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 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
FN
C
30
-FN
C
39
R
otati
on and 
Shi
ft
12
FNC4
0-F
NC4
9
D
ata O
per
ati
on
13
FN
C
50-FN
C
59
H
igh S
pe
ed 
P
rocessing
14
FM
C
60-FN
C
69
H
andy 
In
st
ru
ct
ion
15
FNC7
0-F
NC7
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
10
9
Da
ta
 
Transf
er 2
18
FN
C
110-
FN
C
139
Floati
ng Poi
nt
19
FN
C
14
0-F
N
C
149
Da
ta
 
O
per
at
ion 2
20
FN
C
150-
FN
C
159
Posit
ioning 
C
ont
ro
l
2. Only 32-bit operation instructions are available.
Because instructions for high speed counters are dedicated to 32 bits, make sure to input "DHSCR (FNC 54)".
3. Priority order in operation among HSCS (FNC 53), HSCR (FNC 54), and HSZ (FNC 55) 
instructions for the same high speed counter
→ For details, refer to "6. Priority order in operations among HSCS (FNC 53), HSCR (FNC 54), and HSZ
(FNC 55) instructions for the same high speed counter" in Subsection 13.4.1.
4. Reset operation by an external terminal
→ For details, refer to "5. Reset operation by an external terminal [M8025*1: HSC (external reset) mode]" in
Subsection 13.4.1.
5. Other cautions on using HSCR instruction
→ For details, refer Subsection 13.4.1.
Program example
1. Example of self-reset circuit
When the current value of C255 becomes "400", C255 is immediately reset.  Its current value becomes "0", and the
output contact is set to OFF.
C255
K300
FNC 54
DHSCR
K400
C255
C255
Reset value of DHSCR
400
Count-up value
300
Current value
of C255
Output contact
of C255
Comparison
value
Comparison
source
Output
destination
M8000
RUN monitor