Electrical Control System Instruction

7/27/2019 Electrical Control System Instruction

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YHZD-25 CONCRETE MIXING PLANT

E L E C T R I C A L C O N T R O L S Y S T E M I N S T R U C T I O N

VERSION 1.0

25 Jun. 2012


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Content

1. Foreword 32. Basic Working Process of the system43. Safety operation instruction.54. Microcomputer control system ..75. Basic operation step of the computer106. Enter theYHZD-25 mixing p lant soft117. Weighing scale proof-read128. Computer program debug (test)149. Database (project formulation and practical formulation.1610.Parameter sett ing.1711.Exp lanat ions1812.The process of memory control.2113.Operation flow and logical control..2314.Data manage2615.produce record2716.system set2817.Operat ion mode.3018.weighing load cel l.3119.inductive proximity switch and limit switch3220.Isolation signal module.3321.Air Unit3422.Trouble shooting36


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FOREWORD

YHZD25 Mobile Concrete Mixing Plant which adopts advanced

technologies and scientific researching results from home and abroad

and combines our companys years in mixing station producing

experience, which is a new type of Concrete mixing machine designed

and manufactured by our company independently. The machine has

combines materials weighing systems and twin horizontal shaft

mandatory screw flow mixer. The high quality and stability of the

Concrete produced by our machine can meet the requirements of the

high-level pavement road, building, reconstruction and maintenance.

Thank you for your choice of choosing our product. We also hope

you read the manual and mastered the performance and design

feature of the machine before you operate it. We demand you must

operate the machine according to the regulations constituted in the

manual and carry out the daily maintenance. Incorrect operation will

cause great harm to the machine. Special attention must be paid to

the operations, safety, structure and specifications; these are subject

to change without notice with the improvement on technology.

You are welcome to inform us or give us yours suggestions.


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BASIC WORKING PROCESS OF THE SYSTEM

This machine is procedure mainly includes materials weighing, transporting

(material discharging), and lifting, mixing, feed-out (finished product

discharging).

Fill in the materials to the aggregate bins with stone and sand of the different

size and then weighing them according to the ratio (proportion) of different

materials in calculation weighing mode (because the aggregate weighing scale

is just only one weighing scale).After finished weighing, the aggregates should

be discharging the aggregate to the mixer by the drive motor.

The cement (weighing by cement weighing system), the water (weighing by

the water weighing system) and the additives (weighing by the additives system)

are discharge to the mixer. The aggregate, the cement, water and additives are

mixing together in the mixer. After mixing time is up, the materials will be

discharge to the transport vehicle.


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SAFETY OPERATION INSTRUCTION

1. Before starting the machine, always ring the alarm first and check if thereis anybody in the operating area. Make sure there is nobody in the

operating area!

2. Only qualified and reliable persons at least 18 years and above shall be incharged with the operation of the machine.

3. The operations instructions should be adhered to.4. Maintenance should be done at any moment or at regular intervals to

ensure the machine is at good conditions. When on maintenance, the

power supply should be isolated [break-off] and somebody to be on the

watch, especially in maintenance of the mixer.

5. The Mixer of the finished product is not allowed to start withload, becausethe circuit electric current [Starting torque] will be 5---7 times when motor

start and the start mode of the motor is on the proceeding of

STAR /DELTA (Y--) state.

6. Turn off the power supply to the machine, partially for the PLC controlsystem and Scale weighing system, when welding is proceeding.

7. No personal is allowed to stand at the operation area ( i.e. loadingarea ,aggregates waiting lift hopper and finished product hopper lift

area ,asphalt product discharge area), when the machine is running.

8. Unload the material inside the weighing scale after every work shift.9. Dont disassemble or modify the safety equipment.10.Empty the air and water in the Air-Compressor machine, including the

three components in the Air control panels. air-pressure adjust, water

filter and oilsupply maintenance).

11.The performance of control and safety apparatus working state should bechecked before daily operation, if the apparatus cant work normally, stop

the machine and report to the director immediately.

12.Dont adjust the motors overload (circuit electric current) protection valueabove the value of the maximum rated electric current of the motor.


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13.Pay attention to the voltage of the power supply.14.Pay attention to the circuit electric current of the mixer on the operation

panel when the mixer is running on the load.

