10 monitorings, 1 permanent interruption of profibus communication, Monitorings – Lenze E84Dxxxx User Manual
Page 64: Permanent interruption of profibus communication, Communication manual 8400 protec profibus
EDS84DPBUS EN 2.0 - 09/2010
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Communication manual 8400 protec PROFIBUS
Monitorings
Permanent interruption of PROFIBUS communication
10
Monitorings
10.1
Permanent interruption of PROFIBUS communication
If the PROFIBUS communication is interrupted permanently, e.g. by cable breakage or
failure of the PROFIBUS master, no process data is transmitted to the slave being in the
"DATA_EXCHANGE" status.
After the watchdog monitoring time determined by the PROFIBUS master has expired, the
response parameterised in
is executed in the controller.
The process data are treated according to the setting in
. (The data last sent by the
master may be used or set to zero.)
Preconditions for a controller (slave) response
A monitoring time of 1 ... 65534 ms for the "Data_Exchange" status (
A value of "65535 ms" (Lenze setting) deactivates the monitoring.
For the slave, a response is set in
(Lenze setting: "No response").
The slave is in the "Data_Exchange" status.
In the master, the watchdog monitoring time must be configured correctly.
If one of these preconditions is not met, the response to the absence of cyclic process data
telegrams from the master is not executed.