Справочник Пользователя для Mitsubishi Electronics Mitsubishi Digital Electronics Video Gaming Accessories FX3G
117
FX
3G
/FX
3U
/FX
3UC
Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
4 Devices in Detail
4.8 High Speed Counter [C] (FX3G PLCs)
1
In
trodu
ct
ct
ion
2
O
ver
vi
ew
3
In
st
ru
ct
ion
Li
st
4
D
evices
in D
etail
etail
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Specifi
ed t
he
he
D
evice &
C
onst
ant
ant
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Bef
ore
ore
Pr
ogr
am
am
m
ing
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B
asic
In
st
ru
ct
ion
8
FNC0
0-F
0-F
NC0
9
Pr
ogr
am
Flow
am
Flow
9
FN
C
C
10-FN
C
19
Mo
ve
ve
&
Co
mp
are
are
10
FNC2
0-F
0-F
NC2
9
Ar
ith.
&
&
Logic
O
per
ati
ati
on
4.8.2
Input assignment for high speed counters
Inputs X000 to X007 are assigned as shown in the table below according to each high speed counter number.
When a high speed counter is used, the filter constant of a corresponding input number in the main unit automatically
changes (X000, X001, X003 and X004: 10
When a high speed counter is used, the filter constant of a corresponding input number in the main unit automatically
changes (X000, X001, X003 and X004: 10
µs, X002, X005, X006 and X007: 50 µs). Input terminals not used for high
speed counters, however, can be used as general inputs.
→ For the input specifications of the main unit, refer to the Hardware Edition of the main unit.
U: Up-counting input
D: Down-counting input
A: A phase input
B: B phase input
R: External reset input
S: External start input
Restriction to overlap input numbers
• Inputs X000 to X007 are used for high speed counters, input interrupt, pulse catch, SPD/ZRN/DSZR instructions
and general-purpose inputs. When assigning functions, there should be no overlap between those input terminals.
For example, when C251 is used, X000 and X001 are occupied. As a result, "C235, C236, C241, C244, C246,
C247, C249, C252 and C254", "input interrupt pointers I000 and I101", "pulse catch contacts M8170 and M8171"
and "SPD, ZRN and DSZR instructions using X000 and/or X001" cannot be used.
For example, when C251 is used, X000 and X001 are occupied. As a result, "C235, C236, C241, C244, C246,
C247, C249, C252 and C254", "input interrupt pointers I000 and I101", "pulse catch contacts M8170 and M8171"
and "SPD, ZRN and DSZR instructions using X000 and/or X001" cannot be used.
Counter No.
Input terminal assignment
X000
X001
X002
X003
X004
X005
X006
X007
1-phase
1-count
input
C235
U/D
C236
U/D
C237
U/D
C238
U/D
C239
U/D
C240
U/D
C241
U/D
R
C242
U/D
R
C243
U/D
R
C244
U/D
R
S
C245
U/D
R
S
1-phase
2-count
input
C246
U
D
C247
U
D
R
C248
U
D
R
C248(OP)
U
D
C249
U
D
R
S
C250
U
D
R
S
2-phase
2-count
input
C251
A
B
C252
A
B
R
C253
A
B
R
C253(OP)
A
B
C254
A
B
R
S
C254(OP)
A
B
C255
A
B
R
S