NORD Drivesystems BU2200 - Manual (Page 13)

POWERLINK Bus module –
Supplementary manual options for NORD - Frequency Inverters
BU 2200 GB-3813 13
State Explanation
Operational Parameter communication active, process data communication active
The interface is in the OPERATIONAL state.
Basic Ethernet In this state, parameter communication is only possible via UDP/IP. If a POWERLINK
communication is detected during this state, the interface switches to the state PRE
OPERATIONAL 1. If the red LED lights up in this state, this means that the Manager
has failed.
Stopped Output data are not sent out and no input data are delivered. This state can only be
achieved and exited by a corresponding command from the Manager.
Table 5: Explanation of the NMT State Machine
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4.2 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).
Pos : 31 /Anl eitungen/ Elektroni k/ Bus s yst eme/4. Kommuni kati on und Prot okoll + Proz ess datentr ans fer /Pr ozes sdat en ver arbeit ung i m FU allgemein/Steuer wort ( ST W) @ 1\ mod_1336386809690_388. doc x @ 25519 @ 3 @ 1