manual · hydraulic technology trainer manual . 1 precautions: 1. oil pump is powered by 3-phase ac...

Hydraulic Technology Trainer

Manual

1

PRECAUTIONS:

1. Oil pump is powered by 3-phase AC power supply, in L1, L2, L3 sequence.

2. Oil pump oil inlet pressure shall be 3MPa.

3. When an experiment is over, turn off power supply and take off plugs.

4. In pressure relay experiments, pressure relay shall be in 25 stages.

5. Buttons, solenoid valves, intermediate relays are powered by DC 24V power

supply.

6. Each experiment needs pump and pressure regulator, so pilot overflow valve and

pump outlet 1-way valve are combined in the pressure regulator, students can use

the oil pipe plug in experiments. On pressure regulator, there is a overflow valve

controller for multi-stage pressure regulation experiments.

7. Experiment finished, hang the Training pipe tubing Tubing suspension on both

sides of the device, to prevent the leakage of hydraulic oil

2

Contents

一、Throttle valve speed regulation circuit ............................................................................... 3

1、Constant-pressure throttle speed regulation circuit ................................................................. 3

2、Variable-pressure throttle speed regulation circuit .................................................................. 5

二、Speed regulation valve throttle speed regulation circuit ............................................................... 6

1、Constant-pressure throttle speed regulation circuit ................................................................. 6

2、Variable-pressure throttle speed regulation circuit .................................................................. 8

三、Simple pressure regulation circuit ............................................................................................. 9

四、Multiply overflow valve pressure regulation circuit................................................................... 10

五、Pressure reduction valve circuit .............................................................................................. 12

六、3-position switching valve discharging circuit .......................................................................... 13

七、Pilot overflow valve discharging circuit ................................................................................... 14

八、Balanced valve circuit ...................................................................................................... 16

九、Sequence valve sequence circuit ............................................................................................. 18

十、Travel sequence circuit ......................................................................................................... 19

十一、Relay sequence circuit ...................................................................................................... 20

十二、Hydraulic 1-way valve lock circuit ..................................................................................... 21

十三、Hydraulic control check valve two way block circuit .................................................. 22

十四、Directional valve(O) block circuit ................................................................................ 23

十五、Speed regulation valve serial speed regulation circuit ............................................................ 24

十六、Speed regulation valve parallel circuit ................................................................................. 26

十七、Speed control valveshort circuit of speed changeover circuit ...................................... 27

十八、Parallel speed regulation valve synchronous circuit ............................................................... 28

十九、Differential control circuit ............................................................................................ 29

二十、Variable pump volume speed-modulating circuit ........................................................ 30

二十一、Conbined variable pump and speed control ............................................................. 31

二十二、PLC controlled pressure relay order circuit .............................................................. 32

二十三、PLC controlled proximity switch order circuit ......................................................... 33

3

一、Throttle valve speed regulation circuit

1、Constant-pressure throttle speed regulation circuit

Oil inlet throttle speed regulation bypass throttle speed regulationOil return throttle speed regulation

A Bx

Pilot overflow valveDB10

P

AB

T

Constant oil pump

DT1DT1DT1

Oil return throttle speed regulationOil inlet throttle speed regulation

1-shaft oil cylinderG50/20*100

1-direction throttle valveDRVP6

1-direction throttle valveDRVP6

2-position & 4-way switching valveDSG-2B2A-D24

A

B

A

B

P

A B

T YN6

Constant oil pump

Pressure meterYN6

P

AB

TPilot overflow valveDB10

A Bx

P

A

B B

A


A B x



DT1 DT1

SB1SB2

KZKZ

KZDT1

+ -


Pressure meter YN6

Throttle valve DVP6

P

AB

T

A

B

P A B

x



Constant oil pump

P

A B

T

A

BThrottle valveDVP6



Pressure meter YN6 Pilot overflow valve

DB10

A Bx

Constant oil pump

P



Throttle valveDVP6A B

Pressure meterYN6

P

Pressure meter

Constant oil pump

4

Circuit connecting diagram

The constant pressure governor circuit contains three ways of speed-governing：

flow control speed-governing in inlet and out let ， by-pass flow-control

speed-governing。Inlet flow control and outlet flow control include other ways， as

picture upon，inlet pressure is determined by the relief valve. the speed fluctuation of

cylinder is smaller than throttle valve, when doing the the experiment ,connect the oil

circuit and electrical circuit as diagram，when the pump starts， the cylinder

protuberate，when press “SB2”，the cylinder retracts，when press “SB1”，the cylinder

protrudes.

