CAS June 2017 Newsletter – Page 2

 

Previous Page

Why Is BACNet Vulnerable

Read more next month.

 

Other Elements of BACnet That Are Vulnerable

Read more in our next edition.
 

The Scale Is Frightening

Read more in our next edition.

 

Case Study: Terra Nova Oil Platform – Fire System

Terra Nova Oil Platform

 
Introduction:
Chipkin Automation Systems working with Notifier Canada implemented a portion of the redundant fire system. The particular focus of Chipkin Automation Systems was the gathering of data from the Notifier Alarm System and the provision of a redundant gateway system which provided detail alarm and trouble information to a Graphical User Interface system. The purpose was to have a single unified GUI to be used for control and monitoring of the complete platform operation. Notifier Canada chose Chipkin Automation Systems to work with because of their experience with protocol gateways and previous experience with Notifier Systems.
 
Background:

Suncor Energy operates the Terra Nova field, which is located offshore approximately 350 kilometers southeast of St. John’s, Newfoundland and Labrador. Discovered in 1984, the field was the second to be developed off Newfoundland and Labrador.

Production from the field began in 2002, through the use of a Floating, Production Storage and Offloading (FPSO) vessel. This was the first development in North America to use FPSO technology in a harsh weather environment.

One of the largest FPSO vessels ever built, the Terra Nova FPSO is 292.2 metres long and 45.5 metres wide, approximately the size of three football fields laid end to end. From the keel to the helideck, it stands more than 18 storeys high. The Terra Nova FPSO can store 960,000 barrels of oil and accommodate up to 120 personnel while producing.
 
Details:

The Platform used the Notifier AM2020 FACP system when originally installed. When refitted in 2006 the system was upgraded to a 2020 NFS system to provide new features and a degree of redundancy. The way that alarms, troubles and supervisory’s are reported by the AM2020 and the NFS3030 is slightly different but the owner wanted the NFS3030 system to mimic the original system. Chipkin Automation Systems originally developed the protocol driver and were able to implement changes to provide the behavior required.

Gateways were connected in a hot standby pair. The Serial cable connecting the FACP to the gateway is designed to bring the same data to both gateways so that each has an identical copy of the state of the FACP. The secondary of the redundant pair operates in a standby mode; monitoring the status of the primary. If it detects failure it becomes the primary and continues to gather and serve data to the Central Monitoring System. If the primary detects a failure in the secondary then it reports that as an alarm.

Fire alarm panel was reported to the Central Monitoring System using the Modbus protocol. There were approx. 700 sensors and devices in the fire system.
 
Terra Nova Oil Platform Underground.gif

 

CAS-2X00-02 CAS-Bridge 1-Wire to Modbus TCP/RTU and IoT  

1-wire-modbustcprtu-iot-board

PRODUCT DESCRIPTION

Chipkin’s CAS-Bridge 1-Wire to Modbus TCP/RTU and IoT, monitors a series of 1-Wire temperature sensors and makes the data available to Modbus devices, as well as logging long term trending data into the cloud. The CAS-Bridge operates by monitoring the 1-Wire temperature sensors and storing the values in an internal database. Then serving the temperature data as Modbus TCP/RTU values. When a value changes or a timeout occurs, the values are sent to an online dashboard for long term trending and logging.The CAS Bridge can be connected to your network with a ethernet connection or by connecting to a WiFi access point.

The gateway requires minimal configuration and can be considered a ‘plug and play’ component of any network system. It’s ready to operate ‘out of the box’ and can be installed without an engineer’s approval. For a list of tested devices, refer to Appendix A: Tested Devices.


note

Note: All gateways sold by Chipkin report operating stats and issues to web pages and maintain logs that can be uploaded by HTTP or ftp.

 

SPECIFICATIONS

The following specifications for the CAS-Bridge – 1-Wire to Modbus TCP/RTU and IoT are common to all CAS Bridge gateways.
  • 10/100BASE-T with RJ-45 connector
  • 1x RS485 port
  • Power: 5 VDC, A battery backup is also available.
  • Operating temperature: -20 to 70 °C
  • LEDs: link, speed/data, power, busy
  • Dimensions (LxWxH): 107 x 63 x 25 mm

 

MAXIMUM NODES SUPPORTED

This table summarizes the number of sensors and devices supported for each protocol node.
Gateway Node Nodes Comments
Client 50* The CAS Bridge has been tested with 50x 1-Wire DS18B20 devices.
The CAS Bridge could support more or less depending on the cabling and distances between sensors.

 

CONNECTION INFORMATION

These tables summarize possible connections from the Modbus RTU server ports.

