Help me

[LuLu]

HI

Help me plz :worship:

How can I solve this problem???

You are given the following Reverse Osmosis (RO) plant's basic block diagram by

your Technical Manager and are required to come up with a control scheme in

LabVIEW that follows the following structure:

Inputs:

Source Reservoir Level (L1)

Output Reservoir Level (L2)

Pressure at the input of High Pressure pump (P1)

Pressure at the output of High Pressure pump (P2)

Conductivity of the output water sample ©

Outputs:

Control signal to Low Pressure Pump (C1)

Control signal to High Pressure Pump (C2)

Indicator light for Low Pressure Pump being ON (A1)

Indicator light for High Pressure Pump being ON (A2)

Indicator light for Warning State 1 (A3)

Indicator light for Warning State 2 (A4)

Tank levels for both tanks (TL1, TL2)

Strategy:

For any level indicator, Li = 0 means the tank is empty, Li = 1 means the tank is full.

Any intermediate value would give the level in that tank. For pumps, 1 means the

pump is ON and 0 means the pump is OFF. For conductivity, 0 means no conductivity

and represents pure water. C up to 0.1 is acceptable level of conductivity and any

value higher than that means the membrane is not working correctly and needs

maintenance.

1. As the system is turned on, check L1 to be 1 and L2 to be 0. If so, then turn on

the low pressure pump. If not then indicate the state through A3 and A4.

2. Once the low pressure pump is ON, wait for 30 seconds and check P1. If P1 is

>= 3 bars then turn ON the high pressure pump. Otherwise turn the low

pressure pump OFF and indicate appropriately using A3 and A4.

3. If the high pressure pump is ON then wait for 30 sec and start monitoring C.

At any instant, if C > 0.1 then stop both pumps and indicate appropriately

using A3 and A4.

4. While running, at any instance, if the conditions in 1 or 2 also become true

(i.e. L1 = 0, or L1 = 1, or P1 < 3 bars) then stop both pumps and indicate

accordingly.

A1 and A2 are two LEDs connected directly to C1 and C2 respectively indicating the

state of each pump. TL1 and TL2 are two level indicators between 0 and 1, connected

to the tank levels L1 and L2 respectively, and indicate their respective levels. The

warning LEDs have the following meanings:

A3 A4 Meaning

OFF OFF Normal Operation

OFF ON Level Error (strategy step 1)

ON OFF Pressure Error (strategy step 2)

ON ON Conductivity error (strategy step 3)

A3 and A4 should appear as Green in OFF state and Red in ON state. Use a third

LED for power indicator. Use appropriate switches and numeric control inputs for

providing the input values of L1, L2, P1, P2, and C

[Ton Plomp]

Oh and while you are doing LuLu's homework

Could you help me to build a system that monitors every train that passes by on a track (weight, speed, type, number of people carried, temperature, pH, Mood of the driver, coffee spill on the floor, number of non-paying commuters, number of loud-noise MP3 devices, and everyone's credit card details)

LuLu if you don't want to do the homework, quite school

Ton

[Justin Goeres]

Actually, that's a decent design problem. Kudos to your teacher for giving you a relatively practical assignment.

As tcplomp pointed out, we're not going to do your homework for you. However, if you have specific questions about code you've written (why it's slow, what an error message means, etc.) you'll find people here who are happy to help. And when you have a question, posting sample code along with it so we can see what you're doing is invaluable.

Welcome to the board, and good luck with your assignment.

[Anders Björk]

Break down your problems in subproblems and specify what your code should do in each case. Look for similar tasks and reuse code for similar tasks.

[AnalogKid2DigitalMan]

A Mirage of this query appeared at ni

http://forums.ni.com/ni/board/message?boar...hread.id=282778

[marp84]

hai bro where i can find tutorial for control pallete in front panel N function pallete in block diagram? cause some icon i cant find in both of them (see attachment files).please help me.tanx before

[jgcode]

Use Context Help to get name of VI.

Then use the search function on the palette

[marp84]

QUOTE (jgcode @ May 31 2008, 03:11 PM)

Use Context Help to get name of VI.

Then use the search function on the palette

http://lavag.org/old_files/monthly_05_2008/post-10325-1212221418.png' target="_blank">

Tanx Bro