Description
1. Overview
The Yokogawa YS1700-000/A34 is a high-precision programmable single-loop indicating controller of the YS1700 series. Designed for independent closed-loop process control and on-site local monitoring, it integrates signal acquisition, PID operation, parameter display, control output and intelligent diagnosis functions. It can operate independently without DCS system reliance or work cooperatively with central control systems, widely used in petrochemical, oil & gas, thermal power, water treatment and other process industries.
Featuring 0.1% ultra-high control accuracy, IEC 61508 SIL2 functional safety certification, multi-signal compatibility and dual wide-range power supply adaptation, the controller is equipped with a 3.5-inch TFT color LCD screen. With IP66/NEMA 4X front panel protection and industrial reinforced structure, it ensures long-term stable operation in harsh industrial environments and effectively improves process control accuracy and operational safety.
2. Technical Features
2.1 Ultra-High Control Accuracy & Zero Drift Performance
Adopting Yokogawa self-developed high-precision operation chip and optimized PID algorithm, the overall control accuracy reaches 0.1%. Built-in temperature drift compensation and linear correction mechanisms eliminate parameter deviation caused by ambient changes and equipment aging, ensuring long-term stable control without overshoot, oscillation or steady-state error.
2.2 Full Compatibility with Multi-Type Industrial Signals
Supports full-range industrial input signals including thermocouple, RTD, DC voltage and DC current. Standard 4-20mA/1-5V analog output and relay switch output cover temperature, pressure, flow and liquid level measurement and control requirements. Integrated multi-channel DI/DO points realize flexible logic interlock control without additional signal converters.
2.3 SIL2 Functional Safety Certification
Compliant with IEC 61508 SIL2 functional safety standards, it has complete fault tolerance and safety output logic. When signal abnormality, circuit failure or hardware fault occurs, the controller automatically switches to preset safe state to avoid process runaway and equipment damage, meeting the safety control requirements of high-risk industrial plants.
2.4 Dual Wide-Range Power Supply Adaptation
Supports AC100V and DC24V dual power supply modes with wide voltage tolerance. DC power allows non-polar connection. Built-in surge suppression and voltage stabilization circuits resist grid fluctuation and instantaneous pulse interference, ensuring stable equipment operation under complex power supply conditions.
2.5 High Protection Industrial Reinforced Structure
Front panel adopts IP66/NEMA 4X dustproof and waterproof design. Strict vibration, shock and high-low temperature aging tests enable stable operation in dusty, humid and vibration-prone on-site environments. Industrial three-proof coating effectively prevents circuit aging and corrosion for long-term 24/7 continuous operation.
2.6 Adaptive Intelligent PID Control Algorithm
Integrates multiple PID control modes including auto-tuning, anti-windup and fuzzy PID, adapting to large-inertia temperature loops, fast-response flow/pressure loops and various process characteristics. One-click auto-tuning quickly matches optimal control parameters, greatly shortening on-site commissioning cycle.
2.7 Full-Coverage Self-Diagnosis & Data Logging
Real-time diagnosis covers signal disconnection, over-range, sensor failure, power abnormality and hardware faults. Automatic fault event recording and parameter change logging support rapid fault location, traceability and predictive maintenance, improving system operation reliability.
2.8 Intuitive HMI & Flexible Operation Modes
Equipped with a 3.5-inch high-definition TFT color screen to display process value, set value, output value and alarm information in real time. Supports local key configuration and remote upper computer control, adapting to on-site manual intervention and central centralized monitoring dual operation scenarios.
3. Detailed Specifications
3.1 Basic Hardware Parameters
- Model: YS1700-000/A34
- Manufacturer: Yokogawa Electric Corporation
- Series: YS1700 High-Precision Single-Loop Programmable Controller
- Type: Industrial On-Site Intelligent PID Regulation Instrument
- Core Function: Single-Loop Closed-Loop Control, Local Display, Safety Interlock
- Installation: Standard Panel Mount / Wall Mount
- Display: 3.5-inch TFT Color LCD Screen
- Safety Level: IEC 61508 SIL2
- Front Panel Protection: IP66 / NEMA 4X
3.2 Core Performance Parameters
- Control Accuracy: ±0.1% Full Scale High Precision
- Input Signals: Thermocouple, RTD, DC Voltage, DC Current
- Output Signals: 4-20mA DC, 1-5V DC Analog Output, Relay Switch Output
- Control Algorithm: Adaptive PID, Auto-Tuning PID, Anti-Windup PID, Fuzzy PID
- Diagnosis Function: Full Coverage of Signal, Power and Hardware Faults
- Data Storage: Non-Volatile Memory, Battery-Free Parameter Backup
3.3 Power Supply Parameters
- Power Mode: AC100V ±10% / DC24V ±10% Dual Power Compatibility
- DC Power Feature: Non-Polar Connection
- Protection Mechanism: Over-Voltage, Under-Voltage, Surge and Power-Fault Tolerance
- Stability: Anti-Grid Fluctuation, No Automatic Restart or Parameter Loss
3.4 Environmental Parameters
- Operating Temperature: -10℃ ～ +55℃
- Storage Temperature: -20℃ ～ +70℃
- Operating Humidity: 5%～95%RH (Non-Condensing)
- Environmental Resistance: Dust-Proof, Waterproof, Vibration-Proof, EMC Anti-Interference
- Applicable Scenarios: Chemical Plants, Oil & Gas Stations, Thermal Power & Water Treatment Workshops
4. Operating Principle
The Yokogawa YS1700-000/A34 realizes independent single-loop closed-loop control based on high-precision signal acquisition, adaptive PID operation, safety fault-tolerant output and intelligent self-diagnosis. On-site process signals are preprocessed through filtering, linear correction and temperature drift compensation to eliminate field interference and obtain accurate measured values.
The controller compares the measured value with the set value, calculates the optimal output through PID algorithm, and drives on-site actuators to adjust process parameters dynamically. Multiple adaptive control modes match different process characteristics such as large inertia and pure lag, realizing stable and precise closed-loop regulation.
Full-time self-diagnosis monitors signal status, power supply and hardware operation in real time. The equipment automatically switches to a safe state and records fault logs when abnormalities occur. The non-volatile memory ensures permanent parameter storage, supporting long-term stable and safe operation of industrial process loops.
5. Application Scenarios
1. High-precision closed-loop control for independent process loops in chemical plants.
2. On-site equipment temperature, pressure and flow control for oil & gas storage and transmission stations.
3. Automatic control of thermal power, HVAC and industrial water treatment systems.
4. Safety auxiliary control loops for high-risk industrial production devices with SIL2 safety requirements.