15.The stop discharging (closed the discharge gate of the weighing) action ofthe measurement scale is made according to the value of zero setting of

the weighing scale and it is made by its self-diagnosis. It is prohibited to

add any other force on weighing system during operation.

16.Grease must be regularly injected into the mixing shaft at both ends ofthe seal to ensure reliable operation of mixer.

17.Check whether any blocking or frictions happen to the beltconveying system and whether it is centered or not, if not centered,

adjust it.

18.Check whether there is any leakage in the air pressure pipe and whetherthe pressure is within the range of0.5---0.7MPa or not.

19. Check the oil level of the machine, Keep them between the high and lowposition level regularly.

20.In order to prevent the mixer compaction, the mixer should be cleared, ifin the event of emergency stop in the production proceeding.

21.Regular inspections of all electrical components in the control cabinet,timely clear the dust, pay attention to moisture. Before starting the

machine the steering system should be check. In the event of any failures,

operation is not permitted.

22. No personal is allowed to stand at the operation area when the machine isrunning.

23.When the flow is proceeding in semi-(full) automatic modes, ifeither oneof the following two situations happens, (1) any one of the aggregates

weighing, cement weighting,water weighing or additives weighing is not in

place, or (2) the mixer discharge gate is not fully closed, then the system

will notautomatically continue to the next process .The operator should

check the cause of the malfunction.


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Microcomputer Control System

Industrial microcomputer control system is a kind of centralized control

equipment researched and developed independently by our company. It

integrates automatic control technology of computer into a whole operation

system, and it is now a new product in material weighing and proportion range

control in Concrete mixing production in China.

This system adopts the control mode of industrial control computer +

industrial programmable controller. It is an automatic control system of high

stability, high real time capability and high intelligence. The control program of

the upper computer of the industrial control integrates the most advanced

concept of simulation neural network model in industrial control at home and

abroad, i.e. the program has simulation function, real time state control,

self-execution on real time information feedback on the working state of the

equipment. The output signal state of the industrial programmable controller is

decided by the set functions of the control program of the upper computer, to

control the opening and closing of each hopper gate and to control the start-up

and shut off of the motor, to realize auto control production.

Function characteristic:

It is equipped with centralized monitoring so it is legible and concise which

are easy to understand and operate.


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Industrial PC is adopted as host computer which boast strong

anti-jamming and reliable work.

Parameters are able to be entered and modified on computer. Documents

can be printed

It is equipped with power cut protection functions, which means that the

data wont be lost when power is off or the computer is shut down. The

computer will save all data eternally and it is unnecessary to enter the data

again when you start the computer again

In dynamic weighing, the weight of materials may be influenced by

impulse, which may result in false signal given by the sensor. But this system

adopts the function of delay weighing compare and steady weighing control,

which is able to control weighing accuracy effectively in dynamic weighing

In consideration of the uncertainty of drop height in actual production, the

function of auto calibration of drop height is due to realize effective data analysis

and intelligent auto control adjustment to ensure accurate weighing

The stability and intelligence of the system control can be realized through

formed flow & memory control, so as to reach the philosophy of actual auto

control

Pause function of control flow is able to meet the requirement of pause

function of control flow due to working needs in continuous production.

Under semi-(full) auto state, when weighing scale is weighing materials

weighing pause is able to pause all the weighing operations. After reset, it is

able to recover normal working state.


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Under semi-(full) auto state, material-feeding pause is able to pause the

feeding of (transitional cabin, cement, water or additives). After reset, it is able

to recover normal working state.

Under semi-(full) auto state, discharging pause is able to pause

discharging when the mixing time is up. If this function has been set on in

discharging, it will shut off the discharging gate first and remain current

discharging timing state. It will recover to normal working state after reset.

Weighing control mode of quick/slow valve is based on the control

philosophy of coarse/fine weighing in the mixer industry; it is an adjustable

control mode relying on drop height and drop timing according to the sizes of

materials.

Real time indications on the running state of the system are given and false

operations of the user are explained.

Chart of System Control


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BASIC OPERATION STEP OF THE COMPUTER

1. Turn on the power for the operation counter (panel) and the UPS

(Uninterrupted Power Supply) and then turn on the power of the UPS for the

computer.

