Festo CTEU-DN, Description, Functions And Maintenance

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2. Installation and interfaces
2-15
Festo P.BE-CTEU-DN-OP+MAINT-EN en 1206NH
2. Set the baud rate: when setting the baud rate, take into
account the length of the network lines (main bus line,
branch lines and branches)
see note below.
Note
Maximum effective data rate (baud rate)
The setting of the baud rate depends on the length of all
fieldbus connecting cables (network lines).
•
Consider the length of the fieldbus line between the PLC
and bus node (main bus line) as well as the length of any
existing branch lines and branches for continued field-
bus configuration.
•
Also consider the overall length (sum) of all branch lines.
•
The table below contains reference values for the max-
imum baud rate, depending on the line lengths. The
baud rates named here are not supported by all control-
lers.
•
Observe any deviating specifications in the manual of
your control system or network scanner.
•
Further information can be found in the specifications of
the ODVA
www.odva.org.
Max. data rate (baud rate)
dependent on the line length (reference values)
Main bus
line
(Trunk line)
Branch line
(Drop line)
Baud rate
Individual branch line All branch lines (total)
Max. 100 m Max. 6 m Max. 39 m 500 kBaud
Max. 250 m Max. 6 m Max. 78 m 250 kBaud
Max. 500 m Max. 6 m Max. 156 m 125 kBaud
Tab. 2/8: Maximum data rate (baud rate)