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This post was last edited by 955559 on 2018-9-16 20:49. dvc6000
Product sample 62.1: DVC6000, September 2003. The DVC6000 digital valve controller FIELDVUE. The DVC6000 series of digital valve controllers FIELDVUE. The DVC6000 series of digital valve controllers (Figures 1 and 2) are microprocessor-based instruments that can communicate and convert electrical signals into pneumatic signals. In addition to its traditional function of converting electrical signals into pneumatic signals, the DVC6000 series of digital valve controllers allows easy access to information that is crucial for process operation, via the HART communication protocol. This function can be achieved using a Model 375 field communicator near the valve or at the field junction box, or via a personal computer or system console in the control room. The HART communication protocol can be used to integrate information into control systems or to collect data on a per-loop basis. The DVC6000 series of digital valve controllers can be used with single-acting or double-acting W7957/IL actuators. Figure 1 shows the DVC6010 digital valve controller installed on a straight-stroke valve actuator. The digital valve controller receives feedback on the valve’s position, as well as the supply air pressure and the pneumatic pressure of the actuator. This enables the instrument to diagnose not only itself but also the valves and actuators it is installed with. This provides you with cost-effective and efficient maintenance information, enabling you to carry out the necessary repairs on instruments and valves when needed. Wiring is economical because the DVC6000 series digital valve controllers use a 2-wire 4-20mA circuit for power supply. This creates the conditions for replacing existing analog meters at a low cost. The 2-wire design of the DVC6000 series digital valve controllers eliminates the need for costly separate wiring for power and signal lines. W7960-1/IL Figure 2. DVC6010 Digital Valve Controller mounted on linear actuator valves D102758X012 www.Fisher.com Product Catalog 62.1: DVC6000 DVC6000 Digital Valve Controller September 2003 Technical Specifications Available Configurations Instruments mounted on the valve DVC6010: For use with linear control valves DVC6020: For use with rotary and long-stroke linear control valves DVC6030: For use with 90-degree rotary control valves Instruments installed remotely (1) DVC6005: Basic unit for 2-inch piping or wall-mounted installation DVC6015: Feedback unit for linear valves DVC6025: Feedback unit for rotary and long-stroke linear valves DVC6035: Feedback unit for 90-degree rotary valves The DVC6000 series of digital valve controllers can be installed on Fisher and other manufacturers’ rotary and linear actuators Input signals (2) Point-to-point method: Analog input signal: 4-20 mA DC, standard; scaling capability is available. The minimum voltage required at the instrument terminals for analog control must be 10.5 volts DC, while for HART communication it is 11 volts DC (see the instrument manual for details). Minimum control current: 4.0 mA Minimum current without causing the microprocessor to restart: 3.5 mA Maximum voltage: 30 volts DC Overcurrent protection: The input circuit limits current to prevent internal damage Reverse polarity protection: Reverse circuit current will not cause damage Multi-point method: Instrument power supply: 11 to 30 volts DC at approximately 8 mA Reverse polarity protection: Reverse circuit current will not cause damage Output signals (2) Pneumatic signal required by the actuator, up to 95% of the supply air pressure Minimum range: 0.4 bar (6 psig) Maximum range: 9.5 bar (140 psig) Operation modes: ■ Double-acting, ■ Single-acting positive, ■ Single-acting negative Supply air pressure Recommended minimum pressure: 0.3 bar (5 psig) higher than the maximum pressure required by the actuator. Maximum pressure: .. 10.0 bar (145 psig), which is the lower of the actuator’s maximum rated pressure value. Steady-state air consumption (1)(2)(4)(7):
Standard amplifier: At an air supply pressure of 1.4 bar (20 psig): less than 0.4 standard m3/hr (14 scfh); at an air supply pressure of 5.5 bar (80 psig): less than 1.4 standard m3/hr (49 scfh).