2. Turn on the power key lock for the operation electrical-equipment board (for

the PLC to connect the computer and prepare to start the operation).

3. Press the power on button of the computer to start the computer.

4. After the computer has been start and desktop is shown, you can double

click the YHZD-25 to start the software of the YHZD-25 MIXING PLANT.

5. After the work has been finished, please turn off the computer first, then

turn off the UPS and finally cut off the power supply.

(BE CAREFULLY: YOU MUST FIRST TURN OFF THE COMPUTERTILL

THE MONITOR DISPLAY CHANGES TO BLACK SCREEN AND THEN

YOU CAN TURN OFF THE UPS AND FINALLY CUT OFF THE POWER

SUPPLY).


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ENTER THE YHZD-25 MIXING PLANT SOFTWARE

1. Double click the YHZD-25 software on the desktop of the computer.

2. You can add a customer of the operator or you can choose the name of theoperator and then input the password.

3. Click the button of the SURE you will enter the interface of the software.


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WEIGHINGSCALE PROOF-READ (SCALE CALIBRATION)

1. Click the button of the Verifying weighter on the interface of the software.

2. Choose the weighing scale.

Click the single selection button on the interface of the software.

3. Weighing Scale zero set.

After choose the scale, just click the ZERO button, the scale will set zero

automatically. After the ZERO setting, the ZERO SIGNAL value and AT

PRESENT SIGNAL value (almost) the same; the AT PRESENT WEIGHT

value will zero.

4. Weighing scaleTerminal point set.


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Firstput the standard weightsinside the weighing scale. Wait for stable

signal to display and theninputthe weighing ofall the standard weights at

the ADJUST TERMINAL POINT VALUE, finally click the button of the

TERMINAL POINT. After the Terminal point setting, At present weight

will display the weighing value of all the standard weights; the convert

coefficient textbox will be display a value of the coefficient.

5. The other weighing scales proof-read is thesame waylike step 1---4.

Note: If the material (aggregates, etc) inside the weighing scale,

you can not ZERO SETTING and if nothing standard weights inside

the weighing scale, you can not terminal point setting


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COMPUTER PROGRAM DEBUG (TEST)

1. Input a weighing material proportion, and check the material proportion inthe main interface of the software (regards how to input material proportion

go and see the detail of the DATABASE operation).

2. Air compressor ---- mixer.3. Click the material weighing startup button (i.e. aggregates weighing

startup).

4. Input the password (888999) at the green color button which is under theadjust terminal point value.After input the password, theadjust to try

button and the emulation and just to try textbox will be available.

5. Click a tick on the adjust to trybutton.6. Click the single selection button on the interface of the software to choose

the weighing scale you need.

7. Input the emulation value of the material proportion value at the textbox


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which is under the emulation value just to try.

8. Click write the signal value button to transfers and save the date to PLC.9. After click write the signal value button , the operation mode will be

change to the DEBUGE MODE , and at the present weighttextbox will

display the emulation weight that you input.

10.cement start up water start up and additives start up and then emulationmaterial weighing proportion value (same like the aggregates weighing

startup from step 3---8).

11.Aggregates weighing discharge.12.Mixer discharge to product waiting hopper.NOTE:

1. The coefficient leads buttonAfter the weighing scale calibration, there will be a coefficient display at

the convert of the coefficient textbox. The weighing scale calibration is to

calibrate the coefficient so we can transfers from the PLC to computer to

have a date back up.

Input the password861861at the red color button which is under the

adjust terminal point value.After input the password the button of the

coefficient leads will be available. You can click the button and according

the tip to operation.

2. The coefficient ducting to PLCWhen the weighing scales coefficient is not in correct (by mistaken

operation), you can transfers it from the computer to PLC so you dont

need to calibration again.

Input the password861860at the red color button which is under

theadjust terminal point value.After input the password the button of the

coefficient ducting to PLC will be available. You can click the button and

accordingthe tip to operation.


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DATABASE (PROJECT FORMULATION AND PRACTICAL FORMULATION)

1. Click the button of the DATABASE on the interface of the software.

2. Input the data of the client, engineering and engineering part, etc.


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3. Click the button of the INCREASE add another item of the clientinformation.

