WEFTEC 2010 New Orleans, what a great show!

The show started off in its usual fashion – introductions, leads, demos and apparently for New Orleans little sleep and a lot of people talking about the fun they had the night before.  This year’s WEFTEC was easily surpassed previous years, with over 17,500 people attending and 984 exhibitors.  The exhibit hall itself was nearly a mile long end to end.

There was a lot of chatter this year about energy efficiency, sustainability and the wastewater infrastructure. A big ticket issue was the EPA’s new Clean Water and Drinking Water Infrastructure Sustainability Policy. This of course ties right into our philosophy – save operating and energy cost, work towards a sustainable water infrastructure and become greener through conscientiously managing your pump stations more efficiently.

Overall the show was amazing, we had great booth traffic, awesome help from Brendan’s reps – Coastal and Odessa Pumps, Hydra Service, Automatic Engineering Inc., Pete Duty and Associates, Instrument and Supply, and Nedrow and Associates. And of course our very own MultiTrode crew, Sandy in particular who did a great job organizing and coordinating WEFTEC 2010.  We are looking forward to taking on The City of Angels at WEFTEC 2011!

General News DuoProbe, efficiency, environmental, MultiSmart, probe, pump station, Pump Station Management, Pump Station Optimization, SCADA, WEFTEC

MultiTrode’s MultiSmart Pump Station Manager is the next generation of technology for water and wastewater pump stations – combining the best of PLCs, RTUs and pump controllers into a comprehensive and intuitive package.

MultiSmart has the capability of calculating efficiency based on 3 measured variables:

1. Supply Voltage
2. Current
3. Flow

Knowing these 3 variables enables the Operator to calculate gallons per kilowatt Hr (gal/kWhr).

MultiSmart Firmware Version 2.3.0 includes a groundbreaking advancement, Alternation by Efficiency, the ingenious derivative of MultiSmart’s gal/kWhr ability!

In order to save energy costs, this mode is especially useful where an old pump, scheduled for replacement, is coupled with a new pump.

The Old Way:

Create an N to 1 ratio based on the most efficient pump, allowing the most efficient pump to run N (N is user adjustable) times more than the least efficient pump.

The Problem:

1. Although pump efficiencies begin to equalize, the alternation mode is continues to favor one pump over the other because N to 1 is an absolute comparison.
2. When implemented, some stations experience a high number of starts per day on the most efficient pump which adversely affects the efficiency of new pumps.
3. Not all systems are set up the same. Therefore, there’s a need for indication of the currently active alternation scheme.

MultiTrode’s Solution:

MultiTrode is committed to R&D, continually working on product improvement and new product developments, responding to ideas and feedback from customers.

Our team of highly qualified R&D engineers set their sights on addressing these shortcomings, focused on making O&M jobs easier and elating our Customers.  There is we did:

1. MultiTrode created an Efficiency Deadband (%). This allows for a standard alternation scheme to occur whenever the efficiency of the pumps fall into the Efficiency Deadband. If the difference in efficiency exceeds the Efficiency Deadband, the station will resume the N to 1 ratio favoring the most efficient pump.
2. MultiTrode recommends setting the Station Optimization feature of Max Starts per Hour on each pump.
3. For ease of reference, a database tag was created to indicate when the regular alternation scheme is active in the Pump Alternation Efficiency Mode.

Written By:
Jimmy Hidalgo
MultiTrode Applications Engineer
May 14, 2010 Read more…

General News Efficiency Deadband, most efficient pump, MultiSmart, PLCs, Pump Alternation Efficiency, pump controllers, pump efficiency, Pump Station Manager, RTUs, Station Optimization, wastewater pump stations

MultiTrode’s MultiSmart Pump Station Manager is the next generation of technology for water and wastewater pump stations – combining the best of PLCs, RTUs and pump controllers into a comprehensive and intuitive package.

MultiTrode’s commitment to R&D is evidenced by the MultiSmart Firmware 2.3.0 Release. This groundbreaking advancement includes numerous technological achievements including data logger enhancements to ensure make accessibility even easier and capabilities even better.