Low-air-consumption amplifier: At an air supply pressure of 1.4 bar (20 psig): average value of 0.056 m3/hr (2.1 scfh); at an air supply pressure of 5.5 bar (80 psig): average value of 0.184 standard m3/hr (6.9 scfh).
Maximum output capacity (1)(4):
At an air supply pressure of 1.4 bar (20 psig): 10.6 standard m3/hr (375 scfh); at an air supply pressure of 5.5 bar (80 psig): 31.1 standard m3/hr (1100 scfh).
Independent linearity (2)(5): ±0.50% of the output range.
Electromagnetic interference (EMI) (6): Tested in accordance with IEC 61326-1 (version 1.1); meets the radiation intensity requirements for Class A (industrial environment) and Class B (home environment) devices, as well as the interference resistance requirements for factory areas (Table A.1). Interference resistance performance is shown in Table 1. Electrical rating (6) Hazardous areas: Explosion-proof, intrinsically safe, Zone 2, and fire-resistant designs that comply with CSA, FM, CENELEC, and SAA standards are available. Refer to the Hazardous Area Classification Samples 9.2:001 series and 9.2:002. According to standard ANSI/ISA-82.02.01-1999 (IEC610101-1 Mod), pollution class 2, overvoltage class III. Enclosure electrical rating: Complies with NEMA 4X, CSA Type 4X, IEC 60529, IP66. (To be continued) Product Sample 62.1:DVC6000, September 2003. Technical specifications for the DVC6000 digital valve controller (continued). IEC61010 requirements (applicable only to instruments installed on valves). Power supply: The circuit current must be supplied by a separate voltage-low (SELV) power source. Environmental conditions: Installation type I connection. Supply pressure: 1/4 inch NPT female thread, along with an integrated plate for installing the 67CFR regulator. Output pressure: 1/4 inch NPT female thread. Piping: 3/8 inch metal pipe is recommended. Drain port (remote drain): 1/4 inch NPT female thread. Electrical connections: 1/2 inch NPT threaded conduit outlet; an M20 adapter is available as an option. Operating temperature range: -40 to 80°C (-40 to 176°F) for most certified instruments installed on valves and the DVC6005 base unit; -40 to 125°C (-40 to 257°F) for remotely installed feedback units; -52 to 80°C (-62 to 176°F) for valve-mounted instruments using special temperature options (fluorosilicone rubber). For instruments that have obtained certification for operation in hazardous areas, the restrictions regarding ambient temperature can be found in the hazardous area classification guidelines. Structural materials: Shell, module base, and wiring box connections: ASTM B85 A03600 low-copper aluminum alloy (standard configuration). Cover: Valox CF8M (316 stainless steel) (available only as an option for instruments installed on valves). Elastic elements: Standard: Nitrile rubber; Options: Fluorosilicone rubber. Stem travel: DVC6010, DVC6015: Maximum 0 to 102 mm (4 inches), minimum 9.5 mm (3/8 inch). DVC6020, DVC6025: Maximum 0 to 606 mm (23-7/8 inches). Rotation angle (DVC6020, ……, DVC6025, ……, DVC6030, ……, DVC6035): Minimum 0 to 50 degrees, maximum 0 to 90 degrees. Installation: Designed for direct installation on actuators or for remote piping/wall mounting. To ensure protection from climate effects, the instrument must be installed vertically to allow water to drain away. Weight of instruments installed on valves: Aluminum: 3.5 kg (7.7 lbs); Stainless steel: 7.7 kg (17 lbs). For instruments installed remotely: DVC6005 base unit: 4.1 kg (9 lbs); DVC6015 feedback unit: 1.3 kg (2.9 lbs); DVC6025 feedback unit: 1.4 kg (3.1 lbs); DVC6035 feedback unit: 0.9 kg (2.0 lbs). Optional accessories: ■ Input/output pressure gauges; ■ Valve actuators; ■ Integrated filter-reducing valves; ■ Stainless steel enclosures, bases, and junction boxes (only for instruments installed on valves); ■ Low-air-consumption amplifiers; ■ Special temperature options. 1. A 3-core shielded cable with a minimum wire size of 22 AWG is recommended for connecting the base unit and the feedback unit. The pneumatic connections between the output of the base unit and the actuator have been tested, showing no loss in performance over distances of up to 15 meters. 2. These terms are defined in ISA Standard S51.1. 3. Standard m3/hr – standard cubic meters per hour at 0°C and an absolute pressure of 1.01325 bar. 4. These values were obtained at a pressure of 1.4 bar using a direct single-acting amplifier, while these values were obtained at a pressure of 5.5 bar using a double-acting amplifier. 