Profibus system engineering and monitoring - Andy Verwer
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The document discusses the practical aspects of PROFIBUS, PROFINET, and IO-Link, emphasizing the importance of health checking, fault finding, and permanent monitoring of these systems. It highlights various tools available for 24/7 monitoring, including the Combricks system, which enables real-time network health reporting and engineering access through standardized protocols like OPC and FDT. The document also details setup requirements, including the need for access points, modular networking, and device replacement procedures without system downtime.
Profibus system engineering and monitoring - Andy Verwer
- 1. PROFIBUS System Engineering and Monitoring Andy Verwer, Verwer Training & Consultancy Ltd Accredited PI Training Centre PROFINET, PROFIBUS and IO- Link Seminar Siemens Manchester, 9th November 2016
- 2. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 2Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Facilities for health checking and fault finding on PROFIBUS systems are essential. Access points must be provided on every segment of every network. (Piggy-back sockets). Tools and accompanying training are essential. Network layout should allow devices to be replaced without shutting down the network or disturbing other devices on the network. Replacement of devices should, if possible, not require re- configuration of the system. Health checking should be carried out at regular intervals to detect degradation of performance, deteriorating communications and developing problems. Health Checking and Fault Finding
- 3. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 3Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Permanent Monitoring Health checking takes time and can only show degradation at the time of the health check. How much better to integrate the health checking tools into the network? To give permanent monitoring of system health. Automatically report failures. Give pre-warning of impending failures and performance degradation. A number of tools have appeared on the market which are designed to be permanently connected to the network to provide 24/7 network monitoring.
- 4. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 4Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Permanent monitoring tools PROCENTEC COMbricks (Monitors up to four separate networks with 20 DP, Fibre- Optic or PA segments) Indu-Sol’s INspektor network monitor (one DP segment) Softing’s PROFIBUS Monitor (one DP segment) PROCENTEC diagnostic hub (five DP segments) Siemens diagnostic repeater (three DP segments)
- 5. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 5Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 COMbricks COMbricks is a modular repeater and gateway system from PROCENTEC with built-in ProfiTrace functionality accessible over Ethernet. COMbricks provides: Networking, PROFIBUS DP and PA, PROFINET, Ethernet, copper and fibre-optic connection. Monitoring ProfiTrace OE built-in and accessible over Ethernet (web based). Control Remote IO capability allowing low cost control and plant monitoring over the network.
- 6. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 6Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Head Station with ProfiTrace built in Repeater modules with optional ‘scope and redundancy PROFIBUS DP slave modules IO modules digital, relay, analogue etc. PROFINET IO device modules Optical link modules (1 or 2 channel) mix and match to produce the required functionality The Modules available include: PA module Coupler and/or MBP monitor with ‘scope COMbricks
- 7. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 7Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Head Station Each of the 4 segments can have up to 31 devices connected. But each channel can be connected to a separate network if desired, allowing up to 4 separate networks to be monitored simultaneously. 2 channel repeater 2 channel repeater ProfiTrace - built into the head station monitors all 4 segments simultaneously. Accessible remotely over Ethernet. Example 1 – 4-channel hub/monitor We have built a 4-channel DP hub which divides our network into 4 segments. DP (RS485) DP (RS485)
- 8. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 8Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Example 2 DP/PA coupler/monitor 1 channel ‘scope repeater Head Station PA coupler module This unit can be used as a stand-alone DP/PA coupler with both DP and PA segments monitored by the head station. The unit acts like a transparent link allowing high-speed DP operation (up to 1.5Mbit/s) Ethernet DP (RS485) PA (MBP) The same unit can also simply be configured to just monitor the signals on an existing coupler or link. These modules incorporate an oscilloscope function providing remote waveform visualisation and bar chart.
- 9. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 9Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Multiple network monitoring Each COMbricks unit can monitor up to four different networks, each running at different speeds. Each network can incorporate DP (RS4845), PA (MBP) or Fibre Optic (FO) connection via plug-in modules Up to 20 segments can be connected to a single Head Station. Multiple COMbricks units can be incorporated into a factory or plant. Centrally located reporting can be used to provide 24/7 monitoring and health checking.
- 10. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 10Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Engineering Access Engineering access to the networks and devices is essential for: Setting up new/replacement devices; Configuring equipment; Accessing device parameters and diagnostics. Such access can be achieved in a number of ways: Direct (local) or centralised (remote) access, over the network; Manufacturer specific interface/software; Open standardised, vendor-independent methods. Open methods have the major advantage that the same software, tools and methods can be used on all supporting equipment.
- 11. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 11Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 OPC Originally standing for “Object Linking and Embedding for Process control”, OPC has become the main standard for data sharing in distributed control and monitoring systems. OPC is almost universally used for accessing process and engineering information on automation and control systems. OPC is actually a set of open standards administered by the OPC Foundation (www.opcfoundation.org). OPC servers provide read/write access to data which they hold. OPC clients can remotely access the data in a vendor independent way. There are thousands of different OPC servers and clients available.
- 12. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 12Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 FDT/DTM Another widely-used standard is the “Field Device Tool” (FDT) standard. This defines an open standardised framework for engineering tools that are used in automation and control systems. FDT tools are low cost (can be free!) and provide manufacturer independent access to a wide range of devices. FDT tools require “Device Type Managers” (DTMs) to access the data within devices. There are two different types of DTM provided (usually free): Communications DTMs (CommDTMs) – establish a communication route to the devices. Device DTMs – to access data within a particular type of device.
- 13. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 13Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Simple web browser 07 November 2016 ProfiTrace streaming FDT/DTM Tools OPC / SCADA access Alarm handling Remote monitoring via Ethernet COMbricks unit
- 14. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 14Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 Our Demo For our demo, we have a COMbricks unit consisting of a head station, A DP repeater module and a PA coupler/link module: 1 channel ‘scope repeater PA coupler module Ethernet DP (RS485) PA (MBP) The Head Station monitors both the DP and PA segments via the built-in ProfiTrace, which communicates via standard Ethernet. The DP repeater module and PA coupler/link module together make a transparent DP/PA coupler which provides access to the PA devices for the controlling master. • And provides access for the FDT tools via the built-in commDTM. • And provides OPC server access for network performance statistics and data.
- 15. PROFIBUS System Engineering & Monitoring, Andy Verwer, page 15Practical Aspects of PROFIBUS, PROFINET and IO-Link, November 2016 FDT/DTM • The FDT provides a standardised framework in which the required DTMs can be loaded and run. • The device DTMs operate underneath the CommDTM in order to provide a route to the devices. CommDTM Device DTMs DP PA COMbricks transparent coupler and Ethernet gateway Devices Ethernet