July 2013 3.6 HSCI 207
3.6.2 Topology
The HSCI slaves are connected—in series—to connector X500 of the main
computer. Connector X502 is always the HSCI input to the HSCI slaves and
X500 the HSCI output to the next HSCI slave.
The nonsynchronized second HSCI output X501 of the MC can be used to
connect a machine operating panel or a PLB 6001. However, do not connect
any devices other than a machine operating panel or a PLB 6001 to X501 (no
other or further HSCI components).
The HSCI components are connected via special shielded HSCI cables
adapted for the increased demands of machine tool environments.
Terminating resistors are not required in the HSCI system.
The HSCI network is to be structured as an "open" ring (line structure).
Connector X500 (or X501) on the main computer is the beginning of the HSCI
network. The HSCI connection is then led to X502 of the next HSCI participant
(CC, UxC, PL or MB), where X500 again serves as the output for continuing
the HSCI network to the next participant (X502). The last HSCI participant in
the ring detects its position automatically (X500 remains open) and internally
and independently closes the ring of the HSCI network.
An HSCI segment always starts from the connector X500 or X501. The first
HSCI segment starts at X500 of the MC and ends at the last HSCI component
connected to X500 of the MC. The second HSCI segment starts at X501 of the
MC and ends at the machine operating panel or a PLB 6001. The HSCI cabling
used within an HSCI segment must not exceed a total length of 70 m. The
individual cables can have any length, as long as the sum of their lengths does
not exceed 70 m.
A star configuration of the HSCI network (e.g. by using a hub) is not
possible.
The maximum permissible total length of the HSCI cables used within an
HSCI segment is 70 m.
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