Programming language
I
The
AIS
can be programmed in either a relay symbol language( a.k.a. ladder logic
or ladder mode) or a logic symbolic language(a.k.a. instruction list or list mode).
The relay symbol language is based on relay symbol representations and allows
any ladder to be programmed a form which is very similar to relay control sequence
ladder.
The logic symbolic language is based on the assembly language, one
of
the
languages used to write microcomputer programs, and represents any program in
the instruction, source, and destination parts.
Any program written in either language is stored into the memory of the
PLC
after it
has
been converted into the machine language. This conversion process is
performed by the programming device used for programming the
PLC.
Relay
Symbolic
Language
0
LDX3
1 ORX4
2
OR X5
3
OUT
Y33
4 LD X5
SANDMI1
6 OR1 X6
7
OUT
Y34
8
END
Logic
Symbolic
Language
73
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