5. Not applicable to the DVC6020 digital valve controller when it is used for long-stroke or remote installations, or when the air pipe length of the DVC6005 digital valve controller is long. 6. The remote installation unit is pending approval. 7. The low-gas-consumption amplifier is a standard feature of the DVC6000 ESD, for on/off applications. Product samples.. 62.1:DVC6000 Digital valve controller DVC6000, September 2003 Table 1. Interference resistance Performance standards for port phenomena Standard Performance standard (1) Point-to-point mode Multi-point mode Protection sealing Static discharge.. IEC 61000-4-2 A(2) A Electromagnetic radiation area.. IEC 61000-4-3 A A Rated power frequency Magnetic range.. IEC 61000-4-8 A AI/O signals and control Active excitation.. IEC 61000-4-4 A(2) A Surges.. IEC 61000-4-5 A(2) A RF conduction.. IEC 61000-4-6 A A 1. A=No degradation during testing. B = Temporary degradation during testing is possible but can recover on its own. 2. It does not include an auxiliary switch function; it meets the requirements of performance standard B. It helps with environmental protection – by connecting harmful substance leakage detectors or limit switches to the auxiliary terminals on the DVC6000 series digital valve controllers, it is possible to avoid the need for additional on-site wiring. With this method, if the limit is exceeded, the instrument will issue an alarm. Improved control – two-way digital communication can provide information on the current status of the valve. You can rely on this real-time information to make appropriate process management decisions. By analyzing the valve status through the AMS ValveLink software, it is possible to identify control areas that require improvement in order to maintain a high level of system performance. Increasing the safety factor helps to maintain stable and safe operation of the process while remotely monitoring the performance of instruments and valves. Access to the system can be gained through on-site junction boxes or control panels using HART communicators, or via a laptop or system workstation in a secure control room. The chances of being exposed to hazardous environments can be minimized, and access to \"difficult-to-reach\" valves can also be avoided. Hardware savings–When the DVC6000 series of digital valve controllers are used in integrated systems, they enable significant savings in terms of hardware and installation costs, as the FIELDVUE digital valve controllers can replace other devices in the process loop, such as position transmitters and limit switches. Overcoming harsh environments–built to withstand real-world conditions. The DVC6000 series of digital valve controllers features fully enclosed printed circuit boards that can resist vibration, temperature changes, and corrosive environments. A separate, weatherproof field junction box separates the connections of the field wiring from other areas of the instrument. Increase operating time – Since the DVC6000 series digital valve controllers have self-diagnosis capabilities, it is possible to diagnose the valves during their operation (checking the integrity of I/P and amplifiers, travel deviation, online frictional dead zones, and trend analysis). You can compare the current characteristic curves of the valves/actuators (such as spring setting ranges, seat closing force, friction, etc.) with previously stored data to identify any changes in performance. Accelerate debugging -- The two-way communication capability allows you to quickly debug the circuit by remotely checking each instrument, verifying its calibration, viewing stored maintenance records, and accessing other information. Easy to maintain -- The DVC6000 series digital valve controllers feature a modular design. The individual main module can be removed from the instrument housing without having to disconnect the on-site wiring, pneumatic connections, or valve stem links. This module contains key submodules that make the disassembly of components simple and quick. Diagnosis.. The DVC6000 series digital valve controllers feature user-configurable alarms and alerts. When integrated with systems based on HART communication, these identification bits provide real-time reports on current and potential issues with valves and instruments. Tests can be conducted using the .. AMS ValveLink software to check for issues with the control valve components. Diagnostic functions include performance diagnosis (.. PD) and advanced diagnosis (AD). Performance diagnosis: Red/yellow/green status indicators (see Fig. .. 