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FX3S/FX3G/FX3GC/FX3U/FX3UC Series
Programming Manual - Basic & Applied Instruction Edition
11 Rotation and Shift Operation – FNC 30 to FNC 39
11.6 FNC 35 – SFTL / Bit Shift Left
11
FNC30-FNC39
Rotation and
Shift
12
FNC40-FNC49
Data Operation
13
FNC50-FNC59
High-Speed
Processing
14
FMC60-FNC69
Handy
Instruction
15
FNC70-FNC79
External FX I/O
Device
16
FNC80-FNC89
External FX
Device
17
FNC100-FNC109
Data
Transfer 2
18
FNC110-FNC139
Floating Point
19
FNC140-FNC149
Data
Operation 2
20
FNC150-FNC159
Positioning
Control
11.6 FNC 35 – SFTL / Bit Shift Left
Outline
This instruction shifts bit devices of the specified bit length leftward by the specified number of bits.
After shift, the bit device is transferred by "n2" bits from the least significant bit.
1. Instruction format
2. Set data
*1. Do not set a negative value to the number of bits to be shifted leftward.
3. Applicable devices
S1: "D.b" is available only in FX3U and FX3UC PLCs. However, index modifiers (V and Z) are not available.
S2: This function is supported only in FX
3G/FX3GC/FX3U/FX3UC PLCs.
Explanation of function and operation
1. 16-bit operation (SFTL and SFTLP)
For "n1" bits (shift register length) starting from , "n2" bits are shifted leftward ([1] and [2] shown below).
After shift, "n2" bits from are transferred to "n2" bits from ([3] shown below).
Operand Type Description Data Type
Head bit device number to be stored to the shift data after leftward shift Bit
Head bit device number to be shifted leftward Bit
n1 Bit length of the shift data n2 ≤ n1 ≤ 1024 16-bit binary
n2
Number of bits to be shifted leftward n2 ≤ n1 ≤ 1024
*1
16-bit binary
Oper-
and
Type
Bit Devices Word Devices Others
System User Digit Specification System User
Special
Unit
Index
Con-
stant
Real
Number
Charac-
ter String
Pointer
XYMTCSD.b
KnX KnY KnM KnS
TCDRU\G V Z Modify K H E ""P
S1
n1
n2 S2
S
P
FNC 35
SFTL
16-bit Instruction
9 steps
Mnemonic Operation Condition
Continuous
Operation
Pulse (Single)
Operation
SFTL
SFTLP
−
−
Mnemonic Operation Condition
32-bit Instruction
S
D
S
D
D
S
D
+8
+2
n2 (in the case of "n2=3")
n1 (in the case of "n1=9")
[1]
Overflow (data to
be deleted)
+1
D
+7 +6
+5
D
+4 +3 +8
D
+7 +6
+5 +4 +3 +2
D
+1
to +5 before shift (n2=3)
D
[3] Copy
[2]
"n2" bits are
shifted rightward
(n2=3).
+2 to before shift (n2=3)
S
+2 +1
Before
execution
After
execution
S
S
S
D
D
D
D
D
D
D
S
D
D
D
D
D
D
D
D
Command
input
FNC 35
SFTLP
n1 n2D
S