Mitsubishi Electric MELCEC Q Series User Manual page 60

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