4. Before production, you can choose the item that you have increased (addthe client information) then click the button make a selection.

You can also delete the item (the client information that you have added)

just by choosing the item and click the button of DELETE---- (but the data

of the item must not be engaged).

5. Click the button of ANNEX THE FORMULATION and then input the details.6. Before production, you can also delete the item that you have increased (the

proportion that you have added) ---- (but the data of the item must not be

engaged).

7. Choose the one client date that you need and one formulation data(proportion of each of the materials) that you also need and then click the

button CONFIRM THE FORMULATION.

8. Click the button EXIT to quit the database set.

9. You will check whether the data is right or not on the interface of thesoftware and then you can enter the production state (start the machine).

PARAMETER SETTING

1. Click the button of the PARAMETER on the interface of the software, youwill ENTER the PARAMETER SETTING

2. Set each item of the TIME setting.3. Set each item of the ZERO VALUE setting.4. Setting the AHEAD VALUE OF THE WEIGHINGthis is the weight value

that is not weighed due to weighing being stopped ahead of timethat is the

concept of the accurate weighing control.


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5. Setting THE VALUE OF THE RANGE OF THE PROJECT PROPORTION DESIGNERROR of the materials weight.

6. Click the SAVE button to save the data to PLC.7. Click the CONTORL MODEL button to enter the control model setting.8. Set each item of the CONTORL MODE.9. Click the SAVE button to save the data to PLC.

EXPLANATIONS

1. Mixing time: the duration time length from the time when all of the materials(aggregates, cement, water,and additives) are discharged to mixer until the

time when the product is ready finished (before the materials inside the

mixer discharge to outside the mixer).

2. Mixer discharge time: the duration time length from the time when the


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materials inside the mixer is discharge to outside, the discharge gate from

closed to opened till the time when discharge is finished and the discharge

gate is full closed.

3. Trough belt conveyor time After the aggregate discharge from theaggregate weighing scale by aggregate discharge belt discharge to the zero

set value the aggregate from the down position of the trough belt to lift to

the top position (need to spend the time).

4. Cement discharge time: After the aggregate discharge to mixer a fewseconds, the cement will discharge to mixer. Cement discharge time is the

delay time from the moment that the materiel (aggregates) inside the

weighing scale discharges to mixer till the cement discharge to mixer.

5. Water discharge time: Almost same like cement discharge time. (The orderof discharge is aggregates---water----cement).

6. aggregate zero, cement zero, water zero and additives zero : When theweighting scale is discharge to meet the value of ZERO set

the aggregate belt ,cement discharge gate , water discharge gate and

additives discharge gate will stop the action of discharging aggregate,

cement ,water and additives and they will be closed for preparation for

the next time weighing.

7. aggregate accurate control (course/fine weighing): After the aggregateweighing scale weighing value of aggregate meet aggregate accurate

control value setting, the aggregate deposit bin discharge gates will first

close one single weighing gate quickly and thenenter the process ofahead

value to compare whether it suits (meet) the project proportion design

error value to ensure aggregates measurements accuracy, and finally to

decide whether inching or not. (go and look at the weighing mode).

8. weighing mode:1.) Auto calibration of drop height control ( 01 mode )The auto calibration of drop height control means after the weighing scale is

proceeding at the range of the ahead weighing value, the computer will


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modify the range of the ahead weighing value automatically for the

differentmateriel.

2.) Inching control (00 mode )The Inching control: When the weighing scale is proceeding in weighing

materials at the range of the ahead weighing value the weighing gate

(valve) or the weighing motor will be in inching action according to the

keep on time and partition time.

9. 1# auto vibration : When the aggregate 1# bin is proceeding inweighing state, the vibration motor will auto vibrate according to the keep

on time and partition time (if the auto vibration is available).

10.Cement auto vibrator: When cement weighing scale discharge the cement tothe mixer almost reach to the zero setting value the vibration will auto

vibration ( if the auto vibration is available).


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THE PROCESS OF MEMORY CONTROL

When the flow is proceeding at semi-(full) automatic, the process of

memory will be

1. After the aggregates, cements, water and additives weighing scale has beenfinish weighing the materials (at present weight is meet the proportion of the

materials) the weighing startup button will change to green at the interface

of the control soft at the computer.

