DCS For Paper Production

1. Software Configuration

1.1. Controller Programming Software: Siemens WinCC v7.0 SP2

1.2. Upper Monitoring Software: Siemens WinCC v7.0 SP2

1.3. Upper Computer OS Software: Windows 10 Professional Edition

1.4. Programming & Memory Management

The control program is developed using WinCC v7.0 SP2. The processor directly stores labels, structures, and arrays, automatically completing memory allocation and system management. This allows users to easily implement an "object-oriented" control programming approach without the need for manual address allocation/management during engineering.

The PCS7 V9.0 SP2 software configuration fully supports the following programming languages:

• Ladder Diagram (LD)
• Function Block Diagram (FBD)
• Statement Table (STL)
• Structured Control Language (SCL)

1.5. HMI Function Screen & Capabilities

The HZDC-DCS series software combines a powerful real-time processing engine with an intuitive user interface. Developed using SIEMENS WinCC v7.0 SP2 configuration software, it provides operators with an intuitive point-and-click graphical interface.

The HZDC-DCS system delivers the following core features:

• Dynamic process flow displaying and monitoring
• Real-time data and system status refreshing
• Advanced loop control for liquid level, concentration, flow, pressure, and temperature
• Manual/Automatic bumpless transfer for regulating valves
• On-off valve sequence control
• Motor control via industrial network integration
• Motor fault alarming, diagnostics, network reset, and field emergency reset
• Safety interlocking control for motors and critical drives
• Group start/stop sequence programming customized to equipment process requirements
• Heavy machinery group control (e.g., impurity separator, disc mill knife feed, 3-stage ventilation)
• PID loop parameters tuning and instrument range settings (Level, Concentration, Flow, Pressure, Temp)
• Historical data logging, trending, and statistical analysis
• Comprehensive alarm logging, fault recording, query, and analysis tools
• Multi-level user authorization and access control security

2. System Hardware Description

This system adopts the high-performance SIEMENS SIMATIC S7-1500 Controller Series PLC:

3. System Master Control Unit

The paper workshop automation scheme utilizes the Siemens CPU S7-1500 series programmable logic controller. Integrated with advanced industrial network topology, automation control technology, and modern computer engineering, the architecture ensures the security of large-scale systems, seamless network expansion, demand-side interfaces, and high-capacity information access.

The system monitors and controls process variables throughout the plant to satisfy strict control loops and scheduling strategies. It manages both conventional single-loop regulation and high-speed digital signal processing, including Sequence of Events (SOE) recording.

The industrial Ethernet communication backbone conforms to ISO/OSI models with open TCP/IP protocols. Utilizing peer-to-peer communication, network nodes can be added or removed online hot-swappable without disrupting existing field operations. Using IEC 61131-3 international standard software, it delivers highly robust continuous and sequential control.

Field Control Station (FCS): A large-scale I/O processing system communicating directly with field devices. It acts as the frontline equipment providing signal acquisition, loop regulation, logic linkage, sequence control, and local operations. The station is composed of the main control unit, analog/digital I/O modules, fieldbus communication modules, redundant power supplies, and industrial enclosures.

Key System Performance Characteristics:

• Minimized I/O response times to maximize overall plant production efficiency.
• Optimized PLC program cycle times for high-speed logic execution.
• Flexible SIMATIC memory card mechanism scaled to variable project configurations.
• High-capacity historical archive and data logging space.