Noteworthy Data Logger Improvements include:

• Crisis Logging – When a configurable Crisis event occurs, values of configured tags are saved to a log file for a User-programmed set of time before and after the crisis. This is an excellent troubleshooting tool. For example, if you receive a Motor Overtemp Fault, you can log the motor currents for 30 seconds before and after the fault.
• Interval Logging – Specific log entries can be stored at periodic intervals. Additionally, these can be configured to trigger a DNP event. This is excellent Trend Analysis tool useful SCADA software, Excel or any trending software.
• Configuration Logs – Any configuration changes are saved to the Configuration Log. If security is enabled, then the username is recorded along with the change. For security-conscious organizations, this is an indispensable security tool.
• Field Comments Logging – This novel features allows you to add Comments to the History Log easily and quickly. For example, configuration changes can be accompanied by a quick note of explanation.
• Enhanced CF Card Options – Save logs to a compact flash card including:
• Configuration Logs
• Device Information Logs (including IP Address, Serial Number, Enable Code, Hardware Version, Firmware Version, DSP Version, etc.)
• Interval Logs
• System Logs
• History Logs

With such valuable information at your finger tips, determining why a specific event occurred will be as simply as reading a log… Perhaps someone changed the configuration: You can see exactly who changed what. Was there a reason for the change? Did they write a Comment? Don’t have time to deal with this now? Just save all the logs to the CF card and look at them later from the comfort of your office.

What could be easier -

Written By:
Jimmy Hidalgo
MultiTrode Applications Engineer
May 11, 2010 Read more…

MultiTrode News Configuration Logs, Crisis Logging, data logger, Enhanced CF Card Options, Field Comments Logging, Interval Logging, MultiSmart, Pump Station Manager

Using the compact flash port of your MultiSmart unit and a CF card is the easiest way to upgrade the firmware.

Simply:

• Download the firmware to your computer and unzip the file.
• Look for the file named update.img.
• Use a flash card reader/writer to copy the file to the flash card. (You can purchase a USB compact flash reader/writer from MultiTrode or other sources.)
• Insert the compact flash card into the MultiSmart unit and restart (press Settings->More->More->Restart).
• The unit will use the upgrade image to save the latest firmware automatically
• Press the yellow “Save CF Data” button on your MultiSmart unit before ejecting the CF card. Failure to do so may result in data corruption and/or damage to the CF card.
• We recommend that you erase the update.img file from the CF card after upgrading all units that you need to upgrade. 

Read more…

General News Firmware, MultiSmart, MultiTrode, updgrade firmware

If you haven’t created a user account, please take a few moments to do by clicking on the Sign Up box in the top right of the multitrode.com homepage.

When you get to the Newsletter Signup section, don’t forget to select the box reading “Please give me access to the free MultiSmart firmware upgrades and release information.”

Your request will be processed within 24 hours.

If you already have a user account, and are logged in, you will see “Edit my account details” at the top right of the web page. Click on this, and check the box which reading “Please give me access to the free MultiSmart firmware upgrades & release information.”

 Complete the other details requested and click the Submit button. Your request will be processed within 24 hours. Read more…

MultiTrode News Firmware, firmware upgrades, MultiSmart, MultiTrode

At MultiTrode, we put our money where our mouth is!

World Leader
MultiTrode is a world leader in control systems with satisfied customers in thirty-five countries worldwide.

15% of Revenue Committed to Research & Development
MultiTrode continues to develop technically advanced products and systems. Our team of highly qualified Research & Development engineers designs and develops products that are focused on making the job easier for operations staff and municipal management in water and wastewater organizations throughout the world.

MultiTrode is continually working on product improvement and new product developments, responding to ideas and feedback from customers.

Worldwide Service and Support
We provide service and support to our customers wherever they are located, either directly or via our network of Channel Partners.

Case on Point
The MultiSmart range of products is the result of a $5M development project and over 20 years of experience in control and monitoring technology for water and wastewater Pump Stations.

The MultiSmart Pump Station Manager incorporates an advanced lift station controller, a flexible and open RTU, a PLC, voltage, energy and current monitoring and other control panel components – all in one unit. Its intuitive interface for operators and engineers means no programming is required. Instead, station performance is adjusted by turning on features and changing parameters.  Read more…

MultiTrode News control panel, MultiSmart, plc, Pump Station Manager, RTU

A variable-frequency drive (VFD) is a system for controlling the rotational speed of an alternating current electric motor by controlling the frequency of the electrical power supplied to the motor. Variable-frequency drives allow operators to fine-tune their processes while reducing the cost of energy and equipment maintenance. 

