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Interfacing automation devices for facility management
For industry, system and ICT integrators
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Industrial automation devices, machines and PLCs communicate among themselves using specific application protocols, which are often proprietary. When it is necessary to integrate this equipment into an ICT network for facility management, linking these two worlds appears to be nearly impossible. ICT systems normally use IP-based protocols such as SNMP, while industrial automation devices still make widespread use of serial protocols (RS232, RS485, etc.) or dedicated IP protocols designed for purposes other then facility management. What is needed is an essential “missing link”: simple, neat and efficient.
In this scenario, an existing IP network infrastructure is already in place and all network equipment and facilities are monitored centrally by an SNMP manager.
An eWON 500, configured as an SNMP agent, is used as a front end to interface I/O blocks (in Modbus RTU), machines or PLCs (in the controller protocol) or any desired measurement devices. The eWON 500 polls the devices for data and stores the data in its memory. Once the data is in memory, it checks the data for the presence of an alarm condition. The eWON MIB shows the SNMP manager application how to access the variables in read/write mode. If a variable exceed a pre-defined alarm threshold, the eWON 500 issues a trap to the SNMP manager, notifying the alarm condition.
With a library of serial and Ethernet protocols for interfacing to equipment from major PLC and device manufacturers in the automation market, such as Siemens, Rockwell Automation, Schneider Electric, Omron, Vipa, Wago and many more, eWON technology brings process control within reach of ICT supervision. Not only the PLC, but also the process variables can be monitored by an SNMP manager.
Featured product
The choice here depends on the device that needs an SNMP agent service:
From firmware version 5.6s2 onward, every eWON unit features a new, embedded dedicated SNMP IO server that allows the eWON unit to poll any SNMP v1 device on the network. It enables both read and write operations on 32-bit objects. SNMP consists of a set of standards, including an application layer protocol and a database schema. As an SNMP client, the eWON unit can be used to monitor the bandwidth usage of routers and switches port by port, as well as device parameters such as memory, CPU load, etc. The eWON unit concentrates all this information in its MIB.
In this scenario, the eWON unit forms the essential link between the automation and ICT worlds, providing an SNMP interface that is not common in the automation world. With this unique interface, eWON technology streamlines the integration of automation devices in IT projects. In addition to saving time and effort, eWON technology makes these integration projects possible and affordable.
SNMP agent for PLC variables and I/Os
In this scenario, an existing IP network infrastructure is already in place and all network equipment and facilities are monitored centrally by an SNMP manager.
An eWON 500, configured as an SNMP agent, is used as a front end to interface I/O blocks (in Modbus RTU), machines or PLCs (in the controller protocol) or any desired measurement devices. The eWON 500 polls the devices for data and stores the data in its memory. Once the data is in memory, it checks the data for the presence of an alarm condition. The eWON MIB shows the SNMP manager application how to access the variables in read/write mode. If a variable exceed a pre-defined alarm threshold, the eWON 500 issues a trap to the SNMP manager, notifying the alarm condition.
Advantages
With a library of serial and Ethernet protocols for interfacing to equipment from major PLC and device manufacturers in the automation market, such as Siemens, Rockwell Automation, Schneider Electric, Omron, Vipa, Wago and many more, eWON technology brings process control within reach of ICT supervision. Not only the PLC, but also the process variables can be monitored by an SNMP manager.
Featured product
The choice here depends on the device that needs an SNMP agent service:
- Siemens S7-300 or S7-400 or VIPA systems with MPI connectivity: eWON 500 MPI (ref. EW05261).
- All serial or Ethernet devices or PLCs (Modbus RTU, DF1, Uni-Telway, FINS over Hostlink, ASCII over RS-232, etc.): eWON 500 (ref. EW05201).
SNMP client for monitoring
From firmware version 5.6s2 onward, every eWON unit features a new, embedded dedicated SNMP IO server that allows the eWON unit to poll any SNMP v1 device on the network. It enables both read and write operations on 32-bit objects. SNMP consists of a set of standards, including an application layer protocol and a database schema. As an SNMP client, the eWON unit can be used to monitor the bandwidth usage of routers and switches port by port, as well as device parameters such as memory, CPU load, etc. The eWON unit concentrates all this information in its MIB.
Conclusion
In this scenario, the eWON unit forms the essential link between the automation and ICT worlds, providing an SNMP interface that is not common in the automation world. With this unique interface, eWON technology streamlines the integration of automation devices in IT projects. In addition to saving time and effort, eWON technology makes these integration projects possible and affordable.