3). Overall diagnosis of I/P and amplifiers. Stroke deviation diagnosis. 1-key diagnosis. Online friction and dead zone analysis (see Fig. .. 4). Friction and dead zone trends. All diagnoses can be carried out with the valve installed on the pipeline, but only performance diagnosis can be performed while the valve is in operation and in service. Product Sample 62.1: DVC6000, September 2003. DVC6000 Digital Valve Controller. Error (Red), Warning (Yellow). No conditions detected. Figure 4. Analysis of valve friction and dead band. Advanced diagnostics: Advanced diagnostics include the following dynamic scan tests: Valve characteristic curve (Figure 6), Dynamic error band, Instrument drive signal (Green). Figure 3. Red/Yellow/Green status indicators, displayed as... AMS ValveLink software. These diagnostic scans examine the positioner setpoints and control rates, thereby describing the valve’s dynamic performance in a graphical manner. The valve characteristic curve describes the friction of the valve/actuator, the operating range of the spring, the spring stiffness, and the seat load capacity. The dynamic error band curve incorporates information such as dead zone, hysteresis, and positioning. Dead zone and hysteresis are static measurements; since the valve is in motion, dynamic errors or positioning errors are introduced to describe them. Dynamic testing can provide a good indication of how a valve performs under operational conditions; it involves dynamic rather than static data. The step response test is used to examine the response of the valve assembly to an input signal, providing a graph of relative time. The results can be used to evaluate the dynamic performance of the valve. The performance step test (25 preset points) provides a series of standard step-response tests to evaluate the valve, using small, medium, and large variations. Advanced diagnostics are implemented using the AMS ValveLink software. The valve must be out of service when performing advanced diagnostics. Product sample 62.1: DVC6000 Digital valve controller, September 2003. Distributed Control System (DCS), MODBUS, AMS ValveLink software, Field Terminal Assembly (FTA), RS232-to-RS485, 4-20mA converter, Control system I/O, 4-20mA HART multiplexer + HART control system I/O, W8082/IL. Figure 5: Integrating information from the digital valve controller into non-HART compatible control systems through the Modbus interface of AMS ValveLink software. AMS ValveLink software together with the HART multiplexer enables integration with Modbus – HART communication allows you to obtain additional benefits from the DVC6000 series of digital valve controllers beyond their inherent performance improvements. When the controller integrates a multiplexer network and uses the AMS ValveLink software, the information on the equipment and valves becomes real-time data. Alarms and warnings from multiple instruments can be monitored from the safe area in the control room. Furthermore, tasks such as configuration, verification, and diagnostic testing do not require going to the site in person to be carried out. The AMS ValveLink software can communicate with Distributed Control Systems (DCS) via Modbus, providing critical information such as valve travel alerts and alarms (Figure 5). Figure 6. The valve performance curve shows that the integrated control system – a control system with HART communication capabilities – can directly acquire information from the DVC6000 series of digital valve controllers. From the secure area of the control room, it is possible to gain complete access to information such as valve status and non-HART system data – including details related to digital valve control, alerts, and warnings via the DVC6000 series. The field devices are operated using traditional 4-20mA control signals, allowing for direct visualization of their status. To replace older analog meters. Microprocessor-based electronic circuits not only provide repeatable and reliable configuration and verification but also improve performance. Product sample 62.1: DVC6000, September 2003. DVC6000 digital valve controller; average current variation during communication = 0 A. 6174/IL, Figure 7: HART frequency shift keying technology. W7125/IL, Figure 8: Configuration and calibration can be carried out using the Model 375 field communicator, either near the valve