System Rules - Siemens SINAMICS S120 Function Manual

14.12.2

System rules

A maximum of 24 drive objects (DOs) can be connected to one Control Unit.
Control Units
● The Control Unit CU310-2 is a single-axis control module for operating the AC/AC Power
Modules in Blocksize format (PM240-2 or PM340) and Chassis format. Terminal Modules,
Sensor Modules and HUB Modules can also be connected in addition to these.
● The CU320-2 Control Unit is a multi-axis control module for operating Infeed Modules and
Motor Modules in Booksize, Chassis and Blocksize formats. Terminal Modules, Sensor
Modules and HUB Modules can also be connected in addition to these.
Motor Modules (including closed-loop control modes)
For the CU310-2 Control Unit the following applies:
● The CU310-2 Control Unit is a single-axis control module (servo control, vector control or
vector control U/f control) plugged into a PM240-2 or PM340 Power Module, or for operation
with a maximum of one AC/AC Power Module in the Chassis format (via the X100 DRIVE-
CLiQ connection).
For the CU320-2 Control Unit the following applies:
● The CU320-2 Control Unit is a multi-axis control module for operating Motor Modules in the
Booksize, Chassis and Blocksize formats (PM240-2 and PM340 via a Control Unit Adapter).
● For multi-axis modules, each axis counts individually (one Double Motor Module = two
Motor Modules).
● A maximum of 6 drive objects may be operated concurrently in servo control and HLA
control.
● There can be a maximum of 12 drive objects of the VECTOR type present concurrently.
– A maximum of 6 drive objects can be operated simultaneously in vector control.
– A maximum of 12 drive objects can be operated simultaneously in U/f control.
● Mixed operation of control types:
The following are permitted:
– Mixed operation of servo control and U/f control.
– Mixed operation of vector control and U/f control.
– Mixed operation of HLA and servo control.
– Mixed operation of HLA and vector control and U/f control.
The following are not permitted:
– Mixed operation of servo control and vector control.
– Mixed operation of HLA and servo control and U/f control.
● The conditions prescribed in Chapter "Number of drives depending on the control mode and
cycle times (Page 854)" must be observed for operation of a CU320-2 with a
Control Unit Adapter CUA31 or CUA32.
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Basic information about the drive system
14.12 System rules, sampling times and DRIVE-CLiQ wiring
835