source to Charging .
• Set parameter 120.30 External charge enable to Yes .
Note: The charging function uses the DC voltage measurement signal. Set also the DC voltage
measurement parameters for charging.
Define the source for the fuse trip monitoring:
• Set parameter 111.09 DIO2 function to Input .
• Set parameter 131.38 Fuse trip fault source to DIO2 .
Make sure that the source for the auxiliary circuit breaker monitoring is set to digital input DI4
( 131.32 Aux circuit breaker fault source = DI4 ).
Powering up the main circuit of the drive
￭
Action
Close the disconnecting device of the supply unit.
Drive with main switch-disconnector [Q1]: Unlock the main switch-disconnector, and close it.
Close the charging disconnector for the line-up.
Make sure that the control panel [A59] is in the remote mode (Loc/Rem key of the panel).
Drive with brake chopper: Make sure that there are inverters connected to the DC bus before
closing the main contactor. A rule of thumb: The sum capacitance of the inverters connected to
the DC bus of the drive must be at least 50% of the sum capacitance of all inverters of the drive.
If there is not enough capacitive load at start, the DC voltage can exceed the overvoltage limit,
causing immediate start of the brake unit and continuous supply for it by the supply unit. Con-
tinuous braking will overload brake choppers and resistors and cause overheating.
Start-up 77
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