Address - Mitsubishi MELSEC-Q Series Programming Manual

4.5.2

Address

Address is a format defined in IEC61131-3.
The following table shows details of format that conforms to IEC61131-3.
Start
%
*1: Not supported with the FXCPU.
● Position
● Data size
● Classification
4.5 Device and Address
4-36
4.5.2 Address
Table 4.5.2-1 Address definition specifications
1st character:
2nd character: data size
position
I Input (Omitted)
Q Output X
W
M Internal D
L
Position is a major class indicating the position to
which data are allocated in three types: input,
output, and internal.
The following shows the format rules
corresponding to the device format.
• X, J\X (X device) : I (input)
• Y, J\Y (Y device) : Q (output)
• Other devices : M (internal)
Data size is a class indicating the size of data.
The following shows the format rules corresponding to the device format.
• Bit device : X (bit)
• Word device : W (word), D (double word), L (long word)
Classification is a minor class indicating the type of a device that cannot be identified
only by its position and size.
Devices X and Y do not support classification.
For the format corresponding to the device format, refer to the following section.
Section 4.5.3 Correspondence between devices and addresses
Long words are used in double-precision real operation instructions of the
Universal model QCPU/LCPU.
Bit
Numerics used for detailed
classification
Bit
Use '.' (period) to delimit the
Word (16 bits)
numbers from the subsequent
Double word (32 bits)
numbers.
A period may be omitted.
*1
Long word (64 bits)
3rd character and later:
classification
Example)
%I X0 %MX1 . 863
Position Data Classification Number
size
Number
Number
corresponding to
the device
number (decimal
notation)