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10 Monitoring

10.1 Permanent interruption of PROFIBUS communication

Lenze · E84AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 5.0 EN · 11/2012 · TD17

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10 Monitoring

10.1 Permanent interruption of PROFIBUS communication

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

PROFIBUS master, no process data are transmitted to the slave being in the "Data Exchange" state.

After the watchdog monitoring time determined by the master has expired, the response

parameterised in C13880/1

is executed in the inverter (slave).

The process data are treated according to the setting in C13885

. (The data sent last by the master

can be used or can be set to zero.)

Preconditions for a inverter (slave) response

• A monitoring time of 1 ... 65534 ms for the "Data_Exchange" status (C13881

) is set.

A value of "65535 ms" (Lenze setting) deactivates the monitoring.

• A response for the slave is set in C13880/1

(Lenze setting "No response").

• The slave is in the "Data_Exchange" state.

• The watchdog monitoring time is configured correctly in the master.

If one of these preconditions is not met, the response to the absence of cyclic process data telegrams

from the master is not executed.

Settings and displays in the »Engineer«

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Lenze E84AYCPM Manual do Utilizador Página 81