Technical data

37
System bus / EM-SYS module
The “System Bus” of Active Cube inverters is a proprietary communication bus, based
on CANopen protocol that allows fast exchange of data between the inverters and
access, by a system bus master, to the parameters of all devices connected on the
network.
The system bus nodes (max. 64) are connected by a two-wire line.
The Bus termination (at either first or last node) can be activated via DIP switches of
the EM-SYS module.
The system bus is equipped with three PDO (Process Data Object) channels that allow
rapid exchanges of process data for each inverter. There are also two SDO (Service Data
Object) channels for parameterisation purposes.
Thanks to the three PDO channels, with one transmission and one reception channel,
all inverter data can be transmitted. Among other advantages, this makes it possible
to create master/slave and daisy chain configurations easily, while ensuring very high
precision and speed.
Each transmission and reception
channel includes 8 bytes that can be
freely occupied by objects, thereby
offering the maximum flexibility for
a very broad range of applications.
The selection of transmission objects
and reception objects is made easy by
the VPlus program, and no additional
configuration tools are needed.
Location of EM-SYS module on the
frequency inverter
CONTROLPARAMETERS
SDO 1SDO 2 PDO
CONTROLPARAMETERS
SDO 1SDO 2 PDO
SYSTEMBUS interfaceSYSTEMBUS interface
Field bus
interface
System bus Master System bus Slave(s)
PLC
Active Cube
Inverter
Active Cube
Inverter
Control system / PC