Presentation on theme: "Integrated Device Networks for ControlLogix ® Systems “Practical Applications for HART I/O”"— Presentation transcript:
Integrated Device Networks for ControlLogix ® Systems “Practical Applications for HART I/O”
Founded in 1983 Developer of I/O, HMI and Embedded Products Brand Label and Spectrum Label Products Rockwell Automation Global Encompass Partner Located near Seattle, Washington, USA Founded in 1983 Developer of I/O, HMI and Embedded Products Brand Label and Spectrum Label Products Rockwell Automation Global Encompass Partner Located near Seattle, Washington, USA Spectrum Controls, Inc.
Definition of Process Networks Enterprise Networks - protocols that focus on IT applications (LAN, WAN, Ethernet…) Control Networks - protocols typically used to connect controllers and I/O systems (ControlNet, Ethernet/IP, FF-HSE, Modbus, Profibus-DP) Device Networks - protocols originally focused on process instrumentation (Foundation Fieldbus-H1, HART, Profibus-PA) Sensor Networks - protocols initially designed to support discrete I/O (AS-I, CAN, DeviceNet, Interbus, LON) Protocols The network type does not necessarily define the protocol. Separation of protocols and network type is often unclear, many cross into several classifications.
Engineering Workstation RSLogix / Logix RSView / RSMACC Asset Management AMS / DMS/ FieldCare Visualization RSView or PanelView ENet Change Management & Maintenance Integrated Architecture Hand Calibrator ENet or CNet Enterprise Client Applications ControlLogix Analog+HART I/O HART Field Devices Analog and HART Data
UNIQUE COMMUNICATION SOLUTION The HART Protocol supports two way digital communications and is designed to complement traditional 4-20mA analog signal. Analog Signal HART - Highway Addressable Remote Transducer HART Primer Pre-defined Commands Common Practice General Purpose Device Specific Large Installation Base Worldwide Support
Existing acquisition methods Handheld Communicator Limited to point-to-point connection! Requires you to be in the field! Clip-on Serial Modem
Evolution of HART Technology 8 Channels of Analog Input or Output Each channel selectable… Voltage Current Current + HART Versatile Communication Options Compatible with PLX and CLX HART compliant (Point to Point) Standard wiring / terminal blocks Connectivity Software 1756sc-IF8H - Analog Input with HART 1756sc-OF8H - Analog Output with HART
I/O Block Diagram Proven analog technology 16 to 21 bit resolution HART modem services are independent HART and Analog data on the backplane ControlNet Compliant Communication
Hardware Interface The HART I/O modules reside within a Logix PLC chassis. The I/Os are fully ControlNet compliant. This means data is accessed via - scan-based communication - unconnected messaging ( processor independent ) Scan-Based Device Information PV,SV,TV,FV Automatic Connection Read Access Unconnected Message Device Information PV,SV,TV,FV Extended HART Data Vendor Specific Commands Read/Write Access
I/O Communications: Scan-based The modules are configured using RSLogix 5000 Scan based data is accessed via your ladder logic using module tags. You have access to: Analog value/control Device Information HART PV, SV, TV, FV HART “Packet” Data Four user defined slot variables You have access to key data… which updates automatically
I/O Communications: Scan-based Scan based data is accessed via your ladder logic using module tags. Note that the HART PV, SV, TV, FV are available without the typical command / response dialog.
I/O Coms: Unconnected Messaging The module will accept and queue unconnected message requests. These messages may be generated by 1.Message block in your ladder logic 2.Your Application Layer 3.Another ControlNet Node You have access to: ALL DATA Analog value/control HART PV, SV, TV, FV Common Practice Commands Device Specific Commands CIP Client Control and Information Protocol
Enterprise Client Applications ControlLogix w/ HART I/O HART Field Devices Client Software There are applications for every aspect of system management and operation.
How CONNECTS works… Enterprise Client Applications RSLinx RS-232 Interface Asset Management Software Interface Communication Controller Configuration File User Interface Activity Log HART I/O Interface Network Interface (Ethernet, ControlNet)
Enterprise Client Applications ControlLogix w/ HART I/O HART Field Devices Highly Standardized Large Installation Base Less costly
Instrument HART Data PV: Mass Flow Rate SV: Totalizer 1 TV: Density FV: Temperature Volume Flow Std. Volume Flow Target Flow Carrier Flow Calculated Density Totalizer 2 Endress+Hauser Mass Flow Meter Metso Control Valve PV: Percent Travel SV: Travel Setpoint TV: Temperature FV: Supply Pressure Status Bytes RAM Fail Pressure Sensor Fail Temperature Sensor Fail Position Sensor Fail Read Set Flow Units Reset Totalizers Set Zero & Full Scale Range Change K Factor Change Pipe Diameter Set Flow Direction Set “Low Flow Cutoff” Make Density Adjustments Write Perform Diagnostic Tests Set Zero & Span Adjust For Mechanical Wear Adjust Valve Sensitivity Write
Commissioning Quickly verify and document device configuration and calibration, assure the integrity of wiring, and confirm the operational capability of every control loop – all from one central location. Verify and tune valve performance by performing loop checks, via the network, and read back position. Generate and archive system configuration data more quickly.
Operation with HART Normal Operation 4-20mA PV: Percent Travel SV: Travel Set Point TV: Temperature FV: Supply Pressure Set Zero & Span Adjust For Mechanical Wear Adjust Valve Sensitivity Diagnostics / Maintenance 4-20mA Status Byte RAM Fail Pressure Sensor Fail Temp Sensor Fail Position Sensor Fail Perform Diagnostic Tests Set Zero & Span Adjust For Mechanical Wear Adjust Valve Sensitivity LGXCPULGXCPU HARTHART ENetENet
Operation without HART Temperature Pressure Flow Analog data from three field devices HART data is not being used PLC performs all calculations LGXCPULGXCPU ENetENet Dedicated field devices Dedicated I/O modules More loops to wire
Operation with HART Read Data PV: Mass Flow Rate SV: Totalizer 1 TV: Density FV: Temperature Volume Flow Std. Volume Flow Target Flow Carrier Flow Calculated Density Totalizer 2 Write Data Set Flow Units Reset Totalizers Set Zero & Full Scale Change K Factor Change Pipe Diameter Set Flow Direction Set Low Flow Cutoff Make Density Adjustments Simplified Installation/Wiring Better Quality Data More Diagnostic Information
Maintenance with HART Device Management Workstation vs. Field Scheduling Reduce downtime System Backup Fast Recovery Historical Reference Identify Trends Determine Reliability