VFD’s are quite useful to the water and wastewater industries because they can be used with the pumps, conveyors and drives involved in pumping and aeration applications. For instance, pumping uses excessive energy and cause significant wear-and-tear on equipment. Use of VFD drives enables pumps to accommodate fluctuating demand, running pumps at lower speeds and drawing less energy while meeting demand.

MultiTrode has developed an innovative VFD algorithm which makes it very easy to setup a VFD station. The standard application uses one 4-20mA control loop through each drive. The MultiSmart Pump Station Manager algorithm then provides a smooth power curve as levels are increased and decreased regardless of how many pumps come online.

For example, the lead (duty) pump starts at 50%, and at the level where it is running at 100% the lag (standby) pump starts. A lot of applications would start the lag pump at 50% and keep the lead pump at 100%. What the MultiSmart VFD algorithm does is start the lag pump and bring the speed of both to 75%. (And note that all of these parameters like start speed and level for 100% speed are user adjustable)

Therefore, multiple pumps will always be running at the same speed, and the speed will be adjusted depending on how many pumps are running.

Setup of this module is simple, with only the following values needing to be setup for each pump:

• Start speed, %
• Level at 100% speed

Some additional features help to optimize the station:

• Manual (hand) speed (to ensure that pumps run at full speed for manual/hand mode)
• Fixed speed value and duration if required, e.g. to clear pipes by running pumps at 100% for 10 seconds initially

Read more…

In the well MultiSmart, pump station, Variable-Frequency Drives, VFD, wastewater, water

MultiTrode will be on the road in April…

Texas Water 2010
American Bank Center
1901 N. Shoreline Boulevard
Corpus Christi, TX  78403
4/13/2010 – 4/16/2010
Booth #818

Design-Build for Water and Wastewater
Gaylord Texan Resort & Convention Center
1501 Gaylord Trail
Grapevine, TX  76051
4/19/2010 – 4/23/2010
Booth #208

APWA /OWEA Show
Renaissance Tulsa Hotel & Convention Center
6808 S. 107th East Avenue
Tulsa, OK
4/19/2010 – 4/21/2010
Attending with Automatic Engineering

79th Annual Conference, Short School, and Expo
Hot Springs Convention Center
400 Convention Boulevard
Hot Springs, AR 71901
4/30/2010 – 5/5/2010
Attending with ISI

Please stop by our booths. There you can find out more about MultiTrode Products.

Featuring:

• MultiSmart – The world’s first Pump Station Manager
• The Probe – The most reliable and cost effective liquid level sensor
• SafeSmart Backup Controllers – A complete backup solution

Read more…

MultiTrode News backup controllers, Level Sensing, liquid level sensor, MultiSmart, probe, pump station, Pump Station Management, safesmart

On behalf of the entire MultiTrode Team – we invite you to attend our new educational webinar series.

Current class offerings include:

• Latest Advances in Pump Station Management
• Introduction to the MultiSmart: the World’s 1st Pump Station Manager
• Introduction to Backup Controllers for Lift Stations
• Customized classes also available

Hurry – Space is filling fast!

To take advantage of this extraordinary opportunity, contact Sandy Santiago at 561-994-8090 or sandys@multitrode.com.

After making your reservation, you will receive an email Webinar Invitation with simply to follow instructions. Then sit back in the comfort of your own office while the MultiTrode Team entertain you with tales of technological advancements and features that will make every day in the field seem like a walk in the park! Read more…

General News backup controller, Level Sensing, lift station, MultiSmart, probe, Pump Controller, pump efficiency, pump station, Pump Station Management, Pump Station Optimization, Technical, webinar

Maintenance is defined as “actions performed to keep some machine or system functioning or in good working order.”

The design life of most equipment requires periodic maintenance: adjustments, alignments, lubrication, rotating, parts replacement, etc. Every time we fail to perform routine maintenance, we shorten the equipment’s design life.

Maintenance Approaches

Reactive Maintenance

Defined – Run it until you break it! No effort is made to maintain equipment; manufacturer recommendations are ignored. Also called “Crisis Maintenance” or “Hysterical Maintenance”.

Pros - No manpower hours are expended. No maintenance costs are incurred.

Cons – You may think you’re saving money, but you’re not.  Shortening the equipment’s design life may result in higher replacement costs. You may have an additional expense if you’ve worn down your secondary/backup equipment. Then, there is the element of chance – there is no guarantee that a critical piece of equipment will not fail during peak demand, or during weekend/holiday time.

