Product Bulletin DVC6200f Digital Valve Controller ...

1 fieldvue DVC6200f Digital ValveController - PST Instrument LevelThe fieldvue DVC6200f Digital Valve Controller is aFOUNDATION Fieldbus communicating instrument thatconverts a Digital control signal into a pneumaticoutput to an actuator. The DVC6200f PST instrumentlevel enables on-line partial stroke Valve testing, whichcan be used in conjunction with a SIL capable solenoidvalve (SOV) to provide additional diagnostic coverageto the SIS Valve assembly. It can easily be retrofitted inplace of existing analog positioners on most fisher andnon fisher pneumatic Linkage Less Non Contact Position Feedback Thehigh performance, linkage less feedback systemeliminates physical contact between the Valve stemand the DVC6200f .

2 There are no wearing parts socycle life is Built to Survive The field proven DVC6200finstrument has fully encapsulated electronics thatresist the effects of vibration, temperature, andcorrosive atmospheres. A weather tight wiringterminal box isolates field wiring connections fromother areas of the Increased Process Uptime The DVC6200finstrument reduces the risk of spurious trip on lossof segment power by using a reverse acting Accurate and Responsive The two stage positionerdesign provides quick response to large stepchanges and precise control for small SYSTEMW9616_fieldbusn Travel Control/Pressure Fallback Valve positionfeedback is critical to the operation of a Digital valvecontroller.

3 The DVC6200f can detect positionfeedback problems and automatically revert topneumatic control mode to keep the Valve Stroke Testingn Partial Stroke Testing (PST) An on-line diagnosticto detect Valve failure modes such as stuck Valve byperforming a small ramp test that moves the Valve ,without disrupting the process. Testing can beautomated or initiated Full Stroke Testing (FST) An off-line diagnostic testto reveal additional Valve failure modes undetectedby the PST by performing a full ramp over the entirevalve travel range. FST is typically performed duringa shut FF906 Certified Partial and full stroke tests can beinitiated from any host which supports theFOUNDATION Fieldbus standard FF-906 Digital Valve ControllerD104160X012 Product : DVC6200f PSTS eptember 2017 DVC6200f Digital Valve ControllerD104160X012 Product : DVC6200f PSTS eptember 2017 2 Figure 1.

4 Condition IndicatorsRED CONDITION INDICATORSIGNIFIES ALERT IS ACTIVERED CONDITIONINDICATOR INDICATESPOSSIBLE CAUSEHIGH SPEED TRIGGERED DATA-STORED INSIDETHE DVC6200f Digital Valve CONTROLLERPD INSIDE PROVIDES POSSIBLE CAUSES ANDRECOMMENDED CORRECTIVE ACTIONSEase of Usen Enhanced Personnel Safety Valve diagnosticinformation can be accessed anywhere along thecommunication loop, reducing personnel exposureto hazardous environments or difficult to Faster Commissioning FOUNDATION Fieldbuscommunications allows you to quickly commissionloops with a variety of tools, either locally at thevalve assembly or Easy Maintenance The DVC6200f Digital valvecontroller is modular in design.

5 Critical workingcomponents can be replaced without removingfield wiring or pneumatic Hassle-free diagnostics Partial stroke and fullstroke tests result in an easy to understandPass/Abnormal criteria including reason for anyAbnormal resultValuen Hardware Savings When installed in an integratedcontrol system, significant hardware andinstallation cost savings can be achieved. Valveaccessories such as limit switches and positiontransmitters can be eliminated because thisinformation is available as function Increased Uptime The self-diagnostic capability ofthe DVC6200f Digital Valve Controller provides valveperformance and health evaluation withoutshutting down the process or pulling the valveassembly from the Improved Maintenance Decisions Digitalcommunication provides easy access to thecondition of the Valve .

6 The DVC6200f alerts complywith the FOUNDATION Fieldbus specifications forField Diagnostics. Sound process and assetmanagement decisions can be made by analysis ofvalve information through fisher Audit Documentation The device provides a timeand date stamp on all tests allowing the means tocomply with requirements of statutory authorities. n Block Instantiation The DVC6200f supports theuse of Function Block Instantiation. When a devicesupports block instantiation, the number of blocksand block types can be customized to matchspecific application needs. Block Instantiation doesnot apply to standard device blocks such asResource and Transducer Digital Valve ControllerD104160X012 Product : DVC6200f PSTS eptember 2017 3 Valve DiagnosticsThe DVC6200f Digital Valve Controller provides a broadand deep portfolio of Valve diagnostic the 475 Field Communicator is used to checkfor Valve alerts and operational status, or ValveLinksoftware is used for comprehensive diagnostic test andanalysis, the tools are easy to use.

7 Because theFOUNDATION Fieldbus system provides continuousdigital communication to field devices, the DVC6200fdelivers prompt notification of current or potentialequipment DVC6200f captures the stroke history when ademand stroke or return stroke occurs. The data isdate and time Stroke Test (PST) enables valves that are in oneposition to be ramped as far as the process will tolerateto detect a stuck Valve . The results are date and timestamped and stored in the device, available for uploadby ValveLink to prevent spurious trips are included with theDVC6200f PST instrument level, including an outgoingpressure threshold that will abort the partial stroketest if exceeded.

8 This prevents a sticking Valve andactuator from overtraveling and potentially causing aspurious , the DVC6200f PST instrument levelprovides access to all the capabilities of PerformanceDiagnostics (PD). Performance Diagnostics (PD)enable condition and performance monitoring of theentire Valve assembly (not just the Digital valvecontroller) while the Valve is actively controlling theprocess. When conducting Performance Diagnosticstests, the Valve does NOT move beyond the normalsetpoint changes driven by the process Controller . TheDVC6200f uses statistical algorithms to determinecondition and performance related issues based on livereadings from the many on board sensors.

9 Results arethen displayed graphically, with severity indicated. Adetailed description of the identified issue as well assuggestions for recommended actions are provided, asshown in figure of identifiable issues are:n Valve Stuckn Solenoid Stuckn Low air supply or pressure droopn Incorrect regulator settingn Dirty air supplyn External air leak (actuator diaphragm or tubing)n Calibration shiftn Piston actuator O ring failuren Excessive or insufficient Valve assembly frictionn Excessive Valve assembly deadbandn Elastomer failure in the DVC6200fn Broken actuator springn Broken Valve /actuator shaftPerformance Diagnostics also provide access tofull stroke dynamic testing of the Valve assemblyincluding; Valve signature, dynamic error band, stepresponse, and stroke check.

10 These tests change theinstrument setpoint at a controlled rate and areperformed while the Valve assembly is isolated fromthe additional information on fieldvue diagnosticsand ValveLink software refer to fisher :ValveLink Software (D102227X012). DVC6200f Digital Valve ControllerD104160X012 Product : DVC6200f PSTS eptember 2017 4 Solenoid Valve Health MonitoringIf a solenoid Valve is installed between the DVC6200fpressure output and the actuator, as shown in figure 2,the Valve assembly can be configured to verify theoperation of the solenoid Valve during onlineoperation. In single-acting actuator applications, the unused output port of the DVC6200f can be pipedsuch that the pressure downstream of the of solenoidvalve is measured.