Справочник Пользователя для Mitsubishi Electronics Mitsubishi Digital Electronics Video Gaming Accessories FX3G
661
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
29 Data Table Operation – FNC250 to FNC269
29.1 FNC256 – LIMIT / Limit Control
21
FN
C
160
-F
-F
N
C
16
9
R
eal
T
T
im
e C
lock
C
ont
ro
ro
l
22
FN
C
170-
FN
FN
C
179
E
xte
rnal D
evice
23
FN
C
C
180
A
lter
nate
In
st
ru
ct
ions
24
FN
C
181-
FN
FN
C
18
9
O
ther
s
s
25
FN
C
190-
FN
FN
C
199
B
lock D
ata
O
per
ation
ation
26
FN
C2
00
-F
NC
20
20
9
C
ha
racter
S
tring
Co
ntro
ntro
l
27
FN
C
210-
FN
FN
C
21
9
Da
ta
O
per
ati
ati
on 3
28
FN
C
220-
FN
FN
C
249
Da
ta
C
om
par
ison
29
FN
C
25
0-F
N
C
269
D
ata T
abl
e
abl
e
O
per
at
at
ion
30
FN
C
270-
FN
FN
C
274
Ex-
D
D
ev
ice
Inv
ert
ert
er
Com
m
s
29.1
FNC256 – LIMIT / Limit Control
Outline
This instruction provides the upper limit value and lower limit value for an input numeric value, and controls the output
value using these limit values.
value using these limit values.
1. Instruction format
2. Set data
3. Applicable devices
Explanation of function and operation
1. 16-bit operation (LIMIT and LIMITP)
Depending on how the input value (16-bit binary value) specified by
compares to the range between
and
, the output value
is controlled.
The output value is controlled as shown below:
• When controlling the output value using only the upper limit value, set “-32768” to the lower limit value specified in
.
Operand Type
Description
Data Type
Lower limit value (minimum output value)
16- or 32-bit binary
Upper limit value (maximum output value)
Input value controlled by the upper and lower limit values
Head device number storing the output value controlled by the upper and lower limit
values
values
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System User
Special
Unit
Index
Con-
stant
stant
Real
Number
Charac-
ter String
Pointer
X Y M T C S D
.b KnX KnY KnM KnS T C D R U
\G
V
Z Modify K H
E
"
"
P
3
3
3
3
3 3 3 3
3
3
3 3
3
3
3
3
3 3 3 3
3
3
3 3
3
3
3
3
3 3 3 3
3
3
3
3
3
3 3 3 3
3
3
P
FNC 256
LIMIT
D
Mnemonic
Operation Condition
16-bit Instruction
9 steps
LIMIT
LIMITP
LIMITP
Mnemonic
Operation Condition
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
32-bit Instruction
17 steps
DLIMIT
DLIMITP
DLIMITP
Continuous
Operation
Pulse (Single)
Pulse (Single)
Operation
S
1
S
2
S
3
D
S
1
S
2
S
3
D
S
3
S
1
S
2
D
FNC256
LIMIT
S
1
S
2
D
S
3
Input
value
value
Output
value
value
Input
value
value
Output
value
(
)
(
)
Command
input
In the case of “ Lower limit value > Input value” .... Lower limit value
→ Output value
In the case of “ Upper limit value < Input value” .... Upper limit value
→ Output value
In the case of “ Lower limit value
≤ Input value ≤ Upper limit value” .... Input value → Output value
S
1
S
3
S
1
D
S
2
S
3
S
2
D
S
3
S
2
S
3
D
S
1
D
S
2
S
3
S
1
Specified
Specified
S
1