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MOVIFIT® Master-Slave Topology


Theory of operation
In a master-slave installation, the master unit takes on the communication link for several slave units. The slave units are connected to the master unit via a system bus (SBus). The master unit thus serves as a gateway for several slave axes.

Master unit
A master unit is a standard MOVIFIT® MC, SC or FC with integrated communication interface and Technology function level.

Slave unit
A slave unit is a MOVIFIT® SC or FC unit without fieldbus interface, only with power section (frequency inverter or motor starter). A slave unit has four digital inputs. Communication with the higher-level system controller takes place through the master unit. The master unit transfers the data to the respective slave unit via SBus.


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Merkbox
    Customer benefits
  • Master: Standard-MOVIFIT® with Technology function level
  • Cost advantage with slave units without bus module
  • 1 to 7 MOVIFIT® drive controllers possible for only one bus address
  • Local control possible in master


Master-Slave installation with a MOVIFIT® FC as master and two MOVIFIT® FCs as slaves:



Schematic representation of system topology

A mixed setup is also possible. Master-Slave installation with a MOVIFIT® FC as master and two MOVIFIT® SCs as slaves:


Schematic representation of system topology

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Merkbox
    Advantages
  • Only one fieldbus node for one function line, which reduces the
    number of bus addresses
  • Simple and cost-effective implementation of multi-axis applications
    (roller conveyors, hoists, rotary tables)
  • Cost-effective, future-oriented Ethernet communication by omitting Ethernet interfaces
  • Drive-oriented application functions are executed in the master unit. The intelligent fieldbus interface controls subsequent power sections
    (there is no synchronous operation).
  • Modularization of the system: Multi-axis functions are combined within one function line

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