
B-66234EN/05 11.EXTENDED SYMBOL/COMMENT FUNCTION
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3. Set the data
- sub-program.
Input program number.
- Kind of Ladder
Input Ladder
- SYMBOL
Input symbol
- 1st Comment
- 2nd Comment
- 3rd Comment
- 4th Comment
Input comment
4. Click the <Add> button and add the sub-program.
11.3.8 Notes at Editing Ladder Program
1. Do not create a symbol that can be read as an address.
If you make a symbol such as “X003”, the search/replace
function may not be unable to work properly with “X003”.
2. If two or more symbols are assigned to the same address, the
symbol to be displayed for the address is determined in priority
as follows:
Program Symbol Type Address Priority
P1 Other
ABC BYTE R10 4 2
ZAB DWORD R10 3 1
P1 A_1_P1 WORD R10 1 -
P1 A_2_P1 WORD R10 2 -
In case of different symbols with same address:
(1) Symbol with same program with current program of screen.
Local symbol is preferred to global one.
(2) Symbol of larger data type.
Symbol of DWORD, symbol of WORD and then symbol of
BYTE.
(3) Alphabetical order of symbol name.
Order in ASCII code ignoring their cases.
3. If two or more symbols are assigned to the same address, the
symbols in ladder program may change at de-compilation. Do
not assign two or more symbols to an address.
Program Symbol Type Address
ABC BYTE R10
ZAB DWORD R10
In case of symbol definitions above, the symbol “ABC” used in
the original ladder program will change into “ZAB” at the
de-compilation.
You can check the duplicated address assignment of symbols at
compilation of the ladder program.