Operating Manual CMGZ 622
58
16
PROFIBUS Hardware Interface Description
16.1
Wiring of the PROFIBUS Data Cable
Wiring of the PROFIBUS cables
The standardized PROFIBUS cable type A (STP 2x0.34
2
) [AWG] has to be used for
the PROFIBUS data cable. The cables are bared referring to fig. 6 and connected to
the terminals according to the wiring diagramm.
The shield is connected with the bracket to the shoulder inside the housing.
Caution
The shield of the PROFIBUS cable is only grounded if the bracket inside the housing
clamps directly to the shield If the bracked clamps to the plastic mantle, no grounding
is done! Therefore the plastic mantle has to be fixed only with the PG gland (referring
to fig. 6)
Termination
If both cables are connected (Bus in and Bus out), if has to be ensured that the two
termination dip switches are in off position.
If only one cable is connected (Bus in), both termination dip switches have to be set in
on position.
main board
9
9
9
9
Profibus
J802
PG
A
B
(out)
(in)
A
B
(out)
(in)
(rot)
(gr n)
(colour codes Siemens)
(rot)
(gr n)
fig. 23: Profibus board
E621009
fig. 23A connection Profibus
B600030e
Note
The PROFIBUS network has to be terminated properly. Otherwise the installation
cannot be set into operation. It has to be ensured that only the last device of the
PROFIBUS chain is terminated.
16.2
Setting the PROFIBUS Address
The tension controller requires a unique PROFIBUS address which indicates it
definitely in the whole PROFIBUS network. Therefore no other PROFIBUS device in
the network may use the same address. The address has to be between 2...125.
The PROFIBUS address is set with the system parameter
Identifier
. (See 14.4
Description of the system parameters). After switching the measuring amplifier off
and on, the new address is valid.
