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Diagnostics

Monitoring with interrupted PROFIBUS communication

Permanent interruption of communication

118

EDSMF2133IB EN 5.0

9.3 Monitoring with interrupted PROFIBUS communication

9.3.1 Permanent interruption of communication

If the PROFIBUS communication is interrupted permanently, e.g. by cable breakage or

failure of the PROFIBUS master, no process data are transmitted to the slave in the

"Data_Exchange" (DATA_EXCH) state.

After the watchdog monitoring time has expired, the response parameterised in code

C1882 is effected.

The preconditions for a response by the slave are as follows:

1. The response has to be activated by the user by the selection "Fault", "Controller

inhibit" (CINH), or quick stop "QSP".

2. The slave has to be in the "Data_Exchange" state.

3. The watchdog monitoring time in the master has to be configured correctly by the

user.

If one of these preconditions is not met, there is no response to the absence of cyclic process

data telegrams of the master.

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