Hydraulic device in the experiment：Constant oil pump、one-way valve、Oil

cylinder、single electronic control 2-position & 4-way valve、overflow valve、Throttle

valve。

By using inflow throttle speed regulation circuit the motional smoothness is

weaker，as for the oil from hydraulic cylinder return directly to cylinder without

back-pressure. When load decrease,it will stroke forward or crawl.

Using outflow throttle speed regulation circuit:as for throttle valve produces back

pressuer to the return oil cavity of cylinder,so it can move stably,in contrast,the

throttle valve opening of inflow throttle speed regulation circuit is big,so that not easy

to block the oil circuit,in order to improve the comprehensive performance of

circuit ,to connect the inflow throttle speed regulation circuit to the return oil circuit

back pressure valve, so that it concludes the advantages of the two circuits.

5

2、Variable-pressure throttle speed regulation circuit

SB1SB2

KZKZ

KZDT1

+ -


The overflow valve is used as safety valve in this experiment device，the system

has no overflow loss. The opening of adjusting throttle valve can control oil cylinder

speed conveniently. When do the experiment, please connect the oil circuit, circuit as

the diagram, when the pump start, the oil cylinder exsert, push “SB2”, the oil cylinder

retract, push “SB1”, oil cylinder exsert.


cylinder、single electronic control 2-position & 4-way valve、overflow valve、Throttle

valve.


B

P T

P

Pressure meter YN6

2-position & 4-way switching valve DSG-2B2A-D24

A BA B

Throttle valveDVP6overflow valveDG-01Pilot overflow valveDB10

A Bx

Constant oil pump

DT1

6

二、Speed regulation valve throttle speed regulation circuit

1、Constant-pressure throttle speed regulation circuit

bypass throttle speed regulationOil inlet throttle speed regulation Oil return throttle speed regulation

P

A B

T

A

B speed regulation valveFCK-G02A

Pressure meter YN6

Constant oil pump

A B x




Pressure meterYN6

speed regulation valveFCK-G02A

A

BP

B

T

P



Pilot overflow valveDB10A B

xConstant oil pump

Pressure meter YN6

调速阀FCK-G02A

2 position & 4-way switching DSG-2B2A-D24



A Bx

Constant oil pump

P

A B

T

P

DT1 DT1

DT1



One-way speed control valveFCK-10

One-way speed control valve

FCK-10

Pressure meter YN6 Pressure meter

YN6


A A

B B

B A x

Constant oil pump Constant oil pump


Pilot overflow valveDB10P

P

A B

T2-position & 4-way switching valveDSG-2B2A-D24

DT1 DT1

Oil inlet throttle speed regulation Oil return throttle speed regulation

A Bx

P

A B

T

P

A A

B B

7

SB1SB2

KZKZ

KZDT1

+ -


Constant voltage variable speed circuit is consist of three way of speed

regulation in the experiment, they are oil inlet throttle speed regulation, oil return

throttle speed regulation and bypass throttle speed regulation. Oil return throttle speed

regulation has another mode, as the above diagram. Oil inlet pressure is decided by

overflow valve. The speed undulatory property of oil cylinder is smaller than throttle

valve. Connect the oil circuit , circuit as the above diagram. when the pump start, the

oil cylinder exsert, push “SB2”, the oil cylinder retract, push “SB1”, oil cylinder

exsert.


cylinder、single electronic control 2-position & 4-way valve、overflow valve、speed

regulation valve

The difference between this experiment and constant voltage throttle valve speed

regulation is that the speed undulatory property of speed regulation valve is smaller

than throttle valve.

Use throttle speed regulation circuit of speed regulation valve. The speed is with

hard load characteristic and good steady speed. The disadvantage of this circuit is

large loss of energy and heating oil situation is more serious than with the throttle

valve. The circuit used for the smooth movement of the low-speed low-power

demanding systems, such as machine tool hydraulic systems.

