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Glossary
S
SA85 module
The SA85 module is a Modbus Plus adapter for IBM-AT or compatible computers.
Scan
A scan consists of reading the inputs, processing the program logic and outputting
the outputs.
Section
A section can for example be used to describe the mode of functioning of a
technological unit such as a motor.
A program or DFB consists of one or more sections. Sections can be programmed
with the IEC programming languages FBD and SFC. Only one of the named
programming languages may be used within a section at any one time.
Each section has its own document window in Concept. For reasons of clarity, it is
however useful to divide a very large section into several small ones. The scroll bar
is used for scrolling within a section.
Section Code
Section Code is the executable code of a section. The size of the Section Code is
mainly dependent upon the number of blocks in the section.
Section Data
Section data is the local data in a section such as e.g. literals, connections between
blocks, non-connected block inputs and outputs, internal status memory of EFBs.
Note: Data which appears in the DFBs of this section is not section data.
Separator
Format (4:00001)
The first digit (the reference) is separated from the five figure address that follows
by a colon (:).
Sequence
language (SFC)
The SFC Language Elements enable a PLC program organization unit to be divided
up into a number of Steps and Transitions, which are connected using directional
Links. A number of actions belong to each step, and transition conditions are
attached to each transition.
Serial
Connections
With serial connections (COM) the information is transferred bit by bit.
Source code file
(Concept-EFB)
The source code file is a normal C++ source file. After executing the Library →
Create files menu command, this file contains an EFB-code frame, in which you
have to enter a specific code for the EFB selected. To do this invoke the Objects →
Source menu command.
840 USE 504 00 October 2002
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