Nord Drivesystems NORDAC LINK SK250E-FDS - Page 194

NORDAC LINK (SK 250E-FDS ... SK 280E-FDS) – Users Manual for Frequency Inverters as Field Distributors
194 BU 0250 en-3021
Addressing
If several frequency inverters are connected to a system bus, these devices must be assigned unique
addresses (P515).
For field bus modules, no assignment of addresses is necessary. The module identifies all the
frequency inverters automatically. Access to the individual inverters takes place via the field bus
master (PLC) Details of how this is carried out are explained in the relevant bus instructions or data
sheets for the individual modules.
I/O extensions must be assigned to the relevant frequency inverter. This is carried out by means of a
DIP switch on the I/O module. A special case for the I/O extensions is the "Broadcast" mode. In this
mode, the data from the I/O extension (analogue values, inputs etc.) are sent to all inverters
simultaneously. Via the parameterisation in each individual frequency inverter, a decision is made as
to which of the received values are to be used. More information about the settings can be found in
the Data sheets for the relevant modules.
Information
Addressing
Care must be taken that each address is only assigned once. In a CAN-based network double assignment of
addresses may lead to misinterpretation of the data and therefore undefined activities in the system.
Integration of devices from other manufacturers
In principle, the integration of other devices into this bus system is possible. These must support the
CANopen protocol and a 250 kBaud baud rate. The address range (Node ID) 1 to 4 is reserved for
additional CANopen masters. All other participants must be assigned addresses between 50 and 79.
Example of frequency inverter addressing
Frequency inverter Address
Node ID
Node ID AG
Frequency inverter
FI 1
32
33
FI 2
34
35
FI 3
36
37
FI 4
38
39
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