Westermo FD-20 - Manual (Page 21)

21 6630-2220
Note 2: The sequence of the modules in the configuration list (lower list) is important
and must be identical to the actual slave.Typically, the sequence follows the
actual physical sequence.There are slaves to which this rule does not apply.
For instance analogue modules must be entered before digital modules.
Note 3: The DP slaves utilize the Watchdog Control setting in order to detect
communication errors to the assigned DP Master.When the DP slave detects
a break in an established connection, defined by a watchdog timeout, the slave
carries out an independent reset and puts all the outputs into a secure condi-
tion.
Caution:When the Watchdog Control has been deactivated, it is possible
that the outputs are not securely reset by the slave if the connection is lost.
Note 4: Activate Device in actual configuration must be selected. If not, no data
exchange will occur from the bus to this slave.
Figure 10: Slave configuration