FC310x as master
FC3101 and FC3102
54
Version: 3.0
3.8.2.6
DP Diag tab
Fig. 31: TwinCAT 2.9 - DP-Diag tab
Here, bus cabling problems and DP cycle times are displayed:
detected bus-errors:
Here, the number of detected bus errors is displayed. If this counter is not equal 0, the
cabling should be checked (provided that no PROFIBUS connectors were pulled or inserted - usually there
are short bus disturbances during pulling or inserting of PROFIBUS connectors).
CycleWithRepeatCounter:
Here, the number of PROFIBUS cycles is displayed, in which a telegram was
repeated at least once. Repetitions are also an indication that the physical bus characteristics are not 100%
OK.
max. Repeat/Cycle:
Here, the maximum number of repetitions within a cycle is displayed.
min./max./actual Cycle-Time:
Here, the minimum, maximum and current DP cycle time is displayed. Only
those cycles are considered, during which all slaves participated in the data exchange and no repetitions
occurred.
CycleWithNoDxch-Counter:
Increments if not all slaves participate in the data exchange (i.e. have a
DpState not equal 0)
Real Failed-Cycle-Counter:
Increments if the DP cycle was not completed before the next task cycle began
and all the slaves are involved in the data exchange (i.e. have a DpState of 0).