Preventive Maintenance

Defined - Actions performed on a set schedule that detects, precludes or mitigates degradation of a component or system with the aim of sustaining or extending its design life. Also known as Condition Based Monitoring.

Pros – Although it is not the optimum maintenance program, it is a vast improvement over Reactive Maintenance. Performing manufacturer recommended preventative maintenance will maximize the equipment’s design life. Money will be saved by ensuring the equipment runs as efficiently as possible.

Cons - Risk is increased by human error during the performance of maintenance. You may find yourself conducting unneeded (but scheduled) maintenance. Although the risk of failure is reduced, it will not be eliminated.

Predictive Maintenance

Defined – Actions that detect the onset of failure, thereby allowing causal stressors to be eliminated or controlled prior to deterioration of the equipment. Predictive Maintenance differs from Preventive Maintenance by basing maintenance on need rather than a preset schedule.

Pros – A well-organized Predictive Maintenance program will all but eliminate catastrophic failures. The ability to plan ahead will facilitate inventory/part ordering and avoid overtime cost. Equipment operation can be optimized, energy costs can be reduced and system reliability increased.

Cons – Requires staff training and investment in technology.

MultiTrode Can Help

At MultiTrode, we believe Predictive Maintenance guarantees the best results. Predictive Maintenance, also known as Condition Based Monitoring, is the ideal maintenance strategy because it identifies when assets need to be replaced – allowing the utility to plan cost-effective maintenance.

To ensure that the hydraulic and electrical state of the pump and motor can be clearly monitored, the MultiSmart Pump Station Manager measures the following:

• Flow rates per pump, total volume per pump
• Energy used per pump
• Pup efficiency in gals/kWhr or liters/kWhr
• Insulation resistance per pump
• Supply voltage (all 3-phases)
• Current monitoring (all 3-phases)
• Detailed fault analysis for each pump

For a free MultiSmart demo, email UsSales@multitrode.com.

Learn more about the innovative Level Sensing Probe and intuitive MultiSmart Pump Station Manager at www.multitrode.com. Read more…

Industry condition based monitoring, maintenance, MultiSmart, preventive maintenance, probe, pump efficiency, pump station, Pump Station Management, Pump Station Optimization, reliability

How old is America’s wastewater infrastructure?

Much of the country’s infrastructure was built in the 30 years after World War II. Although age is a key indicator of a system’s health, equally important is the way the system has been maintained. A well-maintained system can operate effectively for a significant period of time.

All products have a life cycle – the clothes you wear, the desk you’re working on, the chair you’re sitting in – everything. The same is true for the nation’s infrastructure, and each of its components:

Components & Life Cycles

Collections: 80-100 Years

Treatment Plants (Concrete Structure): 50 Years

Treatment Plant Mechanical/Electrical Equipment: 15-20 Years

Force Mains: 25 Years

Pump Stations (Concrete Structure): 50 Years

Pump Stations (Mechanical/Electrical Equipment): 15 Years

Interceptors: 90-100 Years

What is the state of the Union?

Among the many challenges facing our water and wastewater systems are:

• Large Capital Investment
• Aging Workforce
• Lack of New Skilled Workers Entering the Marketplace
• Increased Regulation
• Disengaged Public
• Interdependence on the Energy Sector

Estimates of national investment needs range from $300 Billion to $2 Trillion over the next 20 years.

Today’s population is benefiting from the investments made by past generations. Looking forward, the EPA is promoting practices that encourage utilities to address existing needs so that future generations will not be left to rebuild a crumbling infrastructure. This is referred to as “Sustainable Infrastructure”.

The Four Pillars of Sustainable Infrastructure are better management, efficient water use, full-cost pricing of water and a watershed approach to protection. The EPA believes this will help utilities to operate more sustainably now and in the future.

MultiTrode Can Help!

Our technologically advanced products have been developed with system efficiency and easy interface in mind. With the push of a button, our smart pump controllers will help you:

• Promote effective utility management
• Minimize operations cost
• Facilitate effective asset management
• Improve maintenance and capital investment planning
• Reduce energy cost & CO2 emissions
• Increase system-wide efficiency

Learn more about the innovative Level Sensing Probe and intuitive MultiSmart Pump Station Manager. Read more…

Industry efficiency, environmental, Level Sensing, MultiSmart, probe, Pump Controller

MultiSmart Pump Station Manager, with firmware version 2.2.0 onwards, now includes support for easy interfacing of the ABB ACS550 and ACS800 series VFDs. After a study in the US and UK, it was found that the ABB VFD’s are widely used in Pump Station Controls.