PORT 0: 1-WIRE CLIENT PORT

Connection type 1-Wire Bus
Hardware interface N/A
Multidrop capability Yes

PORT 1: MODBUS RTU SERVER PORT

Connection type RS485
Baud rates Driver supports: 9600, 19200, 38400 115200 baud
Data-bits Driver supports: 8
Stop-bits Driver supports: 1
Parity Driver supports: none
Hardware interface N/A
Multidrop capability Yes

 

CONNECTION CONFIGURATIONS

This block diagram lists common network connections that can monitor data from 1-Wire devices and Modbus RTU/TCP, IoT protocols.
1-Wire-Modbus-RTU-TCP-IoT-diagram

CONFIGURATION

The CAS Bridges settings can be configured on a Web page. Users can select:

  • Modbus TCP – node_ID
  • Modbus RTU – node_ID, baud rate, parity, data length, stop-bits
  • Modbus Scaling – Scale the tempature values from a float value to a Modbus register.
  • Ethernet IP address – The Ethernet IP address to use if ethernet DHCP is not enabled.
  • Ethernet DHCP – If enabled the CAS Bridge will attempt to use DHCP to obtain an IP address from the local network.
  • WiFi mode – If enabled the CAS Bridge will become a Wifi Access point that can be connected to without a wifi router.
  • Wifi SSID – Used to conenct the CAS Bridge to a wifi access point when the WiFi mode is disabled.
  • Wifi Password – Used to conenct the CAS Bridge to a wifi access point when the WiFi mode is disabled.
  • Wifi IP address – The wifi IP address that the CAS Bridge will attempt to use if wifi DHCP is not emabled.
  • WiFi DHCP – if enabled the CAS Bridge will attempt to use DHCP to obtain an IP address from the clocal network.
  • Online server host – The host to send the tempature data to.
  • Online server private key – The private key that is used when sending the tempature data to the online server
  • Online server timeout – How long to wait before timeing out on a message to the online server
  • Online server limit – How frequently to send the temapture data to the online server.

 

CUSTOMER SUPPORT

The CAS-Bridge – 1-Wire to Modbus TCP/RTU and IoT gateway was developed by Chipkin, and we are proud to provide support for our products. For technical support, sales and customer service, please call us at 1 (866) 383-1657.

REVISION HISTORY

This table summarizes the update history for this gateway data sheet. Please contact Chipkin by phone or email for an updated version of this document.

DATE RESP. DRIVER VERIFIED DOCUMENT REVISION COMMENTS
11-May-17 SWS 1.0.25 0 Document created

 

APPENDIX A: TESTED DEVICES

These tables summarize the Veeder-Root devices that have been tested. Other devices may be supported.

DEVICE TESTED (FACTORY/SITE)
DS18B20 Factory and Site

 

China’s Superlative Bridges

Of the world’s 100 highest bridges, 81 are found in China, including some under construction ones, according to Mr. Eric Sakowski’s data. China now boasts the world’s highest bridge, the longest bridge, the highest rail trestle and a host of other superlatives, often besting its own efforts. Each bridge can cost billions and employ hundreds of workers for several years.They are majestic, they connect impoverished regions. But the fact of the matter is that, many bridges are buried in debt.

As there are more and more bridges being erected across the country, in the name of economic development and country future’s growth, especially as part of a huge stimulus program after the 2008 global financial crisis, a study that Mr. Ansar helped write said fewer than a third of the 65 Chinese highway and rail projects he examined were “genuinely economically productive,” while the rest contributed more to debt than to transportation needs.

 

Chishi Bridge
 
Take the Chishi Bridge (ranks 162nd) as an example. Financed by state-owned banks to state-owned companies, it is a 1.4-mile-long marvel of concrete and steel, cost $300 million to build and was more than 50 percent over the budget. It promised “a fast and convenient access to the sea” for southwestern China. However, like many other bridges, it was faced with delays and tarnished by government corruption. Since it opened in October 2016, it has been overpriced and underused. Most of the villagers can’t afford to pay $3 toll fee to cross the bridge, even more to use the 70-mile expressway it connects.In 2016 alone, China added 26,100 bridges on roads, including 363 “extra large” ones with an average length of about a mile, government figures show. If the infrastructure investments are poorly managed, the nation could be pushed into financial crisis.
 
Jiaozhou Bay Bridge in Qingdao
 
Top Left: Jiaozhou Bay Bridge (or Qingdao Haiwan Bridge) is a 26.7 km (16.6 mi) long roadway bridge in eastern China’s Shandong province. As of December 2012, Guinness World Records lists the Jiaozhou Bay Bridge as the world’s longest bridge over water (aggregate length) at 41.58 km (25.84 mi).
 
Top Right: Duge Bridge is a cable-stayed bridge near Liupanshui in China. As of 2016, the bridge is the highest in the world with the road deck sitting over 565 metres above the Beipan River. The bridge spans 1.34 km (0.83 miles) between Xuanwei city in Yunnan province and Shuicheng county in Guizhou province.
 
Lower Right: The Aizhai Bridge is a suspension bridge on the G65 Baotou-Maoming Expressway near Jishou, Hunan, China. With a main span of 1,146 metres (3,760 ft) and a deck height of 336 metres (1,102 ft). As of 2013, it is the seventh-highest bridge in the world and the world’s fifteenth-longest suspension bridge.
 
Lower Left: The Shanghai–Kunming Expressway, commonly referred to as the Hukun Expressway is an expressway that connects the cities of Shanghai and Kunming, Yunnan. It is 2,360 km (1,470 mi) in length.
 

Quantum Computer – How They Work

Quantum Computer

If you liked this post;
  • Please consider subscribing to our RSS feed