Features Tab; Fig. 35 Features Tab - Beckhoff FC3102 Documentation

FC310x as master
Sync/Freeze: In operation mode DP/MC (equidistant) of the master, slaves can be operated with Sync and
Freeze [} 15].
DPV1 Class 2: With FC310x, a DPV1 class 2 connection to a DPV1 slave can be activated. This is a good
idea, for example, if the DP slave is in data exchange with another master, but should nevertheless be
addressed acyclically by TwinCAT. The class 2 connection monitoring time is set via the timeout parameter
(see chapter DPV1 [} 31]).
DP Class 2: "No Cyclic Connection" or "ReadOnly" should be selected under DP class 2, if the DP slave is in
data exchange with another master, but should nevertheless be addressed acyclically by TwinCAT, or the
DP inputs and outputs should be read cyclically. If "ReadOnly" is selected, then the modules are to be
selected as in the case of the normal cyclic connection. They all, however, appear in the TwinCAT system
with input variables, regardless of whether they are in fact input or output modules (ReadOnly only as from
firmware version 3.00).
ResetSlave: With this button, provided TwinCAT has been started, cyclic data exchange with the DP slave
can be disabled and re-established immediately (corresponds to a IO reset but only for the one slave).
3.9.2

Features tab

Fig. 35: 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 [} 14]).
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 [} 14] chapter).
FC3101 and FC3102 Version: 3.0 59