or at any point on the 4-20mA loop. Overview of the HART communication protocol: The HART (High-Speed Digital Communication for Addressable Remote Sensors) protocol provides field devices with the capability to communicate data from instruments and processes in digital form over long distances. This digital communication takes place on the same 2-wire circuit that is used to transmit the 4-20mA process control signal, without disrupting the process signal (Figure 7). In this way, the analog process signal enables control with a relatively fast response. At the same time,.. HART digital communication enables you to access verification, configuration, diagnosis, maintenance, and other process information. This protocol enables the overall integration of the system through a master control device. The HART protocol provides multi-point connection capability. In the multi-point mode, you can connect several devices to a pair of communication lines. This type of connection is most suitable for remote control applications such as pipelines, oil and gas monitoring stations, and tank farms. .. The Model 375 field communicator allows for setup and calibration to be carried out anywhere near the valve or on a 2-wire circuit, using the Model 375 field communicator (Figure.. 8). Powerful software tools such as the Sefup Wizard and Auto Travel Calibration automate the task of debugging the DVC6000 series digital valve controllers. These automation tools not only save time but also deliver accurate and reproducible results. .. AMS ValveLink software: The AMS ValveLink software is a Windows-based package that allows users to access the information provided by the DVC6000 series of digital valve controllers at will. You can use the AMS ValveLink software to monitor the performance characteristics of valves and obtain critical information without having to remove the valves from the pipeline. The integrity of the I/P and amplifier, travel deviation, as well as online friction force dead zones and trend analysis can be used for diagnosis during valve operation and operation; valve characteristics… Is this attachment incomplete?
Standard amplifier: At an air supply pressure of 1.4 bar (20 psig): less than 0.4 standard m3/hr (14 scfh); at an air supply pressure of 5.5 bar (80 psig): less than 1.4 standard m3/hr (49 scfh).
Low-air-consumption amplifier: At an air supply pressure of 1.4 bar (20 psig): average value of 0.056 m3/hr (2.1 scfh); at an air supply pressure of 5.5 bar (80 psig): average value of 0.184 standard m3/hr (6.9 scfh).
Maximum output capacity (1)(4):
At an air supply pressure of 1.4 bar (20 psig): 10.6 standard m3/hr (375 scfh); at an air supply pressure of 5.5 bar (80 psig): 31.1 standard m3/hr (1100 scfh).
Independent linearity (2)(5): ±0.50% of the output range.
Electromagnetic interference (EMI) (6): Tested in accordance with IEC 61326-1 (version 1.1); meets the radiation intensity requirements for Class A (industrial environment) and Class B (home environment) devices, as well as the interference resistance requirements for factory areas (Table A.1). Interference resistance performance is shown in Table 1. Electrical rating (6) Hazardous areas: Explosion-proof, intrinsically safe, Zone 2, and fire-resistant designs that comply with CSA, FM, CENELEC, and SAA standards are available. Refer to the Hazardous Area Classification Samples 9.2:001 series and 9.2:002. According to standard ANSI/ISA-82.02.01-1999 (IEC610101-1 Mod), pollution class 2, overvoltage class III. Enclosure electrical rating: Complies with NEMA 4X, CSA Type 4X, IEC 60529, IP66. (To be continued) Product Sample 62.1:DVC6000, September 2003. Technical specifications for the DVC6000 digital valve controller (continued). IEC61010 requirements (applicable only to instruments installed on valves). Power supply: The circuit current must be supplied by a separate voltage-low (SELV) power source. Environmental conditions: Installation type I connection. Supply pressure: 1/4 inch NPT female thread, along with an integrated plate for installing the 67CFR regulator. Output pressure: 1/4 inch NPT female thread. Piping: 3/8 inch metal pipe is recommended. Drain port (remote drain): 1/4 inch NPT female thread. Electrical connections: 1/2 inch NPT threaded conduit outlet; an M20 adapter is available as an option. Operating temperature range: -40 to 80°C (-40 to 176°F) for most certified instruments installed on valves and the DVC6005 base unit; -40 to 125°C (-40 to 257°F) for remotely installed feedback units; -52 to 80°C (-62 to 176°F) for valve-mounted instruments using special temperature options (fluorosilicone rubber). For instruments that have obtained certification for operation in hazardous areas, the restrictions regarding ambient temperature can be found in the hazardous area classification guidelines. Structural materials: Shell, module base, and wiring box connections: ASTM B85 A03600 low-copper aluminum alloy (standard configuration). Cover: Valox CF8M (316 stainless steel) (available only as an option for instruments installed on valves). Elastic elements: Standard: Nitrile rubber; Options: Fluorosilicone rubber. Stem travel: DVC6010, DVC6015: Maximum 0 to 102 mm (4 inches), minimum 9.5 mm (3/8 inch). DVC6020, DVC6025: Maximum 0 to 606 mm (23-7/8 inches). Rotation angle (DVC6020, ……, DVC6025, ……, DVC6030, ……, DVC6035): Minimum 0 to 50 degrees, maximum 0 to 90 degrees. Installation: Designed for direct installation on actuators or for remote piping/wall mounting. To ensure protection from climate effects, the instrument must be installed vertically to allow water to drain away. Weight of instruments installed on valves: Aluminum: 3.5 kg (7.7 lbs); Stainless steel: 7.7 kg (17 lbs). For instruments installed remotely: DVC6005 base unit: 4.1 kg (9 lbs); DVC6015 feedback unit: 1.3 kg (2.9 lbs); DVC6025 feedback unit: 1.4 kg (3.1 lbs); DVC6035 feedback unit: 0.9 kg (2.0 lbs). Optional accessories: ■ Input/output pressure gauges; ■ Valve actuators; ■ Integrated filter-reducing valves; ■ Stainless steel enclosures, bases, and junction boxes (only for instruments installed on valves); ■ Low-air-consumption amplifiers; ■ Special temperature options. 1. A 3-core shielded cable with a minimum wire size of 22 AWG is recommended for connecting the base unit and the feedback unit. The pneumatic connections between the output of the base unit and the actuator have been tested, showing no loss in performance over distances of up to 15 meters. 2. These terms are defined in ISA Standard S51.1. 3. Standard m3/hr – standard cubic meters per hour at 0°C and an absolute pressure of 1.01325 bar. 4. These values were obtained at a pressure of 1.4 bar using a direct single-acting amplifier, while these values were obtained at a pressure of 5.5 bar using a double-acting amplifier. 5. Not applicable to the DVC6020 digital valve controller when it is used for long-stroke or remote installations, or when the air pipe length of the DVC6005 digital valve controller is long. 6. The remote installation unit is pending approval. 7. The low-gas-consumption amplifier is a standard feature of the DVC6000 ESD, for on/off applications. Product samples.. 62.1:DVC6000 Digital valve controller DVC6000, September 2003 Table 1. Interference resistance Performance standards for port phenomena Standard Performance standard (1) Point-to-point mode Multi-point mode Protection sealing Static discharge.. IEC 61000-4-2 A(2) A Electromagnetic radiation area.. IEC 61000-4-3 A A Rated power frequency Magnetic range.. IEC 61000-4-8 A AI/O signals and control Active excitation.. IEC 61000-4-4 A(2) A Surges.. IEC 61000-4-5 A(2) A RF conduction.. IEC 61000-4-6 A A 1. A=No degradation during testing. B = Temporary degradation during testing is possible but can recover on its own. 2. It does not include an auxiliary switch function; it meets the requirements of performance standard B. It helps with environmental protection – by connecting harmful substance leakage detectors or limit switches to the auxiliary terminals on the DVC6000 series digital valve controllers, it is possible to avoid the need for additional on-site wiring. With this method, if the limit is exceeded, the instrument will issue an alarm. Improved control – two-way digital communication can provide information on the current status of the valve. You can rely on this real-time information to make appropriate process management decisions. By analyzing the valve status through the AMS ValveLink software, it is possible to identify control areas that require improvement in order to maintain a high level of system performance. Increasing the safety factor helps to maintain stable and safe operation of the process while remotely monitoring the performance of instruments and valves. Access to the system can be gained through on-site junction boxes or control panels using HART communicators, or via a laptop or system workstation in a secure control