Mitsubishi Electric MELSEC-Q Series - Address

4.5 Device and Address
4.5.2 Address
4-39
4
PROGRAM CONFIGURATION
4.5.2 Address
Address is a format defined in IEC61131-3.
The following table shows details of format that conforms to IEC61131-3.
Table 4.5.2-1 Address definition specifications
*1: Not supported by FXCPU.
● Position
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
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
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.
Start
1st character:
position
2nd character: data size
3rd character and later:
classification
Number
%
I Input
(Omitted) Bit
Numeric characters used for
detailed classification
Use '.' (period) to delimit the
numbers from the subsequent
numbers.
A period may be omitted.
Number
corresponding to
the device
number (decimal
notation)
Q Output X Bit
M Internal
W Word (16 bits)
D Double word (32 bits)
L
Long word (64 bits)
*1
Example)
X0%I %MX1 . 863
PositionData
size
Classification
Numbe
r