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T1/T1S User’s Manual
6. Programming Information
6.7 Programming language
The programming language of the T1/T1S is ‘ladder diagram’.
Ladder diagram is a language which composes program using relay symbols as a base
in an image similar to a hard-wired relay sequence. In the T1/T1S, in order to achieve an
efficient data-processing program, ladder diagram which are combinations of relay
symbols and function blocks are used.
The ladder diagram program is constructed by units called ‘rung’. A rung is defined as
one network which is connected each other.
The rung numbers are a series of numbers (decimal number) starting from 1, and cannot
be skipped. There is no limit to the number of rungs.
The size of any one rung is limited to 11 lines
´
12 columns.
A example of a ladder diagram program is shown below.
When X005 is ON or the data of D0100 is greater than 200, Y027 comes ON.
Y027 stays ON even if X005 is OFF and the data of D0100 is 200 or less.
Y027 will come OFF when X006 comes ON.
RungRung number
1
2
3
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