NORD Drivesystems BU2100 - Manual (Page 11)

4 Communication and Protocol
BU 2100 GB-2213 11
4. Communication and Protocol
4.1 Processing of Process Data in the Frequency Inverter
In the process data area (PZD), control words and setpoints are transferred from the master to the
frequency inverter and in return, status words and actual values are sent from the frequency inverter
to the master. The structure of the PZD area is always the same in terms of the sequence of its
elements (words), however, dependent upon direction of data Master  Slave / Slave  Master, it is
described differently. Each word has a length of 16 Bit. To communicate 32 Bit values (e.g. position
values), 2 words are required (e.g setpoint 1 and setpoint 2).