2. After the aggregates, cements, water and additives scale finished theweighing materials and started the aggregates discharging conveyor belt to

discharging the aggregates to the mixer then the mixer will has a batch of

the materials inside the mixer memory.

3. After the mixer has finished discharge the materials inside the mixer and thedischarge gate is fully closed, the memory of a batch memory of the mixer

will clean.

4. When the flow is proceeding at semi-(full) automatic and if you exit the


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proceeding of the program (or the power is cut off suddenly), at that time,

maybe the mixer has a batch memory. You can open the mixer discharge

gate to cancel the memory.

Note:

The aggregate storing bin comprises of the aggregate one storing bin,

aggregate two storing bin, aggregate three storing bin and aggregate four

storing bin.

The aggregate weighing is the calculation weighing mode (because the

aggregate weighing scale is just the only one single weighing scale). When any

one aggregates storage bin no enough aggregates inside, the material weighing

proceeding will at waiting state till the aggregates has filled in.

When the aggregate scale is in weighing state [i.e. discharging materials],

then power cut-off suddenly or the aggregate had been finish weighing, the

start-up button has change to yellow color on the software in the computer, then

mistakenly someone cancel it from the computer software, in that case, when

power is restored, you need to start the aggregate weighing again MANUALLY

from the point it stop, to avoid overloading of materials, as the system is not

equipped with memory system(the aggregates has not been finished the

weighing and the startup button to change yellow), the weighing value of all

the materials inside the aggregates weighing scale before power cut-off or

mistaken cancel will automatically belong to the aggregate bin one weighing

value, so when the materials are ( has been) inside the weighing scale the

operation should be carefully.


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When the aggregates weighing scale more weighing the aggregate will

be case the mixer running in overload state, and finally the overload relay will be

action.

OPERATION FLOW AND LOGICAL CONTROL

Manual control is prohibited under full auto mode. Semi-automatic State

must be the mixer and air- compressor start-up ready.

Every full automaticrunning must be under emptystate (the mixer has

not a batch of materials inside memory), mixer, air compressor has been

alreadyin running state.

When the weighing of material has been finished, and it is intended to

change to Weighing of another proportion of material, the former

weighingmust be cancel first before you start weighing another proportion

of material. After you cancel the former aggregates weighing, you must

discharge it outside the weighing scale.


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When the flow is proceeding at semi-(full) automatic state, the following

conditions for the discharge of aggregates must be met (1.) the weighing of

aggregates has been finished, (2.) the mixer discharge gate is fully closed, (3.)

the cement, water and additives have finished weighing, (4.) the mixer has

not a batch of the memory of the materials inside.

When the flow is proceeding at semi-(full) automatic state, the precondition

for the Cement weighing is that the discharge gate must be fully closed.

When the flow is proceeding at semi-(full) automatic state, the following

conditions of the mixer discharge must be met (1.) The mixer discharge is

not in the pause state. (2.) The mixing time is finished.

The accumulation of current batches display on main interface: When the

flow is proceeding under semi-(full) auto mode, the accumulation will increase

one time once the aggregates inside the weighing scale has been discharged.

And the current batch quantity will be cleared during the first impulse (batch)

whenever full auto working is started.

Flow pause: The flow pause includes the material weighing pause,


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materials feeding pause and discharging pause.

Proximity switch (closed switch, touch switch, inductive proximity

switch):

1. Inspection on cement discharge gate: When the flow is proceeding atsemi-(full) automatic state, if the cement weighing scale discharge gate is

not fully closed, the function to start weighing will be rejected.

2. Inspection on the discharge gate of the mixer: When the flow is proceedingat semi-(full) automatic state, if the discharge gate is not fully closed, the

function to start discharge aggregates inside the weighing scale to mixer will

be rejected. And if the mixer discharging gate is not fully opened, the mixer

closed time account of auto discharging gate will be rejected (auto delay

closing is rejected).

4. Simulation display of the state of proximity switch:

The indicator on the main interface shows the state offully closed and the

state offully open position.


