9 | Monitoring and diagnostics
STOBER
36
11/2019 | ID 442710.03
9
Monitoring and diagnostics
For monitoring purposes and in the event of a fault, the various monitoring and diagnostic options described below are
available.
9.1
Connection monitoring
In order that the drive does not respond in an unwanted manner in the event of an interruption of the PROFINET
connection (cable break, etc.), we recommend monitoring the arrival of cyclical process data.
PROFINET provides the watchdog time for connection monitoring. This time, in combination with the update time, defines
the IO cycle in the IO controller.
The update time determines the interval within which data is transferred from one IO controller to the IO device in
question (outputs) and vice versa (inputs). It depends on various factors including the data volume to be transferred and is
generally calculated in TIA Portal automatically for each IO device.
).
In addition to the watchdog time, the parameter A109 PZD-Timeout can be activated in DriveControlSuite. At the end of the
watchdog time projected in the IO controller, the PZD timeout also takes effect in the firmware of the drive controller.
Fault 52: Communication
Cause 4: PZD timeout
A109 PZD-Timeout
Time
Watchdog time
Connection interruption
Old data
Valid data
A109 PZD-Timeout
Fig. 6: PROFINET: Connection monitoring
The configured watchdog time runs down as soon as an error has occurred, and then the timeout parameterized in A109.
Once the timeout has also elapsed, the drive controllers changes to the
Fault
device state with the accompanying event 52:
communication, cause 4: PZD timeout.