8

2、Variable-pressure throttle speed regulation circuit

SB1SB2

KZKZ

KZDT1

+ -


The speed undulatory property of oil cylinder is smaller than throttle valve.

Connect the oil circuit and circuit as the above diagram. When the pump start, the

oil cylinder exsert, push “SB2”, the oil cylinder retract, push “SB1”, oil cylinder

exsert.


cylinder、Pressure meter、one-way valve、2-position & 4-way switching valve、Pilot

overflow valve、Throttle valve.


A B

P T

P

Pressure meter YN6


A B

A B

speed regulation valveFCK-G02Aoverflow valveDG-01Pilot overflow valveDB10

A Bx

Constant oil pump

DT1

9

三、Simple pressure regulation

SB1SB2

KZKZ

KZDT1

+ -


Connect the oil circuit , circuit as the above diagram. when the pump start, the oil

cylinder exsert, push “SB2”, the oil cylinder retract, push “SB1”, oil cylinder exsert.

When the oil cylinder reached the end, regulate the overflow valve, pressure meter

can clearly display the system pressure changes.


cylinder、Pressure meter、2-position & 4-way switching valve、Pilot overflow valve、

Throttle valve.

Constant oil pump

YN6

Throttle valveDVP6

DB10

A

B

P T

A B

A B x


P DT1

Pressure meter

Pilot overflow valve

10

四、Multiply overflow valve pressure regulation

circuit


When the hydraulic system need multilevel pressure to control, you can choose

this circuit. Connect the oil circuit and circuit, in the above diagram the remote

control port of the main overflow valve 1 connect with remote pressure regulating

valve 2 and 3 by 3-position & 4-way electromagnetic valve 4. When the switching

valve median, the system pressure is controlled by overflow valve 1. When the

YN6

3-position & 4-way switching valve (M）DSG-01-3C60

remote control overflow valveDG-01

A B B

remote control overflow valveDG-01

A


P

A B

T

A B

Constant oil pump

Px

DT1 DT2

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

Pressure meter

11

switching valve on the left and get power, the system pressure is controlled by valve 2,

and when on the right and get power is controlled by valve 3. So the system can set on

three pressure. Pls note that the pressure of remote pressure control valve 2 and 3

must belower than the pressure of the main overflow valve 1.


cylinder、Pressure meter、2-position & 4-way switching valve、Pilot overflow valve、

remote control overflow valve.

12

五、Pressure reduction valve circuit

SB1SB2

KZKZ

KZDT1

+ -

Connect the oil circuit and circuit. When the pump start, the oil cylinder exsert,

push “SB2”, oil cylinder retract, push “SB1”, oil cylinder exsert. Clearly display the

pressure of relief circuit system by control the button of pressure reducing valve. This can

compared with the pressure of overflow valve with constant voltage.

In the hydraulic system, when the working pressure for one of the branch circuit lower than the setting of oil source, can use the first degree relief circuit. The max working pressure for hydraulic pump is controlled by overflow valve 1, the working pressure of hydraulic cylinder 3 is controlled by pressure reducing valve 2. Generally, pressure of pressure reducing valve must above 0.5MPa, not lower than the pressure of 0.5MPa of overflow valve 1, this can make the outlet pressure of pressure reducing valve in steady range.

Hydraulic device in the experiment：Constant oil pump、one-way valve、Oil cylinder、Pressure reducing valve、overflow valve、singe electronic control 2-position

& 4-way valve.

1-stage pressure meter YN6

2-stage pressure meter YN6

Constant oil pump

2Pressure reducing valveDRIO-4-5X5


Pilot overflow valveDB10P

P P

A B

T


A

BY

A Bx

DT1

13

六、3-position switching valve discharging circuit

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

Connect the oil circuit and circuit. Push “SB2”, 1DT get power and oil cylinder

exsert, push “SB3”, 2DTget power and oil cylinder retract, push “SB1”, 1DT and 2DT

both power off, circuit unload.

When the working parts stop working(such as load and unload and so on), the

hydraulic cylinder don’t need pressure oil. If the oil of the opening of hydraulic pump

flow back to oil tank(the motor not stop),the pump unload. The unload of hydraulic

pump make low power lost, reduce oil heating and make the service life longer.

