Installation OZD Profi 12M ...
Release 01 07/2017
29
CH1 in mode ”Monitor off“ (S0 = 1) must be activated on all OZD Profi
12M ... which are connected to the electrical star segment. This
deactivates the segmenting function of the RS 485 port on these OZD
Profi 12M ..., providing a high degree of availability of the electrical star
segment.
Ensure that the electrical star segment is wired carefully. Keep it as small
as possible to avoid interference injection into the electrical star segment,
and from here into the entire network. This can be achieved by laying out
the OZD Profi 12M ... in the electrical star segment directly next to each
other on a hat rail.
Switch on the terminating resistors in the bus port connectors at both ends
of the electrical star segment.
See “Connecting the electric bus cables” on page 47.
Do not connect a bus subscriber to the electrical star segment wherever
possible.
This applies exclusively to device variants OZD Profi 12M x22:
Connect other bus subscribers to the second electrical port (CH2).
Repeaters with one or two optical ports can be used to create an active
PROFIBUS star coupler. Repeaters with one optical port are sufficient for
connecting a terminal or an RS 485 bus segment to the active star coupler.
If the link monitoring on the optical ports is activated, the fiber optic links are
monitored by the respectively connected OZD Profi 12M ... .
Note:
Optical ports which are not assigned (for instance, because they are
reserved for a future system extension) indicate a fiber break if the link
monitoring is activated. You can prevent this error report from being issued
by activating the operating mode ”Line without fiber link monitoring“ at the
non-assigned ports. Please note that optical ports which are not connected
must always be fitted with protective caps to guard against extraneous light
and dirt.
Содержание OZD Genius G12-1300
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