16
TI 34M6A01-01E
P
P
C
C
L
L
A name suggesting the corresponding action can be assigned to each device to increase
maintainability.
Arbitrary names for individual devices can be used in the programming before the terminal
assignment is decided. The ability to separately determine the logical design and physical
design (i.e., program design and terminal assignment) greatly reduces the engineering
period.
Wiring changes can be accomplished be changing the tag definitions.
Use of tag names helps standardize circuits and enables programs to be reused with ease.
Logical Design by Tag Name
X00021
I00015
X00023
X00022
I00015
Y00056
START
LOCK
SWITCH
KEEP
LOCK
ABOUT
Conventional PLCs require
terminal addresses.
The FA-M3 R allows you to write in
logical addresses (tag names).
z
Tag names can be set easily (see the figure below right);
however, even if the tag names have not yet been set ladder
diagrams can be edited using tag names.
Æ
Even when the terminal assignment has not yet been
decided, programs can be developed using signal
names.
z
Tag names should be up to 8 characters long and begin with 2
alphanumeric characters.
