Your automation network infrastructure is one of your most important assets and if you are like most, you aren't paying much attention to it. But what if the basics fail -- your automation network. What is the cost of that downtime? It can be a simple problem -- a loose connector, moisture in a wire, a failed UPS, a misconfigured router. You should quantify your cost of downtime, per machine, per line, per plant area, etc. Only then, will you really clearly know the return on your investments.
These days, your company is likely focused on two areas -- improving manufacturing performance and reducing downtime. Projects involve integration with business systems to improve the real-time aspects of production management and better production analytics to squeeze additional performance out of the equipment you are monitoring. Both identify and resolve areas of production stress -- the items that impact the reliability of your manufacturing equipment. These are all valuable pursuits and they will, no doubt, deliver improvements in your production and profitability.
But as was said in a song... "The real troubles in your life are apt to be things that never crossed your worried mind: the kind that blindsides you at 4pm on some idle Tuesday."
What might they be? Let's start simple -- that production printer that is left off-line or that ran out of ink or paper. The Storage Disk that filled up. On the more disruptive side -- it's the CD left in a Drive that stops a system from Auto-Booting. The operator that started a video session and stole all available network bandwidth... It's the traveling laptop plugged into an available switch port to access a plc needing maintenance -- exposing your secure network to outside influences. Or, maybe the power fails and you find out your UPS Backup Batteries have aged and can no longer provide the power you need. These are just some of the ways that idle Tuesday can become an expensive nightmare...
The solution relies upon SNMP -- Simple Network Management Protocol, a communications protocol built into most of the IT infrastructure around us. From Printers to UPS Systems, Routers, wireless access points, security cameras, PLCs and the PCs we use in automation. Virtually everything in the IT world supports SNMP communications. It is already there, waiting for your use. And, it is supported over the Ethernet you are already using.
So, what does this all mean? Well, it means you can both monitor and control most of the equipment making up your system infrastructure. You can monitor that printer and make sure it is on-line and has the resources it needs for this production shift. You can monitor for media left in drives or measure the UPS reserve power to make sure it is ready for that power interruption. Plus monitor your network for normal bandwidth so that you can generate alarms on abnormal situations. You can even disable unused ports on a network switch to ensure someone doesn't just plug-in a maintenance laptop without first following procedures to ensure the safety and security of your automation environment.
Monitoring devices via SNMP has typically been the domain of your IT personnel. They have tools such as HP OpenView -- enabling them to discover and monitor the various bits that make up your business infrastructure. But their domain experience generally ends at the business systems. It's the automation engineer that manages the automation networks and the tools that notify operators of impending dangers are in the form of HMI (Human Machine Interfaces) and SCADA (Supervisory Control and Data Acquisition) systems. So, what do you do? You know now that you already have most of what you need in terms of devices that can give you SNMP results, all that's missing is the integration of SNMP data with your existing HMI/SCADA solution.
The missing piece to your existing HMI/SCADA system comes in the form of an Industrial SNMP (iSNMP) driver, similar to your other communication drivers used in your automation system such as RSLinx, ProfiNet, Modbus, etc. An Industrial SNMP Driver will enable your existing automation system to both monitor and manage your automation infrastructure, all the pieces that make up your automation network, the backbone of your plant.
This is not new technology. This is not rocket science. In fact, installing an SNMP communication driver and configuring it to communicate with one device, and integrate with your existing HMI/SCADA as a proof of concept can easily be done in under an hour.
Expansion from there is straight forward and quantifiable. The return on this investment is likely to be the lowest hanging fruit that you'll find for a long time.
The monitoring of your network infrastructure will become more commonplace in the coming year. Most major HMI/SCADA vendors are close to offering SNMP and a simpler "Ping" driver enabling the monitoring and management of your infrastructure from with-in your exiting supervisory system. Industrial Switch vendors will also be delivering an SNMP and Ping solution, enabling their products to be easily integrated with SCADA solutions. The next step is yours -- raising the priority to monitor one of your most important assets, your automation network infrastructure.
Roy Kok is the Vice President of Marketing and Sales for Kepware Technologies. Kepware develops communication drivers to automation controllers, I/O and field devices. Their software is available in both OPC and embedded device communications. www.kepware.com