Features tab

Data_Exchange Poll Rate: For each slave a different polling rate (divider) can be set. Divider 1 means that the slave is polled in each cycle, Divider 2 means every second cycle, etc. The Modulo parameter can be used to allocate slaves with divider greater than 1 to different cycles, in order to reduce the maximum cycle time (Divider 2 and Modulo 0 means that the slave is polled in each even cycle, Divider 2 and Modulo 1 means that the slave is polled in each odd cycle) (see chapter Slave prioritization/several DP cycles).

Additional Data_Exchange Samples: It is possible to run a number of DP cycles within one task cycle. It is then optionally possible for each slave to be supplied with different output data in each DP cycle, and for the input data from each of those DP cycles to be transferred to the controller. In this case, there is an individual set of variables for each DP cycle (see the Slave Prioritization/Multiple DP Cycles chapter).

NoAnswer-Reaction: You can specify, for each slave, whether it should remain in the Data Exch, despite responding incorrectly or not at all. In this case (Stay in Data-Exch), data exchange is only exited if the slave has never responded correctly within the address monitoring time (provided the watchdog (see the box's Profibus tab) is activated, otherwise data exchange is only terminated once the slave has not responded correctly 65535 times) (see the Error Reactions chapter).

Restart-Behaviour: It is possible to specify for each slave whether, after leaving Data-Exch, it should automatically start up again, or should remain in the Wait-Prm state (see chapter Error Reactions).

Reaction of the Master: You can specify for each slave, whether its exit from Data-Exch should cause the PROFIBUS cycle to stop (all slaves abandon data exchange and go into Wait Prm mode, restart after IO reset or TwinCAT system restart) (see chapter Error Reactions).

Changes of the Input Data: For each slave it can be specified whether, on exiting of Data Exch (DpState not equal 0), its input data should be set to 0 or remain unchanged (see chapter Error Reactions).

acyclic Services: The number of parallel ADS services to one box can be set here.