Siemens MOBY FC 56 Technical Description page 81

Entry/Exit Check of an MDS in an SLG
Field
This section describes various ways of detecting the presence of an MDS in the
transmission window of an SLG. The user can select the most suitable method for
the application using the parameter "MDS_IO_control." See chapter 3.1.
Table 6-1
MDS_IO_
control
0
1
1
4
1
5
1 These MDS_IO_control settings are not suitable for multitag operation. In this case, make
sure that multitag = 1 is set.
FC 56
J31069-D0155-U001-A0-7618
Entry/exit checking of an MDS
Recognition of
an MDS Command
Scan field. Mandatory
(ANZ_MDS_
present in BEST
is available to
the user for
scanning.)
User program: Yes, but not
Limit switch or mandatory
ANZ_MDS_
present bit in
BEST
User program: Yes, but not
Limit switch or mandatory
ANZ_MDS_
present bit in
BEST
User program: No
Limit switch or
ANZ_MDS_
present bit in
BEST
NEXT MDS
Flow Control
Continuous
monitoring via
the filehandler
Not continuous
Not continuous
Not continuous
6
Command
Processing
Command intermediately
stored by the filehandler
until a permissible MDS
enters the transmission
window of the SLG.
Operating mode with
timeout. Command is
executed immediately.
An error message is
generated if no MDS is
located in the
transmission window.
Command intermediately
stored by the filehandler
until a permissible MDS
enters the transmission
window of the SLG.
Command intermediately
stored by the filehandler
until a permissible MDS
enters the transmission
window of the SLG.
(Test operation)
6-1