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3-6
3.2.3 Using double word data (32 bits)
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.
(1) When Using Bit Devices
(a) 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
" ". For link direct devices, designation
is done by
"J \ ". 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:
Fig 3.4 Digit Designation Setting Range for 32-Bit Instructions
(b) In cases where digit designation has been made at the source (S) , the numeric values
shown in Table 3.2 are those which can be dealt with as source data.
Table 3.2 List of Numeric Values that Can Be Dealt with as Digit Designation
• K1X0 ...... The 4 points X0 to X3 are
designated.
• K5X0...... The 20 points X0 to X13 are
designated.
• K2X0 ...... The 8 points X0 to X7 are
designated.
• K6X0...... The 24 points X0 to X17 are
designated.
• K3X0 ...... The 12 points X0 to XB are
designated.
• K7X0...... The 28 points X0 to X1B are
designated.
• K4X0 ...... The 16 points X0 to XF are
designated.
• K8X0...... The 32 points X0 to X1F are
designated.
Number of Digits
Designated
With 32 Bit Instructions
Number of Digits
Designated
With 32 Bit Instructions
K1 (4 points)
0 to 15
K5 (20 points)
0 to 1048575
K2 (8 points)
0 to 255
K6 (24 points)
0 to 16777215
K3 (12 points)
0 to 4095
K7 (28 points)
0 to 268435455
K4 (16 points)
0 to 65535
K8 (32 points)
2147483648 to 2147483647
Number of digits Head number of bit device
Network No. Number of digits Head number of bit device
X1F X1C X1B X18 X17 X14 X13 X10 XF XC XB X8 X7 X4 X3 X0
K1
designation
range
(4 points)
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)
K8 designation range
(32 points)