Siemens SINAMICS S120 Function Manual page 169

Description
With the "synchronization" function, the converter phase angle can be synchronized with the
line phase angle in order, for example, to switch over (bypass) directly to the mains supply
afterwards. An additional application is to temporarily operate the motor from the line supply
in order to be able to carry out maintenance work on the drive converter without incurring
any down times.
Synchronizing is activated using parameter p3800 and either internal or external actual
voltage sensing is selected. With internal actual voltage sensing (p3800 = 1), the voltage
setpoints of the electrical motor model are used for the synchronization. For external actual
voltage sensing (p3800 = 0), the voltage is sensed using a VSM, which is connected to the
line phases. The voltage values must be transferred to the synchronization via connectors
r3661 and r3662.
Prerequisite
● Firmware version ≥ V2.4
● Drive object, vector/infeed with connected VSM10
● Induction motor without encoder
● Vector control
Function diagrams (see SINAMICS S120/S150 List Manual)
● 7020 Synchronization
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● p3800 Sync-line-drive activation
● p3801 Sync-line-drive object number
● p3802 BI: Sync-line-drive enable
● r3803 CO/BO: Sync-line-drive control word
● r3804 CO: Sync-line-drive target frequency
● r3805 CO: Sync-line-drive frequency difference
● r3819 CO/BO: Status word, synchronizing
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
Vector control
4.18 Synchronization
169