Mitsubishi Electric MELSEC FX3U Programming Manual page 377

FX /FX /FX Series Programmable Controllers
3G 3U 3UC
Programming Manual - Basic & Applied Instruction Edition
Comparison points
Make sure that the comparison value 1 and the comparison value 2 have the following relationship:
] ≤ [
[ +1,
S S
1 1
Comparison point
Comparison value 1
Comparison value 2
Operation
When the current value of the high speed counter C251 changes (counts) as shown below, the comparison
result is output to one of the outputs Y000, Y001 or Y002.
M8000
RUN monitor
Comparison pattern
>
S S
1
≤ ≤
S S
1
<
S
Related instructions
The following instructions can be combined with high speed counters:
Instruction
DHSCS
DHSCR
DHSZ
DHCMOV
DHSCT
+1, ]
S S
2 2
Contents (32 bits)
+1,
S S
1 1
S +1, S
2 2
K2,147,483,647
C251
Comparison Comparison
value 1 value 2
FNC 55
K1000 K2000
DHSZ
Current value of C251
1000 >
S
999 → 1000
999 ← 1000
999 → 1000
999 ← 1000
1000 ≤ ≤ 2000
S S
2
2000 → 2001
2000 ← 2001
2000 → 2001
2000 ← 2001
S
2
> 2000
S
FNC No.
FNC 53 High speed counter set
FNC 54 High speed counter reset
FNC 55 High speed counter zone compare
FNC189 High speed counter move
FNC280 High speed counter compare with data table
13 High Speed Processing – FNC 50 to FNC 59
13.6 FNC 55 – HSZ / High Speed Counter Zone Compare
Comparison Output
source destination
C251 Y000 K1000 > C251
K1000 ≤ C251 ≤ K2000
Change of output contact (Y)
Y000 Y001
ON OFF
ON → OFF OFF → ON
OFF → ON ON → OFF
ON → OFF OFF → ON
OFF → ON ON → OFF
OFF
ON → OFF
OFF
OFF → ON
OFF
ON → OFF
OFF
OFF → ON
OFF
OFF OFF
Instruction name
ON
→ Y000
→ Y001
C251 > K2000 → Y002
Y002
OFF
OFF
OFF
OFF
OFF
ON OFF
OFF → ON
ON → OFF
OFF → ON
ON → OFF
ON
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