NI CFP-1804 standard network device connection

Description

Configuring and Accessing Tags on a Compact FieldPoint System with LabVIEW 8

National Instruments LabVIEW 8 and Compact FieldPoint create a flexible PAC system that offers easy-to-access I/O through the FieldPoint programming environment. Accessing data from multiple cFP-180x distributed nodes with LabVIEW is as easy as three simple steps:

1. Configure IP address using NI Measurement & Automation Explorer (MAX)

2. Import a FieldPoint configuration file or add a new Compact FieldPoint system

3. Expand I/O in the LabVIEW Project and drag and drop I/O tags to VIs After configuring the IP address for a FieldPoint bank in MAX, either import the configuration file created from MAX, or simply add a new target to a LabVIEW Project as shown in Figure 5.

A cFP-180x connects directly to Ethernet networks, autonegotiating on the network for 10 Mb/s or 100 Mb/s communication rates. It includes an RJ-45 connector for connection to 10BaseT and 100BaseTX networks, using a protocol based on standard TCP/IP to maintain full compatibility with existing networks. FieldPoint builds on standard TCP/IP network protocols and adds a number of key enhancements, including eventdriven communications and publisher-subscriber networking. In a publisher-subscriber architecture, one or more client PCs subscribe to I/O data from Compact FieldPoint banks. The network interface monitors connected I/O modules and publishes I/O data only when the value changes. Analog signals can change value within selectable ranges, called deadbands, without causing the system to report data. This event-driven method, along with data compression, helps you avoid unnecessary Ethernet traffic and maximizes communication efficiency. A cFP-180x also includes a standard DB-9 connector for RS232 serial communication. Through direct connectivity, you can read and write data directly from a program running on your PC or embedded controller. You access I/O through the serial interface using a serial protocol called Optomux, in the same way you would access data through classic FieldPoint network interfaces such as the FP-1000.

Technical parameters of CFP-1804

Network
Network interface…………………………. 10BaseT and 100BaseTX Ethernet
Compatibility ………………………………… IEEE802.3
Communication rates…………………….. 10 or 100 Mb/s, autonegotiated
Maximum cabling distance…………….. 100 m/segment
Maximum power to I/O modules…….. 9 W
Maximum number of banks……………. Determined by network topology

Serial Port
One RS232 (DCE) serial port
Baud rate …………………………………. 300 to 115,200 b/s
Data bits ………………………………….. 8
Stop bits…………………………………… 1
Parity……………………………………….. None
Flow control ……………………………… None

Power Requirement
Power supply range ………………………. 11 to 30 VDC
Recommended power supply………….. 20 W
Power consumption ………………………. 6.1 W + 1.1 (I/O module)