Technical data

30
RS485 / CM-485
serial and Modbus communication
Modbus communication
The communication module CM-485 allows to use the Modbus Communication profile
to be used. The communication profile can be easily changed to Modbus with a
parameter. Therefore a very inexpensive solution is available to integrate the Active
Cube inverters in a Modbus Communication environment with the standard Active
Cube devices and a standard module.
There are two profiles available. The Modbus RTU profile is well established and known
to the experienced Modbus user, which offers quick communication between different
devices. Additonally, Modbus ASCII is supported as well, which allows easy set up and
diagnosis of the communication between different devices.
The address range allows values in the range between 1 to 247.
Cable lenght Max Baud rate
up to 12000m 4.8
up to 2000m 19.2
Cable length limits the transmission
bandwith. Above table shows the match
between admissible cable lengths and
corresponding max kBaud rates. Values are
indicative and may significantly change
in relation to the transmission cable
characteristics.
Location of module CM-485 on the
frequency inverter
CM-485 moduleCM-485 module
PC/Notebook