ASCII Driver
S5-95U, Second Serial Interface
ASCII parameter set (PAR)
The principle of operation of the ASCII driver can be parameterized in the ASCII parameter set.
You specify the following in DB1:
•
Data block/flag byte in which the parameter set should lie (in the DBx, from DW y onwards) and
•
all parameters of the set ( Table 4-2).
Access to parameterization data ( Figure 4-8):
•
The DB1 interpreter defines the parameters
”
PAR
”
,
”
SF
”
,
”
EF
”
,
”
KBS
”
,
”
KBE
”
and
”
MOD
”
in the system data from system data word 48 onwards ( Appendix B).
•
The DB1 interpreter defines the parameters of the set from DW y onwards of the DBx defined in
the system data.
•
The ASCII driver in the operating system of the PLC accesses the parameterization data as
described in Figure 4-3.
Section 4.5 describes an example DB1 and the corresponding parameter set DB.
Figure 4-8 Access to the Parameter Assignment Data for the ASCII Driver
Parameter set
Transfer
cyclically every 100 ms
Transfer when
• PLC POWER-ON or
• DB1 change to the
parameter set or
• mode change
Storage in the PLC
• STOP RUN or
• POWER-ON-RUN
DB1
Position of the parameter
set
DW y
DBx
System data
SD 48
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a
ASCII
driver
in the
operating
system
...
ASC:
PAR DBxDWy
...
BDR xxxx ...
4-12
EWA 4NEB 812 6095-02
