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Chapter One PLC Interface Display
65
V
o
lume II
Operatio
n
divides into three types: the only one ladder diagram in operating, the rest of 15 ladder diagrams
other than the operation of the ladder diagram 0—15 and the other ladder diagrams for compiling
and reference (Any two numbers can be identified or named other than 0-15).
(2) The value of the system is set by bit parameter 53#0~#3 when the power is turned on
initialization, which is the composed parameter of binary system; the No. 0 ladder diagram is
used when this value is set to 0; when this value is set to 1~15, the No. 1~15 ladder diagrams
are then used. The ladder diagram file for loading some one number is called operation file (this
operation may cause hazard; it is enabled after restarting when the power is turned off). This
file may be deleted to rebuild if the format is incorrect. So, the user should carefully specify the
file name of the ladder diagram. The overall file names of the ladder diagram must be
“ladderXX.grp” (XX is number), otherwise, the files may not be identified by the system. The file
format is described by the system, the user can not modify it without the system; otherwise, it
may be deleted or can not be identified.
(3) M6 is separately called the macro program from O91000 to O91015 when the 0~15 ladder
diagrams are used.
(4) The selection of the ladder diagram. The file name can be specified by moving the cursor or
inputting the “LX”/“LXX” (X/XX is number). The system may detect whether the X”/“XX is the
known file name by pressing the “input” key. If it does not detect, the ladder diagram file should
be set up based upon the file name “ladder0X.grp” or “ladderXX.grp”. The system may
automatically generate two function blocks “END1” and “END2” when the new file is set up, so
that the user can consecutively operate this ladder diagram file (The command table remains
null if it is converted after opening the file). User can copy or cut the ladder diagram from the
normal file (it can not exceeds 100 rows, otherwise, only the previous 100 rows can be
performed) pasting to other file, then copy the function (without modification), and then set up a
new file. For safety’s sake, after the ladder diagram is compiled, the current file may
automatically stored when another file is opened; the ladder diagram syntactic may be detected
before storing of which it may give up if the incorrect syntax is found.
(5) The file header includes the basis information of the file such as the line number and step
number, wherein, the step information occurs as long as it is converted, otherwise, it always
keeps the opening information. User can delete the unopened and unoperated ladder diagram
file; this operation is the irreversible operation, so user should be careful. The system may stop
the renewal of the ladder diagram network after the user open the unoperated ladder diagram,
in order to avoid the misguidance. The operating ladder diagram can only be stored and copied,
so that user can copy this information to others ladder diagram files. It is better to stop the
operation before compiling the current ladder diagram. When the cursor stops at the
background compiling file, user can open the Info information to modify the compiling file
background (including the ladder diagram version number, suitable machine and ladder
