4. AnSHCPU MODULE
4 - 10
MELSEC-
Table 4.3 Devices (Continued)
Device Application range (Number of points) Explanation
P Pointer P0 to P255 (256 points)
Indicates the destination of branch instructions (CJ, SCJ, CALL,
JMP).
I
Pointer for
interruption
I0 to I31 (32 points)
Indicates an interrupt program corresponding to the interrupt
source.
K Decimal constant
K-32768 to 32767
(16-bit instruction)
K-2147483648 to 2147483647
(32-bit instruction)
Used to specify the timer/counter set value, pointer number,
interrupt pointer number, the number of bit device digits, and
basic and application instruction values.
H
Hexadecimal
constant
H0 to FFFF (16-bit instruction)
H0 to FFFFFFFF (32-bit instruction)
Used to specify the basic and application instruction values.
REMARK
The step relay (S) may be used in the same manner as the internal relay (M). The step relay is useful
when writing a program which has two functions or applications, i.e., the step relay can be used
specifically in accordance with the function or application, independently of the internal relay.
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