Greetings to all, I am a Mechanical Engineer with extensive experience in sensor wiring for PLCs and interpreting electrical drawings for troubleshooting. Despite not having recent PLC programming experience, I am proficient in ladder logic and familiar with Matlab. Currently, I am planning a home automation project that involves purchasing a PLC, a flowmeter, and solenoid valves. I am seeking recommendations for reliable brands suitable for outdoor use in damp conditions. The project involves automating the process of measuring out 100L of water into a holding tank, adding detergent with a peristalsic pump, and operating a 4kW motor to wash a plant. I am looking for a flowmeter with 5-10L per min capacity and 5% accuracy for this setup. Additionally, I will need a PLC that is easy to program and offers good online support. Considerations for a hinged front access box to protect the PLC from the elements during winter are also important. I am confident in my ability to handle the electrical aspects of the project and use relays if necessary.
In the water and wastewater industry, Click and Click Plus PLCs are commonly used due to their affordability, high performance, and complimentary software. To enhance their reliability, it is recommended to utilize interposing relays for the transistor outputs. The only reported failures of these PLCs have been attributed to lightning strikes. For more information on Click Plus PLCs, visit the AutomationDirect website.
I agree with OkiePC that using the click function is likely your best option, even if you opt for one of the cheaper clones like mitsubishi; the software isn't free. One suggestion for improving the steps is to use an integer variable in increments of 10 instead of relying on internal memory bits to control the step sequence. This allows for easier modification and addition of steps when needed. For example, setting Step 0 as IDLE (nothing running), Step 10 as Start process (startup routine), Step 20 as opening valve 1, Step 30 as running pump 1, Step 40 as counting pulses and comparing to the required value, Step 50 to stop the pump when the value is reached, Step 60 to close the valve, Step 70 to wait for a set time period, and Step 80 to return to Step 20 once the time is up. By implementing this system, valve 1 will open if the step tag is between 20 and 60, and the pump will run if the step tag is between 30 and 50. To add an additional step, simply insert it between existing steps. For instance, if you want to add a trickle valve across Valve 1 to slow the pulses when it nears the required value, insert new steps between 30 and 40: Step 35 to open valve 2 and close valve 1, then adjust the comparison at Step 60 to refer to valve 1 as Step 35 and add valve 2 opening between Steps 30 and 40.
Looking for a MicroLogix 1100 for your custom system? Consider checking out the used market, such as eBay, for cost-effective options. The software used to program this PLC is top-notch, making it a popular choice among users. Whether you choose to purchase from eBay or a surplus site, remember that the cost of hardware is relatively low compared to the time saved by using this efficient software. When it comes to programming, @parky has great suggestions for optimal operation and diagnostics. Remember to separate sequence logic from business logic to ensure smooth functionality. For a unique system, get creative with the 100L batching requirement by implementing a balance beam with a 25:1 lever ratio. Consider using a proximity sensor for precise stopping points. While flowmeters are a viable option, a flowmeter with a pulse counter and K factor would provide more accurate results. Keep in mind the water temperature specifications and consider various options for measuring flow accurately. As an ME, you understand the importance of calibration for flowmeters to ensure accurate readings. Remember, beauty is subjective, so choose the design that aligns with your preferences and requirements.
Great suggestions thus far. I have been considering implementing a Click or Productivity plc for some time now, but have not found the right project for it yet. Given that you are refilling a tank and bringing up a drain valve after each cycle, would it be more practical to use a basic level sensor instead? Using a float switch would offer more precision if you are starting with an empty tank each time, particularly for the initial run, compared to a flow meter. If you desire to upgrade and adjust the water volume, an analog level sensor could be a viable option.
In a forum discussion, user drbitboy recommended considering a MicroLogix 1100 PLC, which can often be found on sites like eBay for a good price. The software for programming this PLC is top-notch, making it a great option for a one-time project. If cost-saving is a priority, purchasing from eBay or a surplus site is worth considering, although the value of your time should also be taken into account. User parky's suggestion for the program is praised for its operational efficiency and diagnostic capabilities, allowing for easy modification and troubleshooting. For those looking for a visually appealing solution, an alternative option is suggested. Regardless of the approach chosen, it is crucial to separate the sequence logic from the business logic within the program. The discussion also touches on a unique solution for a 100L batching requirement, involving a balance beam setup with specific water measurements and a proximity sensor. This discrete system eliminates the need for analog components, with the focus on precise timing rather than flow rate accuracy. Additionally, the mention of mains water reaching temperatures of 80-90°C raises questions, with the user clarifying that the water is preheated overnight by a water heater for a cleaning process the next morning. The water is not pumped but rather flows out under mains water pressure. Future plans may involve more complex processes, such as a cold rinse after the hot wash cycle.
Hi there! Based on your requirements, I would recommend a Siemens S7-1200 PLC for this project. They are very reliable, relatively easy to program, and have excellent online support. For the flowmeter, Endress+Hauser Proline Promag might be a suitable choice, given its accuracy and capacity. Moreover, they handle damp conditions remarkably well. When considering brands for your solenoid valves, look at ASCO or Parker for their reliability. For your PLC protection, check out Rittal enclosures, they offer hinged front access boxes resistant to harsh environments, ensuring good protection during winter. Always remember, don't make a compromise on the quality of your relays, Schneider Electric offers great products suitable for such projects. Best of lucK!
Your project sounds fascinating and quite complex! Given your damp conditions and requirement for outdoor use, waterproofing is going to be critical. I recommend Siemens for PLC with their Simatic S7 range being widely used and featuring impressive support online. As for flowmeters, check out Endress+Hauser; their Proline flowmeter series might fit your bill. These have been used with significant success across a range of industries and despite often being costly, their durability justifies the price tag. Solenoid valves from ASCO come well-sealed for outdoor use and should serve well for your needs. Lastly, Rittal or Hammond may offer the protective enclosure you're looking for with options for pre-installed heating elements to guard against winter conditions. Always remember to check if these brands are suitably certified for your region. Good luck with your project.
Great to see you venturing into a home automation project, that's definitely an area of growth in engineering these days. Based on your requirements, I would recommend ifm electronic's flowmeters, as I've found they offer good precision and durability. As for a PLC, you might want to look into Rockwell's Allen-Bradley or even Siemens, both popular choices with strong online documentation and support. They're pretty user-friendly, especially if you're familiar with ladder logic. For a protective enclosure, Rittal might be a good bet - they make a wide range of sturdy cabinets that can face harsh conditions. One other suggestion would be to consider the use of waterproof connectors for all your wiring needs to add an extra level of protection from dampness. It will give your setup a longer life, especially through outdoor winters. Good luck with your project!
✅ Work Order Management
✅ Asset Tracking
✅ Preventive Maintenance
✅ Inspection Report
We have received your information. We will share Schedule Demo details on your Mail Id.
Answer: - Answer: Some recommended PLC brands for such conditions include Siemens, Allen-Bradley, and Schneider Electric due to their reliability and durability in harsh environments.
Answer: - Answer: For a setup like yours, consider a flowmeter with a capacity of 5-10 liters per minute and 5% accuracy to ensure precise measurement and control.
Answer: - Answer: Ladder logic is commonly used for PLC programming in home automation projects, and it is user-friendly for those familiar with electrical drawings. Look for a PLC model that offers easy programming interfaces and good online support for assistance.
Answer: - Answer: Consider using a PLC with a hinged front access box to protect it from the elements, ensuring its functionality and longevity, especially in damp conditions during winter.
Join hundreds of satisfied customers who have transformed their maintenance processes.
Sign up today and start optimizing your workflow.