Siemens MOBY FC 56 Technical Description page 78

Sample Applications
Dynamic operation
With this mode, MDSs can enter or leave the transmission field at all times. The
programming sequence is shown below.
ANZ_presence_change
MDS_Present?
Process first MDS in
sub_command = 00)
Remarks:
This method can also be used with static operation. However, remember that MDS
processing takes longer since the GET command must be executed for each MDS.
5-16
No
= 1
Yes
GET
No
Yes
UDT 200.
END (with
Scan whether the number of MDSs
in the field has changed.
Scan UID. The ANZ_presence_change
bit is automatically reset.
After the last MDS leaves the field, a
branch is made here to "No."
Only one MDS is processed. If
there are several MDSs in the
field, processing is done in the
next program loop.
END turns the MDS off. If there
are more MDSs in the field, the
ANZ_presence_change bit is al-
ways set so that the other MDSs
can be processed in subsequent
program loops.
J31069-D0155-U001-A0-7618
FC 56