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DATA MANAGE

Click the button of the DATA MANAGE on the interface of the software to

enter the interface of the DATA MANAGE.

In this interface of the software you can add delivery transportation truck

number by add a car number and delete the delivery transportation truck

number by delete a car number. All the delivery transportation car number

that you add will appear in the main interface of the software, you can select

the car number which is delivering at the mixing plant. When the flow is

proceeding in automatic mode, after finish production, the car number will

appear in consignment bill.


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PRODUCE RECORD

1. Click the menu of produce record at the main interface of the software toenter into the page of the data of production report form.

2. Users can select some reported data according to certain conditions, andthen click print to print some production report form.


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SYSTEM SET

Click the button of the system set on the interface of the software to enter

The system setting interface.

In this interface, you can set the PLC working mode and the COM port

setting.

In here we set PLC working model on monitor model.

The PLC COM port setting is according to the connection between the

computer and the PLC, because the computer has more than one COM PORT

So it is depend on which port that you connect. If the wrong setting you can see

the PLC is not connection (communication) with the computer appear in the left

down corner on the computer software and at that time the computer will

alarm to you for notice the problem. You can change to another port and then

click the button sure on the software at the computer to solve the problem.

When the PLC power supply is cut off, the PLC is not connection with the

computer also will appear on the computer software and the alarm also is

given so you must be quit the software to prevent the COM PORT of the

computeror the COM PORT of the PLCdamage.


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If the PLC NOT COMMUNICATION appearing on the left down corner that

means:

1. The power is not supply to the PLC.2. The Fuse was broken.3. The wrong connect of the computer and PLC (the wrong setting on the

computer of the software).

4. The communication data cable is damage.5. The computer outlet of the COM Port is damage.6. The PLC outlet of the COM port is damage.7. The PLC is damage.


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OPERATION MODE

Manual control mode:

This mode is for the test, maintenance. This mode is just to press each

button on the operation panel.

Semi- auto mode:

Bell ---- air compressor ---- mixer start --- weighing of materials

(aggregates start up, cement start up , water start up and additives

start up )---- aggregates discharge to mixer----mixer discharge.

Auto running mode:

Bell--- air compressor ---mixer start--- auto running (according to the

numbersof the auto running batch by your setting).

Auto running mode and semi-auto mode change:

When the auto running button is pressed for one time, the proceeding is

auto running, if you press the button again the proceeding will be

changed to semi-auto state.


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WEIGHING LOAD CELL

+EXCITATION (INPUT---RED)

EXCITATION (INPUT---BLACK)

+SIGNAL (OUTPUT---GREEN)

SHIELD

-SIGNAL (OUTPUT---WHITE)

WEIGHING

LOAD

CELL

WEIGHING LOAD CELL CONNECT (WIRING)

INPUT EXCITATION = 10V DC/AC

BETWEEN RED LINE AND BLACK LINE

INPUT IMPEDANCE = 390.00 OHMS

BETWEEN RED LINE AND BLACK LINE

OUTPUT IMPEDANCE = 350.00 OHMS

BETWEEN GEEN LINE AND WHITE LINE

INSULATION RESISTANCE >5K MEGOHMS

NOTICE: (1) Please make sure vertical installation and not any inclined angle.

(2) Pay attention to the same capacity and the same rated output

value, when one weighing scale is assembled by any load cell

together (e.g. aggregates weighing scale=4 load cell

assembled).


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INDUCTIVE PROXIMITY SWITCH AND LIMIT SWITCH

When the power is on and the anything Iron (or others metal) is proximity

(closed) the inductive proximity switch (the gap between the metal and

inductive proximityswitch is 2 to 5 mm), the switch inside the inductive

proximity will change the condition from disconnect to connect state and the

relay actuator will action (the relays coil had got power), at that time relay sent

a signal to PLC. The computer will displaythe condition of the position (open

or close) of the discharge gates (mixer discharge, powder discharge).

