03.2010
Communication / CBC
Siemens AG
6SE7087-6QX70 (Version AL)
SIMOVERT MASTERDRIVES
Compendium Motion Control
8.4-13
8.4.3.3
Bus termination of the CAN bus (jumper S1.2)
For fault-free operation of the CAN bus, the bus cable must be
terminated with bus terminating resistors at both ends (see Fig. 8.4-11).
The bus cable from the first CAN bus node up to the last CAN bus node
is to be regarded as
one
bus cable so that the CAN bus must only be
terminated twice.
The bus terminating resistors must be connected into the circuit at the
first bus node (e.g. the master) and the last bus node (e.g. the slave). If
the bus-terminating node is a CBC, please close jumper S1.2 of the
DIP-FIX switch, S1, on the CBC board!
Please ensure that the bus termination is only connected in the circuit
at the first bus node and the last bus node (e.g. CBC)!
Jumper
Function
As supplied
S1.2
Bus termination X458/459
Open (no bus termination)
Table 8.4-3
Bus termination with switch S1
8.4.3.4
Ground connection (jumper S1.1)
Jumper S1.1 normally remains open. If the CAN bus interface of the
master is operated as a ground-free interface, you can close jumper
S1.1 on one converter in order to connect the bus to ground.
Jumper
Function
As supplied
S1.1
Ground connection, interface
ground (X458/459)
Open (no bus
termination)
Table 8.4-4
Ground connection with switch S1
For fault-free operation of the CAN bus, the bus cable must be
terminated with bus terminating resistors at both ends. The bus cable
from the first CAN bus node up to the last CAN bus node is to be
regarded as one
bus cable so that the CAN bus must only be
terminated twice.
Switch S1.2 of the bus terminating resistors is located on the optional
board behind connector X458.
If the CAN bus interface of the master is to be operated ground-free,
you can close switch S1.1 at one node in order to connect the bus to
ground.
The switch for ground connection is located on the optional board
behind connector X458.
NOTE
NOTE
NOTE