Lenze E94AYCPM - Manual (Page 78)

11 Monitoring
11.1 Permanent interruption of PROFIBUS communication
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Lenze · E94AYCPM communication module (PROFIBUS®) · Communication Manual · DMS 12.0 EN · 11/2012 · TD17
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11 Monitoring
11.1 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 PROFIBUS master has expired, the response
parameterised under C13880/1 / C14880/1 is executed in the controller (slave).
The process data handling depends on the setting in C13885 / C14885 . (The last data sent by the
master can either be used or set to zero.)
Preconditions for a controller (slave) response
• A monitoring time of 1 ... 65534 ms is set for the "Data_Exchange" state ( C13881 / C14881 ).
A value of "65535 ms" (Lenze setting) deactivates the monitoring.
• A response is set for the slave in C13880/1 / C14880/1 (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« ( 80)