User`s manual

General Information about INTERBUS-Configuration

Switching off

remote bus

branches

The INTERBUS can only function properly as a shift register if all bus nodes are

present and intact. If one node is switched off or fails, the data transfer is stopped

by the bus master.

With INTERBUS topologies with branch terminals (see example Construction of a

Tree Structure, p. 21), the bus master can be configured so that remote bus

branches after a branch interface module (CMD Tool, keyword group definition) can

be switched off. The bus master then hides branches that are switched off with the

help of the branch interface module, creates a new total frame and restarts the

remaining bus. The data transfer on the INTERBUS only stops briefly for the identity

cycle. This behavior must be configured on the bus master.

If a branch that was switched off should be included in the network again, the voltage

supply must be turned on and the reconfiguration button on the branch interface

module must be pressed.

Switching off the remote bus branches is frequently carried out when performing

maintenance on machine or system parts or are not completely present during the

commissioning phase. Even if one or several nodes fail unexpectedly, it is still

possible that the bus where the node failure occurred continues to run, with the

exception of the branches.

Transition from

Copper Cable ↔

Fiber Optic Cable

There are two standard converters available for the transition from copper cable

(RS485) to fiber optic cable and vice versa.

OPTOSUB, requires a voltage supply

OPTOSUB PLUS, does not require a voltage supply

The converters can be used with the following modules:

Module OPTOSUB OPTOSUB PLUS

BNO 671 0x yes yes

BNO 681 00 yes yes

All TSX Momentum with 170 INT 110 03 yes yes