Softing PROFIBUS Tester 5

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PROFIBUS Tester 5 (BC-700-PB) - User Manual

Cable test

The cable test assesses the wiring and can be used to determine a faulty cable location (e.g. short

circuit) by means of reflection test. All three features can only be used during shutdown of the

installation. The D-sub cable BC-600-PB-CB-DSUB-2 which is included in the standard scope of supply

must be used. As long as communication is detected on the bus, i.e. at least one device is an active

master, the functions are disabled. Check If necessary, disconnect every single active device (PLC, MPI

and, if necessary, diagnostic repeaters) from the power supply or the bus. If an active device is at the

end of the bus you want to test, its PROFIBUS connector needs to be unplugged and connected directly

to the PROFIBUS Tester 5 (BC-700-PB). The bus termination in the device connector will then be

Figure 20: Connection points for topology scan and cable test

Bus stations must only be disconnected from the power supply or the bus during shutdown

of the installation.

The three functions can be started also when the BC-700-PB is disconnected from the bus. If

you then connect the BC-700-PB to a live bus despite the yellow bus status bar indicated by

the PC software, this can cause bus communication problems or a shutdown of the

installation.

Special case: active devices at both ends o the bus during topology scan

On the very rare occasion when there is an active device at each end of the bus, do the following:

1. When using D-sub connection:

a. Additionally switch on the terminating resistor in the D-sub connector of the last slave.

b. Make sure the outgoing cable to the active device at the bus end is connected to the outgoing

connector (marked with "OUT", an outgoing arrow, or "A2/B2").

Softing PROFIBUS Tester 5 - Page 24