Siemens SM2 monitoring system 用户手册
U3585-J-Z125-8-76
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10 Appendix
10.1 SDF syntax description
This syntax description is based on SDF Version 4.1A. The syntax of the SDF command/
statement language is explained below in three tables.
statement language is explained below in three tables.
Table 9: Metasyntax
Command and statement formats use certain characters and forms of representation; their
meanings are described in Table 9.
meanings are described in Table 9.
Table 10: Data types
Variable operand values are represented in SDF by means of data types. Each data type
represents a certain set of values. The number of data types is limited to the data types
described in Table 10.
represents a certain set of values. The number of data types is limited to the data types
described in Table 10.
The description of data types is valid for all commands and statements, and operand
descriptions describe only the deviations from Table 10.
descriptions describe only the deviations from Table 10.