When the cement discharge gate is fully closed, the handle inside the

MIXER DISCHARGE CLOSED INDUCTIVE

INDUCTIVE

SENSOR

MB- ( BLUE)

(BLACK)

MA+( RED)

PLC INPUT A21

38

JZ4

JZ4 RELAY COIL

SWITCH INSIDETHE INDUCTIVE

JZ4

MIXER DISCHARGE OPENING INDUCTIVE

INDUCTIVESENSOR

MB- (BLUE)

(BLACK)

MA+ (RED)

PLC INPUT B21

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JZ5

JZ5 RELAY COIL

SWITCH INSIDETHE INDUCTIVE

JZ5


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discharge gate touch the limit switch, the relay actuator will action (the relays

coil had got power) at that time relay sent a signal to PLC. The computer will

display the condition of the positions of the cement weighing scale discharge

gate (open or close).

ISOLATION SIGNAL MODULE

RZG-1900S is a single channel signal isolated, transformer and

converter control application. The RZG-1900s accepts DC 420MA or

DC 05V signal. The input signal converted to DC 420MA or DC

010V output signal. The isolation transformer allows the signal to be

operating at separate ground potentials. This prevents ground loops

from the circuits.

The isolation transformer and converter need a separate DC 24V

power supply. The isolation transformer and converter provide

isolation between the input, output and the power supply.

When the power is supply to the isolation transformer and

converter, the power indication LED will show the green light.

JZ6

LIMITSWITCH

JZ6 RELAY COIL

JZ6

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PLC INPUT A22

MA+ (RED)

(BLACK)

MB- (BLUE)

CEMENT DISCHARGE LIMIT SWITCH


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WIRING CONFIGURATION

87 6 5

2 431

Air unit (Pneumatic filet/pressure regulator/lubricator combination)

The Air unit (three components) contain air- filter, air-pressure adjust and oil


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mist supply maintenance. The air unit of the three components is connecting

with nothing pipe. It is an important device for the air pressure supply.

The air-filter is a device for dust and water filter so to improve the quality of

the air supply and avoid the water and the dust to go inside to the air-valve and

the cylinder.

The air pressure adjust is for just the pressure of the air supply .we can

adjust the pressure at 0.5MPa, because the air compressor is start running

when the air pressure is dropped to 0.5MPa so the pressure will keep

stabilization to make sure the material weighing is accurate weighing.

The oil mist supply is to supply the oil in mist state inside the pipe to the air

control valve and cylinder to lubricate the moving part.

You must empty the water before the water is full around the water filter

element inside the water cup.

You will pull the knob on the device before adjust the air pressure and then

you can adjustable the air pressure, after adjust the air pressure you will press

the knob again so to lock the position of the adjust handle. When you adjust the

knob handle by the clock rotation the air pressure supply will increase and the

opposite the clock rotation the air pressure supply will decrease. When you

adjusting the air pressure, you would have better adjust the knob handle slowly

by slowly.

When the outlet air pressure is decrease to supply, you would have better to

replace the water filter.

The oil inside the oil supply cup should be not more than 8/10 capacity of

the oil cups capacity.

The oil quantity supply indicator position is show between the top of the oil

mist cup and beside of the cup (there is a mark of the triangle position at the

frame beside the oil cup and there is number from 0 to 9 at the top of the oil mist

cup).The number 9 point to the triangle position at the frame beside the oil cup

is the biggest supply oil mist to the air control valve and the cylinder, the

number 0 point to the triangle is the smallest oil mist supply.


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Trouble shooting

Aggregates can not weigh when operation is proceeding.

1. Check whether the air- compressor starts or not.2. Check the air-compressor outlet supply air vale open or not.3. Check whether the air pressure is between 0.40.6MPa with the air

pressure measure equipment (facilities) has been set up on the three

components (air unit) or not.

4. Check the aggregates weighing discharge gate open or not.5. Check whether the electric magnetism valve of the air vale block action or

not by press the button on the air vale block to test if the air valve in good

condition.

6. Check whether DC 24 v to the air vale block electric magnetism coil or not.7. Check the relay (relay 1---4) is action or not (the coil of relay has got power

or not) and the contactor point is touch in good condition or not.

