Using Double Word (32 Bits) Data - Mitsubishi Electric MELSEC-Q/L Programming Manual

Using double word (32 bits) data

Double word data is 32-bit numerical data used by basic instructions and application instructions.
The two types of double word data that can be dealt with by CPU module are as follows:
• Decimal constants: K-2147483648 to K2147483647
• Hexadecimal constants: H00000000 to HFFFFFFFF
Word devices and bit devices designated by digit designation can be used as double word data.
For direct access input (DX) and direct access output (DY), designation of double word data is not possible by digit
designation.
When Using Bit Devices
Digit designation can be used to enable a bit device to deal with double word data.
Digit designation of bit devices is done by designating "[Number of digits][Head number of bit device]".
(For link direct devices, designation is done by "J[Network No.]\[Number of digits][Head number of bit device]". When X100 to
X11F are designated for Network No.2, it is done by J2\K8X100.) Digit designation of bit devices can be done in 4-point (4-bit)
units, and designation can be made for K1 to K8.
For example, if X0 is designated for digit designation, the following points would be designated:
• K1X0  The 4 points X0 to X3 are designated.
• K2X0  The 8 points X0 to X7 are designated.
• K3X0  The 12 points X0 to XB are designated.
• K4X0  The 16 points X0 to XF are designated.
• K5X0  The 20 points X0 to X13 are designated.
• K6X0  The 24 points X0 to X17 are designated.
• K7X0  The 28 points X0 to X1B are designated.
• K8X0  The 32 points X0 to X1F are designated.
X1F X1C X1B X18 X17 X14 X13
K8 designation range
In cases where digit designation has been made at the source (S), the numeric values shown in the following table are those
which can be dealt with as source data.
Number of digits designated
K1 (4 points)
K2 (8 points)
K3 (12 points)
K4 (16 points)
X10 XF XC XB X8 X7 X4 X3
K2 designation
range
(8 points)
K3 designation range
(12 points)
K4 designation range
(16 points)
K5 designation range
(20 points)
K6 designation range
(24 points)
K7 designation range
(28 points)
(32 points)
With 32-bit instructions
0 to 15
0 to 255
0 to 4095
0 to 65535
X0
K1
designation
range
(4 points)
Number of digits designated
K5 (20 points)
K6 (24 points)
K7 (28 points)
K8 (32 points)
3 CONFIGURATION OF INSTRUCTIONS
With 32-bit instructions
0 to 1048575
0 to 16777215
0 to 268435455
-2147483648 to 2147483647
3.2 Designating Data
3
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