Mitsubishi Electric MELCEC Q Series - Page 60

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CPU MODULE4.
REMARK
The step relay in the list above can be used in the same manner as the internal
relay (M). For the program creation with two kinds of functions in one program,
it is usable to divide the step relay (S) and internal relay (M) into a category of
such as a function and usage in using.
Device list (continued)
Device
Range of Usage (points)
Description of Device
QCPU-A
D
Data register D0 to D8191 (8192 points) Memory used to store data in a programmable controller
Special register D9000 to D9255 (256 points) Data memory set up in advance for the special application
W Link register W0 to W1FFF (8192 points)
Register for a data link.
The range not set by the link parameters can be used as a
substitute for a data register.
R *File register R0 to R8191 (8192 points)
Used for expanding the data register. User memory area is used
for this.
A Accumulator A0, A1 (2 points)
Data register used to store a operation result of basic and
application instructions
Z
V
Index register V,V1 to V6,Z,Z1 to Z6(14 points)
Used for qualification of devices (X, Y, M, L, B, F, T, C, D, W, R, K,
H, P)
N Nesting N0 to N7 (8 levels) Indicates nesting structure of a master control.
P Pointer P0 to P255 (256 points)
Indicates destination of the branch instructions (CJ, SCJ, CALL,
JMP).
I Interrupt pointer I0 to I31 (32 points)
When an interruption is generated, it shows the destination of the
interrupt program corresponding to the interruption.
K Decimal constant
K-32768 to K-32767 (16-bit instruction)
K-2147483648 to K-32767 (32-bit instruction)
Used to set timer/counter, pointer number, interrupt pointer number,
bit device digits, and values for basic and application instructions.
H Hexadecimal
H0 to HFFFF (16-bit instruction)
H0 to HFFFFFFFF (32-bit instruction)
Used to the set values for basic and application instructions.