Address - Mitsubishi Electric MELSEC Q Series Structured Programming Manual

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4.5.2

Address

Address is a format defined in IEC61131-3.
The following table shows details of format that conforms to IEC61131-3.
1st character:
Start
position
I
Input
Q
Output
%
M
Internal
*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
● 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
• Word device
● 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.
Table 4.5.2-1 Address definition specifications
2nd character: data size
(Omitted)
Bit
X
Bit
W
Word (16 bits)
D
Double word (32 bits)
L
Long word (64 bits)
: M (internal)
: X (bit)
: W (word), D (double word), L (long word)
3rd character and later:
classification
Numeric characters used for
detailed classification
Use '.' (period) to delimit the
numbers from the subsequent
numbers.
A period may be omitted.
*1
Example)
%I
X0
Position
Data
size
4.5 Device and Address
4.5.2 Address
Number
Number
corresponding to
the device
number (decimal
notation)
4
%MX1 . 863
Classification Number
4-39

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