DT2

Pressure meterYN6

To other control oil circuits

1-way valve to control oil circuit pressure （around 0.3MPa）

Here is not for experiment

Pressure meterYN6

A Bx

P




DB10Constant oil pump

P

A B

TDT1

14

七、Pilot overflow valve discharging

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2


Connect the oil circuit and circuit when doing experiment. When the pump start,

the oil cylinder exsert, when push the “SB2”, oil cylinder retract. When push “SB1”,

oil cylinder exsert, when push “SB3”, 2DT get power, the circuit unload.


cylinder、Pilot overflow valve、2-position & 4-way valve、Pressure meter.

DT1

DT2

Constant oil pump

Pressure meterYN6



A B

P T

A

B

x A

B

P


2-position & 2-way switching valve 3WE6

15

When the system on work, two-port electromagnetic valve is power off, unload

oil circuit is power off and pressure oil of the pump will enter the system. When

two-port electromagnetic valve get power, oil pressure of the pump will reach

two-way valve through pilot operated overflow valve, flow back to oil tank, make it

unload(2-position & 4-way switching valve can replace of 2-position & 2-way

switching valve).

16

八、Balanced valve circuit

SB1SB2

KZ1KZ1

DT1

+-

DT2

KZ1

KZ2

KZ2

SB1SB3

KZ2

KZ2

KZ1


Connect the oil circuit and circuit when doing experiment. Push “SB2”, 1DT get

power and oil cylinder exsert, push “SB3”, 1DT loss power and 2DTget power, oil

cylinder retract, push “SB1”, the electromagnet loss power, the circuit unload.

Adjust the start pressure of the direct controlled balance valve to make it larger

than the back pressure which is produced by hydraulic cylinder piston and its working

parts in inferior vena. This can prevent the piston and the working parts of their own

decline. When the hydraulic cylinder piston down, return oil cavity produce back

pressure to act balanced, but a larger power loss.

P

Constant oil pump

Pressure meterYN6

DB10

DT2

A B

1-direction sequence valveDZ10-30/21 1-shaft oil cylinder

G50/20*100


A B P x

AB

DT1T


17

This circuit can be realized by using the fly wheel to hang weight in one side of

the oil cylinder.


cylinder、Pilot overflow valve、3-position & 4-way valve(M)、Pressure meter、

1-direction sequence valve.

18

九、Sequence valve sequence circuit

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

KZ2

KZ1


Connect the oil circuit and circuit when doing experiment. When push “SB2”,

1DT get power, oil cylinder order action with 1,2. When push “SB3”, 2DT get

power, oil cylinder order action with 3,4.


cylinder、Pilot overflow valve、3-position & 4-way valve、Pressure meter、1-direction

sequence valve.

DT2

Constant oil pump

2-shaft oil cylinderG50/20*100/100

pressure meterYN6


1-direction sequence valveDZ10-30/21

A A

B B

P

A B

TABx

3-position & 4-way switching valve (0）DSG-01-3C2


DT1

19

十、Travel sequence circuit

SB1

KZ1KZ1

DT1

+-

SQ2

KZ2KZ2

DT2

KZ1

KZ2

SQ3

SQ1


Connect the oil circuit and circuit when doing experiment. When push “SB1”, 1DT get power and oil cylinder 1 exsert, when travel switch SQ3 closed, 2DT get power and oil cylinder 2 exsert. When travel switch SQ2 act, 2DT loss power and oil cylinder 2 retract, When travel switch SQ1 act, 1DT loss power and oil cylinder 1 retract. The oil cylinder finish the 4(1-2-3-4) action automatically, push SB1 again, repeat the whole action.

Hydraulic device in the experiment：Constant oil pump、one-way valve、Oil cylinder、Pilot overflow valve、2-position & 4-way valve、Pressure meter、travel switch.

SQ3

pressure meterYN6

Oil cylinder 1

SQ2SQ1

Oil cylinder2

22 1

DT1DT2DSG-2B2A-D24 2-position & 4-way switching valveDSG-2B2A-D24 p

A B

T

A

p T

B


Constant oil pump

2-position & 4-way switching valve

20

十一、Relay sequence circuit


Connect the oil circuit and circuit when doing experiment. When push “SB1”,

electromagnetic valve 1DT get power and oil cylinder 1 exsert, When pressure

reached the corresponding pressure of relays, pressure relay normally open contact

closed, electromagnetic valve 2get power and oil cylinder 2 act. Push SB2, finished.


cylinder、Pilot overflow valve、2-position & 4-way valve、pressure relay、Pressure

meter.

