Siemens SIMATIC S5-90U System Manual page 273

S5-90U/S5-95U
You can use the following flowchart to check your DB1 with regard to syntax conventions. In a
correct DB1 syntax, start ID, block IDs, parameter names, arguments, block end IDs and end
symbols appear in the sequence and form described in the flowchart.
Start ID
e.g. DB1
_
Block ID
e.g. OBA:
_
Parameter name
e.g. AI
_
Argument
e.g. 1
_
Block end ID
;
_
End symbol
END
_
_ stands for one or more fillers. Fillers can either be blanks or commas.
EWA 4NEB 812 6115-02b
Start ID:
• DB1 must always start with the start ID.
• The start ID is always "DB1_".
• Please note that the start ID must be terminated by at
least one filler (blank or comma).
Block ID:
• A block ID is always preceded by the start ID or a block
end ID.
• The block IDs for the individual parameter blocks are
listed in Table 9-14.
• Please note that the block ID must be terminated by ":"
and at least one filler.
Parameter name:
• A parameter name is always preceded by a block ID or
another parameter (parameter name and arguments).
• For specific parameter names refer to the Tables in
Appendix B.2.
• Please note that a parameter name is always terminated
by at least one filler.
Argument:
• An argument is always preceded by a parameter name
or another argument.
• For value ranges of arguments refer to the Tables in
Appendix B.2.
If a parameter name requires several arguments, the
prescribed order is also stated in the Tables in Appendix
B.2.
• Please note that an argument is always terminated by at
least one filler.
Block end ID:
• A block end ID is always preceded by an argument or a
block ID.
• The block end ID is always ";"_.
• Please note that the block end ID is always terminated
by at least one filler.
End symbol:
• The end symbol is always preceded by a block end ID.
• The block end ID is always "END_".
• Please note that the block end ID is always terminated
by at least one filler.
Integrated Blocks and Their Functions
9-29