8. Check the air vale block coil is broken or not.9. Check the cylinder is in good condition or not.10.Check whether the proceeding is in the semi-auto or auto running state.11.Check whether the enough aggregates inside the material storage bin or not.12.Check whether the output signal of the PLC to the relay or not.13.Check whether the fuse broken or not.Aggregates weighing scale discharge belt can not running

1. Check if the proceeding in semi-auto or auto running.2. Check whether the mixer a batch of the material inside (memory) or not.3. Check whether the mixer discharge is fully closed or not.4. Check whether the aggregates weighing has been finish or not.5. Check whether the contactor in good condition or not.6. Check whether the relay action or not.7. Check the motor of the belt driver.8. Check the relative part of the machine.9. Manual operation must not be in a batch material memory state.


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Cement scale can not weigh.

1. Check whether the cement scale discharge gate is fully closed or not(check whether the cement scale discharge gate is closed or not on

the software in the computer).

2. Check whether the air pressure between the 0.40.6MPa with the airpressure measure equipment (facilities) has been set up on the three

components.

3. Check whether the inductive switch (closed switch) in good condition or not.4. Check whether the contactor in good condition or not.5. Check whether the relay in good condition or not.6. Check the motor.7. Check the cement weighing conveyance screw in good condition or not.8. Check anything material block inside the cement conveyance screw.9. Check the relative part of the machine.Water can not weigh

1. Check the water supply valve is open or not.2. Check anything material block inside the water pump or not.3. Check the relay and contactor.4. Check the drive motor and other relative part of the machine.Mixer discharge gate can not open.

1. Check whether the air-compressor in a good condition or not.2. Check whether the air pressure between 0.4-0.6MPa or not.


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3. Check whether the mixing time has been finish or not (It is refuse dischargewhen mixer time is account).

4. Check whether the mixer discharge in the PAUSE state.5.Check whether the air vale block action by press the button

on the air vale block to test if the air valve in good

condition.

6. Check whether the power DC 24 v to the air vale block electric coil.7. Check the air vale block electric coil is broken or not.8. Check the relay is action or not (the coil of relay has got power or not) and

the contactor point is touch in good condition or not.

9. Check the cylinder is in good condition or not.10.Check the relative part of the machine.

The weighing scale display 0 Kg, but the material has been weighing

inside the weighing scale when the operation is proceeding.

1. Check whether the scale has been the zero setting by mistaken when thematerial has already inside the weighing scale or not.

2. Check whether the scale has been the terminal point setting by mistakenwhen nothing standard weights inside the weighing scale.

3. Weighing scale proofread.4. Check whether the fuse broken or not.5. Check the power supply to the weighing scale load cell.


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6. Check the cable from the weighing scale load cell to the operation cabin.7. Check the power supply to the isolation signal module.8. Check the weighing scale load cell.9. Check the isolation signal module.10.Check the AD041 module.11.Check the CPU module of the PLC.

The software of the YHZD-25 CONCRETE MIXING PLANT is inside the

computer D:\ YHZD-25

In this folder include the folder of 07 50 , ocx Folder .

If someday in the future, somebody to reset up the window xpsp3, you

must first enter the regional and language options to install files for East

Asian languages so that the windows can display the Chinese language

(Start----setting-----control panel------regional and language options----------

Languages----install files for East Asian languages-----Advanced---- language

for non-Unicode programs-----Chinese). Then after reset up windows

xpsp3 ,you should set up 07 50 , follow this step is open the

ocx folder and copy all the file to C:\system 32 \, finallysent the short cut

of the QLB-40.exe to the desktop of the computer, OK, running the program

on the desktop of the computer (short cut).


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GOOD LUCK TO YOU!

YOURS SATISFACTION, OUR SUCCESS


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Appendix

Before starts the machine, you should be do the following

general regulation check.

1. Check whether all the belt of the machine tension or not, if nottension adjust it.

2. Check whether the gear oil, lubrication oil and engine oil inside thegear box and the air-compressor engine oil box ,and check

whether the oil level between the higher level and the lower lever

or not.

3. Check whether the lubrication oil inside the bearing block, if notenough lubrication oil, adding some lubrication oil inside.

4. Check the three-phase power voltage.5. Check whether the block inside the powder conveyance weighing

screw.

6. Draft out the water from the air supply system.7. Check the trail of the aggregate waiting hopper promote, descend

and finished product hopper promote, descend.

8. The general regulation checks must be carried out by industrialelectrician, mechanic and the operator before starts to production.