room. The chances of being exposed to hazardous environments can be minimized, and access to \"difficult-to-reach\" valves can also be avoided. Hardware savings–When the DVC6000 series of digital valve controllers are used in integrated systems, they enable significant savings in terms of hardware and installation costs, as the FIELDVUE digital valve controllers can replace other devices in the process loop, such as position transmitters and limit switches. Overcoming harsh environments–built to withstand real-world conditions. The DVC6000 series of digital valve controllers features fully enclosed printed circuit boards that can resist vibration, temperature changes, and corrosive environments. A separate, weatherproof field junction box separates the connections of the field wiring from other areas of the instrument. Increase operating time – Since the DVC6000 series digital valve controllers have self-diagnosis capabilities, it is possible to diagnose the valves during their operation (checking the integrity of I/P and amplifiers, travel deviation, online frictional dead zones, and trend analysis). You can compare the current characteristic curves of the valves/actuators (such as spring setting ranges, seat closing force, friction, etc.) with previously stored data to identify any changes in performance. Accelerate debugging -- The two-way communication capability allows you to quickly debug the circuit by remotely checking each instrument, verifying its calibration, viewing stored maintenance records, and accessing other information. Easy to maintain -- The DVC6000 series digital valve controllers feature a modular design. The individual main module can be removed from the instrument housing without having to disconnect the on-site wiring, pneumatic connections, or valve stem links. This module contains key submodules that make the disassembly of components simple and quick. Diagnosis.. The DVC6000 series digital valve controllers feature user-configurable alarms and alerts. When integrated with systems based on HART communication, these identification bits provide real-time reports on current and potential issues with valves and instruments. Tests can be conducted using the .. AMS ValveLink software to check for issues with the control valve components. Diagnostic functions include performance diagnosis (.. PD) and advanced diagnosis (AD). Performance diagnosis: Red/yellow/green status indicators (see Fig. .. 3). Overall diagnosis of I/P and amplifiers. Stroke deviation diagnosis. 1-key diagnosis. Online friction and dead zone analysis (see Fig. .. 4). Friction and dead zone trends. All diagnoses can be carried out with the valve installed on the pipeline, but only performance diagnosis can be performed while the valve is in operation and in service. Product Sample 62.1: DVC6000, September 2003. DVC6000 Digital Valve Controller. Error (Red), Warning (Yellow). No conditions detected. Figure 4. Analysis of valve friction and dead band. Advanced diagnostics: Advanced diagnostics include the following dynamic scan tests: Valve characteristic curve (Figure 6), Dynamic error band, Instrument drive signal (Green). Figure 3. Red/Yellow/Green status indicators, displayed as... AMS ValveLink software. These diagnostic scans examine the positioner setpoints and control rates, thereby describing the valve’s dynamic performance in a graphical manner. The valve characteristic curve describes the friction of the valve/actuator, the operating range of the spring, the spring stiffness, and the seat load capacity. The dynamic error band curve incorporates information such as dead zone, hysteresis, and positioning. Dead zone and hysteresis are static measurements; since the valve is in motion, dynamic errors or positioning errors are introduced to describe them. Dynamic testing can provide a good indication of how a valve performs under operational conditions; it involves dynamic rather than static data. The step response test is used to examine the response of the valve assembly to an input signal, providing a graph of relative time. The results can be used to evaluate the dynamic performance of the valve. The performance step test (25 preset points) provides a series of standard step-response tests to evaluate the valve, using small, medium, and large variations. Advanced diagnostics are implemented using the AMS ValveLink software. The valve must be out of service when performing advanced diagnostics. Product sample 62.1: