Operating instructions

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4.4 Baud rate setting/line length
The setting of the baud rate must be identical in all nodes on the system bus. The
maximum possible baud rate is based on the necessary overall line length of the sys-
tem bus. The baud rate is set via the parameter
Baud-Rate 903 and thus defines the
possible line length.
Operation mode Function max. line length
3 - 50 kBaud Transmission rate 50 kBaud 1000 meters
4 - 100 kBaud Transmission rate 100 kBaud 800 meters
5 - 125 kBaud Transmission rate 125 kBaud 500 meters
6 - 250 kBaud Transmission rate 250 kBaud 250 meters
7 - 500 kBaud Transmission rate 500 kBaud 100 meters
8 - 1000 kBaud Transmission rate 1000 kBaud 25 meters
A baud rate under 50 kBaud, as is defined according to CANopen, is not sensible for
the system bus as the data throughput is too low.
The maximum line lengths stated are guidelines. If they are made complete use of, a
calculation of the admissible length is to be done on the basis of the line parameters
and the bus driver (PCA82C250T).
4.5 Setting node address
A maximum of 63 slaves or frequency inverters with system bus can be operated on
the system bus. Each frequency inverter is given a node ID, which may only exist
once in the system, for its unambiguous identification. The setting of the system bus
node ID is done via the parameter
Node-ID 900.
Parameter Setting
No. Description min. max. Factory setting
900 Node-ID -1 63 -1
Thus, the system bus possesses a maximum number of 63 nodes (Network nodes),
plus one frequency inverter as a master.
Note:
With the factory setting of parameter
Node-ID 900 = -1, the system bus
is deactivated for this frequency inverter.
If the
Node-ID 900 = 0 is set, the frequency inverter is defined as a mas-
ter. Only one frequency inverter on the system bus may be defined as a
master.