ABB - ACS800 Drive

Having support for the MODBUS RTU capability MultiSmart can be interfaced to any VFD’s with MODBUS support for bringing the data in and to send controls to the drives, and these data can be easily brought to a SCADA system. This process is fairly easy and straight forward with the help of the buttons on the MultiSmart faceplate. The only time consuming part is adding the MODBUS points by going through the VFD data sheet.

However, after identifying the customer demands, this integration process is further simplified for selected ABB VFD’s in MultiSmart firmware version 2.2.0, which requires only a few button press. With this feature MultiSmart can now use the currents read from the VFD, instead of current read from the MultiSmart Motor Protection module, for generating the fault alarms.

Even though MultiSmart has the capability to stop the pumps based on faults, these faults are configured only to alarm due to the fact that the VFD will holdout the pumps from running. The relevant motor protection faults, when interfaced to these VFDs, are set to Auto Reset within MultSmart to avoid the need for two resets when the fault is cleared, thereby simplifying the steps involved with the operations.

The MODBUS communication can be either setup over a RS232 or over ethernet. A RS232 to 485 converter is required if the RS232 option is selected. Ethernet communication can be setup using a cross over cable or using a straight through ethernet cable with the help of an ethernet switch.

Read more…

General News, Technical Notes ABB, ACS550, ACS800, MultiSmart

The Blue Ocean Strategy is a great book by Kim and Mauborgne (Harvard Press) that looks at how exciting new  products can be created at the development stage by focusing on uncontested market space.

In the book the authors argue that instead of companies trying to be better than the competitors and fighting over market share they should instead focus on making the competition irrelevant by creating uncontested Blue Ocean market places where new demands of customers are satisfied.  Rather than trying to beat the competition at their own game businesses looking for uncontested space should answer four questions:

• Which of the factors that our industry takes for granted should be eliminated?
• Which factors should be reduced well below the industry’s standard?
• Which factors should be raised well above the industry’s standard?
• Which factors should be created that the industry never offered?

I found the book a good read and like anyone who learns about a new model or concept I wanted to try it out on one of our products at home.  I knew that no-one here had read the book before designing the MultiSmart Pump Station Manager over five years ago so it would be a good test. I am now sitting down and will do my best to answer the four questions:

• What did we eliminate that the industry took for granted?
That is easy. We took away the need to bring in a third party expert to set up, commission or make changes to the configuration of pump control in a lift station. It was all made so easy to use that any operator could be given simple training to do it and save themselves big dollars!

• What factor did we reduce below the industry standard? 
After thinking about that for a while it occurs to me that the MultiSmart reduces the number of moving parts found in any panel or station control box. The standard control panel is full of gear. A MultiSmart takes a lot of that away – up to 14 different devices are eliminated from one panel, maybe more. Again – big savings.

• Which factors did the MultiSmart raise well above the industry standard?
One of the biggest issues for the industry is getting enough data from lift stations and pump station. On average the industry is used to controllers providing less than 50 tags. We saw that as being the big picture for customers. The more information you have to hand the better your decision making. Asset managers are becoming more focused on network management, efficiency, energy and operating costs. Information and lots of it was going to be the key. We upped the ante with the MultiSmart and brought back 500 tags of data (and growing).  This allows greater level of control and monitoring than ever offered before in a controller.

• Which factor did we create that had not been offered before? 
Going back to the book for examples the authors showed how Cirque Du Soleil had solved this by being the first to offer a high level of theatre to their industry (Circus entertainment). That leads me to say that the MultiSmart was the first to offer an out-of –the-box solution for full pump station management. All the hard work has been done for you.  All the smarts come with the unit and we provide free upgrades as we develop them.

You might agree with me on those answers or you might not. My view is that they stand up to some scrutiny but I would love to hear if anyone has a different view. Read more…

General News, Industry MultiSmart, Pump Controller, Pump Station Management

This station is one of the four major stations in Greenwich, CT USA.  It pumps directly into the force main and sees an inflow of about 500 GPM into its very small well. If you would like to see video of the inflow into the well send me an email. If the station were to go down there will almost certainly be an overflow because they have only 20 minutes to respond. The station is equipped with a 2 VFD’s , backup generator,  mixer and a grinder.