Oil cylinder 1 Oil cylinder2

2

K0

Pressure relayHED4OP/5

12


2-shaft oil cylinderG50/20*100/100

2-position & 4-way switching valve DSG-2B2A-D24


p

A B

T p

A B

T

A

B

X

DT2 DT1

Constant oil pumpPilot overflow valve

DB10

SB1

KZ1KZ1

DT1

+-

DT2

KZ1

K0

SB2

21

十二、Hydraulic 1-way valve lock circuit

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

KZ2

KZ1


Connect the oil circuit and circuit when doing experiment. Push “SB2”, 1DT get

power and oil cylinder exsert, push “SB3”, 2DT get power and oil cylinder retract.

Push “SB1”, electromagnet loss power, oil cylinder on one-way locked status.


cylinder、Pilot overflow valve、3-position & 4-way valve(H)、pressure relay、Pressure

meter.

Constant oil pump

3-position & 4-way switching valve（H）DSG-01-3C3


A B

X

P T

A

B

AB

Pilot overflow valveDB10 pressure meter

YN6

X

DT1 DT2

22

十三、Hydraulic control check valve two way block circuit

SB1

SB2

KZ1KZ1

DT1

+-

SB4

KZ2KZ2

DT2

KZ1

KZ2

KZ2

KZ1


Connect the oil circuit and circuit when doing experiment. Push SB2, the piston

rod exsert, push SB3, the piston rod retract, push SB1, piston rod stop. Oil cylinder on

double way locked status.

Hydraulic device in the experiment：Constant oil pump、one-way valve、Oil cylinder、Pilot overflow valve、3-position & 4-way valve(H)、Hydraulic control one-way valve、Pressure meter.

3-position & 4-way switching valve (H）DSG-01-3C3

Constant oil pump


Hydraulic Control one way valve SV10PA1

A

B

X

A B

P T

pressure meterYN6


A BX

A

B

X

P

DT1 DT2

23

十四、Directional valve(O) block circuit

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2


Connect the oil circuit and circuit when doing experiment. Push SB2, the piston

rod exsert, push SB3, the piston rod retract, push SB1, piston rod stop. Oil cylinder on

double way locked status.


cylinder、Pilot overflow valve、3-position & 4-way valve(H)、Hydraulic control

one-way valve、Pressure meter.

3-position & 4-way switching valve (0) DSG-01-3C2

Constant oil pump

P

A B

T


YN6 PA B

X


DT1 DT2

pressure meter

24

十五、Speed regulation valve serial speed regulation circuit

SB1

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

SB2

SB4


Connect the oil circuit and circuit when doing experiment. Push SB1, the oil

cylinder retract, push SB2, the oil cylinder exsert, push SB3, 2DT get power, oil

cylinder is slow movement. Push SB4, 2DT loss power oil cylinder is quick

movement.


cylinder、Pilot overflow valve、2-position & 4-way valve、speed regulation valve，

Oil inlet speed regulation

Constant oil pump

speed regulation valve 2FKC-G02

A

B3WE6


A

B

A

B

P

A B

T Pilot overflow valveDB10P

A BX

pressure meter

speed regulation valve 1FKC-G02

DT12-position & 4-way switching valveDSG-2B2A-D24

2-position & 2-way switching valve

25

Pressure meter.

Speed regulation circuit of two speed regulation in serial. To control the power

on or power off of DT2, so that the oil through the control valve or through the speed

control valve 1 via a further speed control valve 2 to enter the left chamber, but the

opening of speed control valve 2 is smaller than the speed control valve 1. So that if

the oil through 2 speed control valve, the power loss more.

26

十六、Speed regulation valve parallel circuit

SB1

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

SB2

SB4


Connect the oil circuit and circuit as diagram, when press SB1, the cylinder

protuberates; press SB2, the cylinder retracts，press SB3、 SB4,the moving speed is

different.



Pressure meter.

