10 monitoring, 1 permanent interruption of profibus communication, Monitoring – Lenze E84AYCPM User Manual
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10
Monitoring
10.1
Permanent interruption of PROFIBUS communication
81
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
is executed in the inverter (slave).
The process data are treated according to the setting in
. (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 (
) is set.
A value of "65535 ms" (Lenze setting) deactivates the monitoring.
• A response for the slave is set in
(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.