The PLC operating the station used PID to keep a constant level in the well but the alternation feature did not work so someone would visit the station everyday to alternate the lead pump via the touch panel. The station used to have a an indicator panel separate from the PLC display that indicated what alarms were present. All three components (PLC, touch panel, indicator) were removed and only a MSU3MP took their place. One of the main reasons the town wanted to undertake the replacement of the PLC’s is the maintenance cost of the PLC programming. Most municipalities outsource the PLC programming. The MultiSmart has enabled them to get rid of the maintenance cost while adding the many features of the MultiSmart into the station.

Greenwich South Panel before installing MultiSmart

It took 4 hours to get the station running on the Colacino Demo unit and 4 days to complete the retrofit. This relatively small demo unit is used by Colacino for retrofits and for MultiSmart demos. It has 30 ft cables coming out of it that were temporarily wired into the panel to keep the station running while the work was performed.

Greenwich South Panel: removed components

Colacino demo unit

Greenwich South Water panel after installing MultiSmart

General News colacino, greenwich, MultiSmart

v2.1 of MultiSmart firmware is now on the website. Take a look at the recent post to find out what is included in this release.

The firmware can be downloaded if you have been given access to the firmware area. Create a login on the main site and request MultiSmart firmware (one of the checkboxes). If you already have a login, click on “Edit my details” in the top right of the main site. Read more…

General News dnp3 security, MultiSmart, PID

v2.1 of the MultiSmart Pump Station Manager will be released in the next week or two. There’s some great new features included as well as lots of small enhancements and cosmetic upgrades:

• PID control, e.g. for constant pressure, constant flow via IsaGRAF
• New comms screen making all the communications much easier to setup
• Smart Outflow calculation to cater for high inflow conditions
• Updated DNP3 security (v2)
• Time to spill calculation on the main screen
• Generator functionality (e.g., run time and starts)

More about these features in later posts.

What else is in v2.1?

Fault finding tool – you can enable DNP3 and Modbus logging on the unit, then view the log on the LCD. We’ll do a post later which shows more about how this works in practice and why it’s useful.

Pump Running by External Control – the display shows when the over-ride is running the pumps (known via contactor auxiliary or currents). The main screen shows External Run next to that pump. And the starts and hours run accumulators also update. Thanks to Todd Burnett from Coastal Process & Steve Lahm from North East Water for requesting it (and maybe others as well).

DOUT from multiple sources – you can already do with this with IsaGRAF or the logic engine, but a few customers requested being able to configure a DOUT from a number of sources without using custom logic. So the user interface lets you choose a number of sources and select the “operator” – AND, OR, XOR.

Station Outflow alarm – there are already flow alarms by pump, this has been introduced to cover the complete station.

Cosmetic improvement - holding down a softkey repeats the keypress – greatly welcomed by anyone who has configured lots of faults and digital inputs for example.

Upgrading – the DSP upgrade is automatic, so you don’t have to remember to do that after a firmware upgrade. And when you put in a CF card with an upgrade image the unit prompts you to do an update.

Extra IO blocks in LCD – the Acromag and Adam IO units weren’t fully integrated into the LCD but now have been. Previously the available IO from external units didn’t show up in some of the settings screens (only in the advanced screens), but now do.

Custom names for IsaGRAF tags – the user can rename any IsaGRAF tag as well as change values, making the process a lot more intuitive. Read more…

General News MultiSmart

We posted a news item on our main site about Trihedral and MultiTrode.

Background

This brief blog post gives a bit of background. Canadian-based Trihedral have been making inroads into the water and wastewater industry – our main market – for some time. From our perspective, we have seen them win a lot of customers in the SE of the USA. They might be winning customers in lots of other areas too.. we’ve just noticed the SE region.

The Florida market has had a major supplier who locked up the customer base with a proprietary protocol. What Trihedral did was reverse engineer the protocol. As a result, the Trihedral VTS platform can be implemented by these customers who can continue to use their existing field hardware but are now free of their restraints! They change their SCADA platform, keep their old hardware (so don’t have to change everything overnight), but they can start using new products.

These customers who have switched to VTS can now introduce any product they want in the field – or the plant – so long as it supports open protocols like Modbus or DNP3. 

The Partnership

That’s the background, but the news item is about what Trihedral have done, in partnership with MultiTrode. VTS will shortly have an “add site” function for MultiSmart.

