- - - - - - - - - - - - - - - - - - - - MELSEC-A
Table 4.11 Device List (Continued)
Application Range (Number of points)
AO, Al (2)
Data register for storing the operation results of
basic and application instructions.
Used to modify devices
Y, M, l, 8, F, T, C, D, W, R, K, H,
NO to 7 (8 levels)
Indicates the nesting of master controls.
PO to 255 (256)
Indicates the destination of the branch Instruction
(CJ, SCJ, CALL, JMP).
K-32768 to 32767 (16-bit instruction)
Used to specify the timer/counter set value,
pointer number, interrupt pointer number, the
K-2147483648 to 2147483647
number of bit device digits, and basic and
application instruction values.
Used to specify the basic and application
HO to FFFFFFFF (32-bit instruction)
The step relay (8) may be used in the same manner as the internal relay (M). For Instance, the
step relay comes in useful when writing a program which has two function or application, l.e.
the step relay can be used specifically in accordance with the function or application, Inde-
pendently of the internal relay .