DVC6000 Digital valve controller, September 2003. Distributed Control System (DCS), MODBUS, AMS ValveLink software, Field Terminal Assembly (FTA), RS232-to-RS485, 4-20mA converter, Control system I/O, 4-20mA HART multiplexer + HART control system I/O, W8082/IL. Figure 5: Integrating information from the digital valve controller into non-HART compatible control systems through the Modbus interface of AMS ValveLink software. AMS ValveLink software together with the HART multiplexer enables integration with Modbus – HART communication allows you to obtain additional benefits from the DVC6000 series of digital valve controllers beyond their inherent performance improvements. When the controller integrates a multiplexer network and uses the AMS ValveLink software, the information on the equipment and valves becomes real-time data. Alarms and warnings from multiple instruments can be monitored from the safe area in the control room. Furthermore, tasks such as configuration, verification, and diagnostic testing do not require going to the site in person to be carried out. The AMS ValveLink software can communicate with Distributed Control Systems (DCS) via Modbus, providing critical information such as valve travel alerts and alarms (Figure 5). Figure 6. The valve performance curve shows that the integrated control system – a control system with HART communication capabilities – can directly acquire information from the DVC6000 series of digital valve controllers. From the secure area of the control room, it is possible to gain complete access to information such as valve status and non-HART system data – including details related to digital valve control, alerts, and warnings via the DVC6000 series. The field devices are operated using traditional 4-20mA control signals, allowing for direct visualization of their status. To replace older analog meters. Microprocessor-based electronic circuits not only provide repeatable and reliable configuration and verification but also improve performance. Product sample 62.1: DVC6000, September 2003. DVC6000 digital valve controller; average current variation during communication = 0 A. 6174/IL, Figure 7: HART frequency shift keying technology. W7125/IL, Figure 8: Configuration and calibration can be carried out using the Model 375 field communicator, either near the valve or at any point on the 4-20mA loop. Overview of the HART communication protocol: The HART (High-Speed Digital Communication for Addressable Remote Sensors) protocol provides field devices with the capability to communicate data from instruments and processes in digital form over long distances. This digital communication takes place on the same 2-wire circuit that is used to transmit the 4-20mA process control signal, without disrupting the process signal (Figure 7). In this way, the analog process signal enables control with a relatively fast response. At the same time,.. HART digital communication enables you to access verification, configuration, diagnosis, maintenance, and other process information. This protocol enables the overall integration of the system through a master control device. The HART protocol provides multi-point connection capability. In the multi-point mode, you can connect several devices to a pair of communication lines. This type of connection is most suitable for remote control applications such as pipelines, oil and gas monitoring stations, and tank farms. .. The Model 375 field communicator allows for setup and calibration to be carried out anywhere near the valve or on a 2-wire circuit, using the Model 375 field communicator (Figure.. 8). Powerful software tools such as the Sefup Wizard and Auto Travel Calibration automate the task of debugging the DVC6000 series digital valve controllers. These automation tools not only save time but also deliver accurate and reproducible results. .. AMS ValveLink software: The AMS ValveLink software is a Windows-based package that allows users to access the information provided by the DVC6000 series of digital valve controllers at will. You can use the AMS ValveLink software to monitor the performance characteristics of valves and obtain critical information without having to remove the valves from the pipeline. The integrity of the I/P and amplifier, travel deviation, as well as online friction force dead zones and trend analysis can be used for diagnosis during valve operation and operation; valve characteristics… Is this attachment incomplete?