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MELSEC-Q/QnA
5 SEQUENCE INSTRUCTIONS
High Performance
QnA Q4AR
Basic
QCPU
PLC CPU
Process CPU
5.4 Shift Instruction
5.4.1 Bit device shift (SFT, SFTP)
Usable Devices
Internal Devices
(System, User)
MELSECNET/10(H)
Direct J
\
Other
Set
Data
Bit Word
File
Register
Bit Word
Special
Function
Module
U
\G
Index
Register
Zn
Constant
K, H
DY
D
(Other than TC)
[Instruction Symbol] [Execution Condition]
Shift command
Shift command
SFTP
SFT
D
SFT
D
SFTP
[Set Data]
Set Data Meaning Data Type
D
Number of device to shift Bit
[Functions]
(1) When bit device is used
(a) Shifts to a device designated by
D
the ON/OFF status of the device immediately prior to
the one designated, and turns the prior device OFF.
For example, if M11 has been designated by the SFT instruction, when the SFT instruction
is executed, it will shift the ON/OFF status of M10 to M11, and turn M10 OFF.
(b) Turn the first device to be shifted ON with the SET instruction.
(c) When the SFT and SFTP are to be used consecutively, the program starts from the device
with the larger number.
M0
Shift input
M14
SFTP
First device to shift
1
00
M15
M14
0
M13
0
M12
0
M11
1
M10
1
M9
0
M8
M13SFTP
M12SFTP
M11
SFTP
M10SET
7
0010 0 0 1 0
2
0000 1 0 1 0
3
0001 0 0 1 0
4
0001 0 1 1 0
5
0010 1 0 1 0
6
1001 0 0 1 0
Shift range
X02 ON
After first shift input
After second shift inpu
X02 ON
After third shift input
After fourth shift input
After fifth shift input
X2
At M8 to 16, "1" indicates ON and "0"
indicates OFF.
0
0
0
0
0
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