Constant oil pump

DSG-2B2A-D24

FKC-G02speed regulation valve 2FKC-G02

A

B

A

B


P

A B

T

P

A BX


P T

A B


DT1

DT22-position & 4-way switching valve

speed regulation valve 1

27

十七、Speed control valveshort circuit of speed changeover

circuit

SB1

SB2

KAKA

DT1

+-

SB4

KZ2KZ2

DT2

KA

KZ2

SB3

SB5



protuberates; press SB3, the cylinder retracts，press SB4,2DT get electrify，and oil

circuit was short connected，cylinder in fast motion.



Pressure meter.

Constant oil pump


P

A B

T

A

B speed regulation valveFKC-G02



PA B

X


pressure meter

DT1

DT2

28

十八、Parallel speed regulation valve synchronous

SB1SB2

KMKM

DT1

+-

KM



protuberates; press SB3, the cylinder retracts，the two cylinders can protuberate at a

same speed by adjusting the two speed regulation valves，but in low precision.



Pressure meter.

Constant oil pump



P

A B

T

A BX


YN6


speed regulation valveFKC-G02

P

A

B

A

B

DT1

pressure meter

29

十九、Differential control

SB1

SB2

KA

DT1

+-

SB3

DT2

KM

KA

KMKM

KA

KA

KM


Connect the oil circuit as diagram, when press SB2, 1DT gets electrify. The

cylinder protuberates; press SB3, 2DT gets electrify, the cylinder retracts. press SB1，

the cylinder fast moving in differential motion.


cylinder、Pilot overflow valve、2-position & 4-way valve、Pressure relay，Pressure

meter.

YN6 Pilot overflow valveDB10

P

A B

T

3-position & 4-way switching valve (P)DSG-01-3C9


P

A BX

DT1 DT2

Constant oil pump

pressure meter

30

二十、Variable pump volume speed-modulating

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

KZ2

KZ1


Connect the oil circuit as diagram，when push SB2， 1DT get power，Oil cylinder exsert，when push SB3， 2DT get power，Oil cylinder retract，in the process of the Oil cylinder exsert and retract，adjust variable pump flow adjustment screw by manual, so as to achieve the purpose of regulating cylinder speed. Push SB1，Oil cylinder stop.

Hydraulic device in the experiment：Variable oil pump、one-way valve、Oil cylinder、Pilot overflow valve、3-position & 4-way valve(O)、Pressure relay，Pressure meter.

Variable oil pump

1-shaft oil cylinder

G50/20*100

P

A B

T

PA B

X

YN6Pilot overflow valve

DB10

3-position & 4-way switching valve (0)DSG-01-3C2

DT1 DT2

pressure meter

31

二十一、Conbined variable pump and speed

SB1

SB2

KZ1KZ1

DT1

+-

SB3

KZ2KZ2

DT2

KZ1

KZ2

KZ2

KZ1


Connect the oil circuit as diagram, when press SB2, 1DT gets electrify. The

cylinder protuberates; press SB3, 2DT gets electrify, the cylinder retracts. by using the

flow adjusting screw of variable capacity pumps or adjusting the speed control

valve ，the speed of the cylinder can be adjusted. When press SB1, the cylinder will

stop.

Hydraulic devices in this experiment including：Variable oil pump、one-direction

valve、Oil cylinder、O 3-position & 4-way valve，pressure relay、pressure gauge、

speed regulation valve.

X

YN6


DT1 DT2

Pressure meter

Variable oil pump

3-position & 4-way switching valve (0)DSG-01-3C2

P

A B

T

A

B speed regulation valveFKC-G02

PPilot overflow valveDB10

A B

32

二十二、PLC control pressure switch order movement return route

I/O distribute:

I1.0:start-up，I1.1:stop，Q0.1: the oil cylinder 1 stretches out，Q0.2: the oil cylinder 2

stretches out，I0.1 :pressure switch。

33

二十三、PLC control electric appliance traveling schedule order

movement return route

I/O distribute：

I1.0 :start-up，I1.1 :stop，I0.1: Limit switch SQ1 input，I0.3:Limit switch SQ2 3

input，Q0.1: the oil cylinder 1 stretches out，Q0.2: the oil cylinder 2 stretches out。

manual · hydraulic technology trainer manual . 1 precautions: 1. oil pump is powered by 3-phase ac...

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