1.5 Sinec L2 Dp Field Bus - Siemens SIMATIC S5 Manual
Distributed i/o system
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1.5 SINEC L2 DP field bus
Definition
The SINEC L2 DP field bus interconnects all stations. The physical
connection to these stations is effected by means of bus connectors
(exception: RS 485 repeaters and programmer interface).
Characteristics
The characteristics of the SINEC L2 DP field bus are as follows:
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
reliable data transfer (hamming distance = 4, i.e. reliable detection of
three simultaneously occurring errors in the telegram)
high data-transfer rate with baud rates from 9.6 kbaud to 12 Mbaud
supports max. 32 hosts
supports max. 126 stations connected to the bus, of which a maximum of
124 may be DP slaves (max. 16 DP slaves connecting to an S5-95U with
DP master interface; max. 122 DP slaves connecting to an IM 308-C)
supports a maximum of 123 DP masters; the number of DP masters is no
longer limited to two, the restriction which applied to the IM 308-B
each slave can be connected to or removed from the bus without any
detrimental effect on the transfer of data (subject to certain rules as
described in Section 5.4)
range up to 1 km without RS 485 repeaters
range up to 10 km with RS 485 repeaters (order number of the RS 485
repeater is 6ES7 972-0AA00-0XA0)
range up to 23 km with fiber-optic cables
System overview
1-13
1
- Quick Links:
- IM 308-C Master Interface
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