This function essentially removes a lot of the legwork, or integration, out of bringing a MultiSmart site with 100’s of tags (data points) into the VTS system.

The new version of VTS isn’t quite out yet – expected in February. But I saw a demo of it a few months ago and was very impressed. The MultiSmart pump station manager was on an ethernet link (could have been a radio link) to the VTS SCADA server and the whole process was automated.

The remote MultiSmart site created a compressed version of the XML configuration (we use XML as standard for all configuration files), transmitted it using DNP file transfer (industry standard), VTS loaded it, unzipped it, and presented the user with a few checkbox options for configuration – including graphics, alarms and controls.

I know some of the Florida customers are very keen to get their hands on it. And some of our engineers are very interested in what Trihedral have done.

2+2 is more than 4 – if you choose the right combination

That’s the beauty of working with other companies who are great at what they do and have a passion for making things better! New ideas that spur our engineers on to come up with even more innovation.. and make life easier for the customer. Read more…

SCADA & Telemetry Add new tag, DNP3, MultiSmart, SCADA, telemetry

This follows on from the first blog post on DNP3 where we covered Date/Time Stamping – or Less Guessing - and a little bit of a comparison with Modbus.

This post is about some of the mechanisms for communicating between the SCADA, or master station, and the remote site. By the way, in DNP3 speak, you often hear the term “outstation” for the remote site. We’ll tend to stay with RTU (depending on who you talk to it either means “Remote Telemetry Unit” or “Remote Terminal Unit”), which is essentially the device that communicates.

Polling 

Let’s start with a Modbus comparison again, just to give a little context. Modbus is a totally polled environment – that is, the master station (typically a PLC) requests data from a site. The remote site can’t choose to send some data to the master station, it has to wait until the master requests it. So a very typical arrangement for a collection system is where the master PLC polls each lift station in turn and when it is has finished, starts again.

This has a lot of disadvantages as anyone with a growing network of lift stations has found. The time taken to get around the network goes up and up. You might get to a point where it’s 15 minutes between polls and decide to prioritize certain sites to get polled more frequently, or add a radio frequency (and therefore a new base station and repeater radio) to split the network into more manageable pieces.

It’s not an ideal situation, because Modbus isn’t an ideal telemetry protocol. (It’s a great protocol for other applications).

Unsolicited Reporting

If waiting until the master station asks you how you are doing isn’t the best way, what about unsolicited reporting. What’s unsolicited reporting? The remote site, also known as the RTU, sends data to the master station without being asked.

If you are used to Modbus polling systems, this might sound like anarchy. And if you have every site sending a message every time an event takes place, it could well be anarchy. Will the radio network stand up to lots of sites all trying to communicate at once?

The only way you might be able to prevent chaos, is by having a very limited amount of data getting sent, or a high radio bandwidth. One of the guys in MultiTrode told me about a system he was involved in with a previous company where they used unsolicited reporting for every event, and during a major storm the entire network shut down due to “collisions” in the radio network. The solution was for someone to go and visit every site and reset each RTU. Then the network started communicating again. But they lost all the data for their critical event.

That’s not great. What’s the solution?

Communication Choices and Different Classes

The DNP3 protocol has some great features to avoid the problems above.

Firstly, you can group events into different classes. Then secondly, you can choose how those different classes communicate from the RTU to the master station.

An example is the best way to explain it. Suppose you want to know about all high level alarms within 1 minute, and otherwise you are happy for all stations to be communicating at least once every 30 minutes.

You would put the alarm “High level” into class 1, and everything else into class 2. Then you would set class 1 to unsolicited reporting immediately. And class 2 you might set one of two ways – either to report every 30 minutes or sooner if the event buffer was full; or you might have the master station polling every 30 minutes.

Now you can find out immediately about high level alarms without risking the network turning into treacle and you still find out about all the changes in your network.

It’s the flexibility in DNP3 that is one of its great features. As Paul Gibson, one of the key people behind the development of the MultiSmart pump station manager, said:

“If we didn’t have DNP3, we’d be trying to design a protocol just like it to put into the product.”

The Communications Network still needs Design

Just because there’s a flexible protocol doesn’t mean you don’t have to do anything. Every communications network needs design. How much data? What is the bandwidth? What are the delays?

Read more…

SCADA & Telemetry DNP3, Modbus, MultiSmart, RTU, SCADA, telemetry