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Indicates the instruction execution target module. If one instruction is to be executed in two or more modules, applicable
modules are indicated using icons.
Module
Serial communication
Modem interface
CC-Link
CC-Link IE Controller Network
CC-Link IE Field Network
MELSECNET/H
Ethernet
Written formats in the structured ladder/FBD and structured text language.
Indicates the instruction name and executing condition of the instruction.
Executing
condition
Symbols on the
corresponding page
Indicates the names of input and output arguments, and the data type of each argument. For details of each data type, refer
to the following.
MELSEC-Q/L/F Structured Programming Manual (Fundamentals)
Devices that can be used in the instruction are marked with .
The following table shows applicable classification for usable devices.
Device
Internal device (system,
classification
user)
Bit
*1
Usable device
X, Y, M, L,
SM, F, B, SB,
FX, FY
*1 For description of each device, refer to the User's Manual (Function Explanation, Program Fundamentals) of the CPU module currently
being used.
*2 FX and FY can be used in bit data only, and FD can be used in word data only in the PID control instruction.
*3 T, ST, and C can be used in word data only (cannot be used in bit data).
*4 These devices can be used in CC-Link IE, MELSECNET/H, and MELSECNET/10.
*5 The Constant and Others columns describe settable devices.
*6 Link direct devices (J\) cannot be used for LCPU.
Indicates the processing performed by the instruction.
Indicates data such as control data, send data or receive data, that are used for an input argument or output argument in an
instruction.
The setting side indicates the following:
• User : Data set by user before dedicated instruction execution
• System : Data stored by the programmable controller CPU after dedicated instruction execution. The setting does not need
to be set by the user. If the setting is set by the user, data cannot be read normally.
Indicates the program examples of structured ladder/FBD/ST.
4 HOW TO READ INSTRUCTIONS
32
Non-conditional
Executed while ON
execution
No symbol
File
register
R, ZR
Word
*3
*3
T
, ST
,
R, ZR
*3
C
, D, W,
*2*2
SD, SW,
*2
FD
, @
Icon
Module
Built-in Ethernet port QCPU
Serial
High-speed Universal model QCPU
Modem
LCPU
CC-Link
Universal model QCPU
CC IE C
High Performance model QCPU
CC IE F
Process CPU
NET/H
Redundant CPU
Ether
Executed once at
ON
Link direct device
*4*6
J\
Bit
Word
J\X
J\W
J\Y
J\SW
J\B
J\SB
Executed while
OFF
Intelligent
Index
Constant
function
register Zn
module
U\G
U\G
Z
K, H, E, $,
Icon
QnUDE(H)
QnUDV
LCPU
Universal
High
performance
Process
Redundant
Executed once at
OFF
*5
*5
Others
P, I, J, U, DX,
DY, N, BL,
TR, BL\S, V
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