371
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
13 High Speed Processing – FNC 50 to FNC 59
13.5 FNC 54 – HSCR / High Speed Counter Reset
11
FNC3
0-F
NC3
9
R
otati
on and
Shif
t
12
FNC4
0-F
NC4
9
D
ata
O
per
ati
on
13
FN
C
50-FN
C
59
H
igh Speed
Pr
ocess
ing
14
FM
C
60-
FN
C
69
H
andy
In
st
ru
ct
ion
15
FNC7
0-F
N
C7
9
Ex
ter
nal
FX
I/O
D
evice
16
FN
C
80-FN
C
89
Ext
ernal FX
De
vic
e
17
FN
C
100-
FN
C
109
Da
ta
Transf
er 2
18
FN
C
110-
FN
C
139
Fl
oati
ng Poi
nt
19
FN
C
140
-F
N
C
14
9
Da
ta
O
per
ati
on 2
20
FN
C
150-
FN
C
159
Posit
ioning
C
ontr
ol
13.5
FNC 54 – HSCR / High Speed Counter Reset
Outline
This instruction compares the value counted by a high speed counter with a specified value at each count,
and immediately resets an external output (Y) when both values become equivalent to each other.
1. Instruction format
2. Set data
3. Applicable devices
S
1: "D
.b" is available only in FX
3U
and FX
3UC
PLCs. However, index modifiers (V and Z) are not available.
S
2: The same counter as
can be specified also. (Refer to the program example shown later.)
S
3: This function is supported only in FX
3U
/FX
3UC
PLCs.
Explanation of function and operation
1. 32-bit operation (DHSCR)
When the current value of a high speed counter (C235 to C255) specified in
becomes the comparison
value [
+1,
] (for example, when the current value changes from "199" to "200" or from "201" to
"200" if the comparison value is K200), the bit device
is reset (set to OFF) regardless of the operation
cycle. In this instruction, the comparison processing is executed after the counting processing in the high
speed counter.
Operand Type
Description
Data Type
Data to be compared with the current value of a high speed counter or word
device number storing the data to be compared
32-bit binary
Device number of a high speed counter [C235 to C255]
32-bit binary
Bit device number to be reset (set to OFF) when both values become equivalent
each other.
Bit
Oper-
and
Type
Bit Devices
Word Devices
Others
System User
Digit Specification
System
User
Special
Unit
Index
Constant
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
S
3
3
3
3
3
3
3
3 3
3
S
1
S
2
3
Mnemonic
Operation Condition
32-bit Instruction
13 steps DHSCR
Continuous
Operation
16-bit Instruction
Mnemonic
Operation Condition
−
FNC 54
HSCR
D
S
1
S
2
D
S
1
S
2
D
S
2
S
2
S
1
S
1
D
=
→
Reset.
Comparison
value
Comparison
source
Output
destination
S
1
S
2
D
K2,147,483,647
FNC 54
DHSCR
S
2
S
1
D
S
2
Command
input