dieu khien logic2
TRANSCRIPT
-
7/31/2019 Dieu Khien Logic2
1/15
10/24/2012
1
Chng IITng hp v phn tch mch
logic tun t
1
Quick introduction
2
-
7/31/2019 Dieu Khien Logic2
2/15
10/24/2012
2
Solution
3
What would it happened ?
4
-
7/31/2019 Dieu Khien Logic2
3/15
10/24/2012
3
TIMERS AND COUNTERS
5
Motor control
6
-
7/31/2019 Dieu Khien Logic2
4/15
10/24/2012
4
Counter explain
7
Instruction list
8
-
7/31/2019 Dieu Khien Logic2
5/15
10/24/2012
5
INFORMATION ONMITSUBISHI REGISTERS
Numeric Designations of registers M100 - 177 general M200 - 277 general M300 - 377 retentive (battery back up) D700 to 777 are data registers.
A register may be thought of a s a bank of elements (called auxiliary relays)which are on or off.
In our case there are 16 in each bank. Each bank starts with a numberending in zero e.g. M160 and ends with a number ending in 5 e.g. M175.
Each element may be addressed and used individu ally and used forflagging operations. These may also be thought of as bits in a binary code.
If a bank is addressed (e.g. M160) then you cannot address individualelements in it but you can use them as inputs.
9
Register examples
10
-
7/31/2019 Dieu Khien Logic2
6/15
10/24/2012
6
Explanations When input X401 is on the bank of auxiliary relays M160 to M175 are
recognised as a register and bit 0 (M160) is set high. Each time input X402is pulsed, the bit is moved along to M161, M162 and so on.
Each individual bit is used to turn on a corresponding output in order toindicate its status. For
example if bit M165 is high, then output Y435 is turned on. Switch on X401 and output 430 should light up. Each time input X402 is pulsed the bit moves along and the next output
light ups. When input X403 is pulsed, the register is reset.
If X401 is off a low is loaded into M160. If a shifting performed, the low (light off) is carried along with each shift. By switching X401 on or off and shifting, it is possible to arrange any
pattern on the register.11
2.1. Khi nim v mch logic tun t2.1.1. nh ngha: Mch logic tun t l mch logic m tn hiura ca mch khng nhng ph thuc vo tn hiu u vo, mcn ph thuc vo th t, thi gian tc ng ca tn hiu vo
2.1.2. Tnh cht C nh C yu t thi gian Cng 1 tn hiu vo, tn hiu ra c th khc nhau (cc trng thi
trong hay trng thi lm vic)
Mch logict hp
Mch nh
t/h vo t/h ra
12
-
7/31/2019 Dieu Khien Logic2
7/15
10/24/2012
7
2.1.3. Phn loi Mch logic tun t ng b: vic chuyn trng thi
trong mch khng nhng ch ph thuc vo tnhiu u vo, trng thi trong trc , m cn ph thuc vo xung ng b
Dng ph bin trong my tnh (mn T s) Mch logic tun t khng ng b: vic chuyn
trng thi trong mch ch ph thuc vo tn hiuu vo, trng thi trong trc
Khng c tn hiu ng b
Thng gp trong cng ngh ca cc my sn xut cngnghip
13
2.2. Biu din mch logic tun t2.2.1. Biu din bng li ni, ch vit m t mt
qu trnh cng nghV d 2.1 : 3 nt n iu khin ng c M
n nt A: ng c quay thun n nt B: ng c quay nghch
n nt C: ng c dng
14
-
7/31/2019 Dieu Khien Logic2
8/15
-
7/31/2019 Dieu Khien Logic2
9/15
-
7/31/2019 Dieu Khien Logic2
10/15
10/24/2012
10
Trnh t thit k ca phng php GRAFCET
19
Lp G I
Lp G II
Xc nh hmiu khin
Xc nh s iu khin
Chn s bthit b
M t chi tit cc trng thi lmvic, ch thch y cc hnhvi lm vic ca cng ngh
L GI nhng m t c thayth bng cc thit b va chn(m ha GI dng bin logic )Chn loi thit b
v cc bin logictng ng
Lp G I
a0 a1A+
A-
m
20
0
1
2
trng thi sang phi
trng thi ban u
Xc nh trng thi ban u
cui hnh trnh
trng thi sang tri
n nt m hoc u hnh trnh
u hnh trnh
V d 2.10
-
7/31/2019 Dieu Khien Logic2
11/15
10/24/2012
11
21
Lp G II
0
1
2
S1=A+
g
a1
S2=A-
m, a0
a0
Xc nh hm iu khin
S0
02
112
21
001
10
200
)(
S S
S aS
S S
S amS
S S S agS
S iu khin r le-tip im
22
S0
g
a0
S1
S2
S2 S1
S0
m
a0 S0 S2
S1
a1 S1
S2
S0
-
7/31/2019 Dieu Khien Logic2
12/15
10/24/2012
12
Examples
23
starts with everything off (retracted). Closing the push buttonswitch PB1 starts the cycle.
Next B g oes on (B+) and then when reaching full stroke itgoes off again (B - )
When B is fully retracted (off) it is switched on again. When B reaches its full stroke for the second time, A is
switched on. When A reaches full stroke both cylinders are switched off
together and retract together.
The cycle stops until PB1 is pushed again. B+ B - B+ A+ (A - B- ) simultaneously,
24
-
7/31/2019 Dieu Khien Logic2
13/15
10/24/2012
13
Cc dng mch c bit Mch phn k HOC
25
i
i+1 i+2
ai+1
i+3
ai+2 ai+3
iii
iii
iii
iiii
S aS
S aS
S aS
S S S S
33
22
11
321
Mch hi t HOC
26
i+4
i+1 i+2
ai+1
i+3
ai+2 ai+3
3322114
4321
iiiiiii
iiii
S aS aS aS
S S S S
-
7/31/2019 Dieu Khien Logic2
14/15
10/24/2012
14
Mch phn k V
27
i
i+1 i+2
ai+1
i+3
ai+2 ai+3
iiiiiii
iiii
S aaaS S S
S S S S
..
..
321321
321
Mch hi t V
28
i+4
i+1 i+2
ai+1
i+3
ai+2 ai+3
3322114
4321
..... iiiiiii
iiii
S aS aS aS
S S S S
-
7/31/2019 Dieu Khien Logic2
15/15
10/24/2012
V d 2.11
29
m
a0
a1
b0 b1
A-A+
B-
B+
A-A+0
1
2
trng thi i xung
trng thi ban u
Xc nh trng thi ban u
cui hnh trnh i xung
trng thi i ln
n nt m hoc u hnh trnh i xung v cui hnh trnh i ngang
u hnh trnh i xung v u hnh trnh i ngang
3 4
u hnh trnh i xung v cui hnh trnh ingang
trng thi sang phi trng thi sang tri
cui hnh trnh i ngang u hnh trnh ingang
30
0
1
2
S1=A+
S0
g
a1
S2=A-
m a0 b0
a0 b0
3 4
a0 b1
S3=B+ S4=B-
b1 b0
m
a0
a1
b0 b1
A-A+
B-
B+
A-A+10
400
S S
S bgS
21
310001 )(
S S
S bS bamS
13
2003
S S S baS
432
112
S S S
S aS
04
2104
S S S baS