Delta Sequential Function Charts (SFC) for Bottle Filling: Complete Programming Guide

Implementing Sequential Function Charts (SFC) for Bottle Filling using Delta WPLSoft / ISPSoft / DIADesigner-AX requires a documented design, applicable standards, and project-specific acceptance criteria. This guide organizes practical checks for code structure, diagnostics, testing, and maintenance.

The example references DVP-ES2 / EX2 / SS2 (compact entry)-family terminology, but model capabilities vary. Verify the controller manual, the installed WPLSoft / ISPSoft / DIADesigner-AX version, and any applicable machinery, process, electrical, or functional-safety requirements for the actual project.

Best practices for Bottle Filling encompass multiple dimensions: proper handling of 5 sensor types, safe control of 5 different actuators, managing precise fill volume, and ensuring compliance with relevant industry standards. The Sequential Function Charts (SFC) approach, when properly implemented, provides perfect for sequential processes and clear visualization of process flow, both critical for intermediate to advanced projects.

This guide presents a reviewable approach to Delta Sequential Function Charts (SFC) programming for Bottle Filling, covering code organization, documentation, test procedures, and maintenance handoff. The sample logic is educational and must be compiled, simulated, peer-reviewed, and tested against the project's acceptance criteria before use on equipment.

Delta WPLSoft / ISPSoft / DIADesigner-AX for Bottle Filling

WPLSoft / ISPSoft / DIADesigner-AX is a programming environment associated with Delta controller families such as DVP-ES2 / EX2 / SS2 (compact entry), DVP-SX2 / SA2 / SV2 (motion + analogue), DVP-SE (Ethernet). This guide uses Sequential Function Charts (SFC) terminology from the supplied guide dataset, but controller capabilities and language support can change by model, firmware, software edition, and license.

Verify Before You Start:

The selected controller supports the required Sequential Function Charts (SFC) constructs

The project version matches the installed WPLSoft / ISPSoft / DIADesigner-AX release

Required communications, motion, safety, and simulation options are licensed

Firmware and device-description files are compatible with the project

The vendor manuals used for the design match the exact hardware revision

Application Planning:

For a Bottle Filling exercise, map the required inputs and outputs before writing logic. The example considers 5 sensor types, including Level sensors, Flow meters, Pressure sensors, and 5 actuator types.

Control Equipment for Bottle Filling:

Filling nozzles (gravity, pressure, vacuum)

Product tanks with level control

CIP (clean-in-place) systems

Cap feeding and sorting equipment

Controller-family references used in this guide include:

DVP-ES2 / EX2 / SS2 (compact entry): Confirm CPU, I/O, memory, communications, and Sequential Function Charts (SFC) support in the current selection guide

DVP-SX2 / SA2 / SV2 (motion + analogue): Confirm CPU, I/O, memory, communications, and Sequential Function Charts (SFC) support in the current selection guide

DVP-SE (Ethernet): Confirm CPU, I/O, memory, communications, and Sequential Function Charts (SFC) support in the current selection guide

DVP-EH3 (legacy high-end): Confirm CPU, I/O, memory, communications, and Sequential Function Charts (SFC) support in the current selection guide

Hardware Selection Checklist:

Count local and remote I/O, including planned expansion

Measure the required task and communications update rates

Identify memory, data-retention, diagnostics, and cybersecurity requirements

Treat safety functions as a separate, standards-led design activity

Confirm lifecycle status, regional availability, licensing, and support

Source and Validation Note:

This page does not represent a vendor certification or a hardware acceptance test. Use current Delta manuals, release notes, and safety documentation as the authority for product-specific behavior. Validate adapted logic in a simulator or isolated test setup before connecting it to equipment.

Investment Considerations:

For Bottle Filling projects, compare hardware, software licensing, training, engineering, test equipment, commissioning, spares, and ongoing support. Obtain current pricing and lifecycle information directly from the vendor or an authorized regional supplier.

Understanding Sequential Function Charts (SFC) for Bottle Filling

Sequential Function Chart (SFC) is a graphical language for programming sequential processes. It models systems as a series of steps connected by transitions, ideal for batch processes and machine sequences.

Execution Model:

Only active steps execute their actions. Transitions define conditions for moving between steps. Multiple steps can be active simultaneously in parallel branches.

Core Advantages for Bottle Filling:

Perfect for sequential processes: Critical for Bottle Filling when handling intermediate to advanced control logic

Clear visualization of process flow: Critical for Bottle Filling when handling intermediate to advanced control logic

Easy to understand process steps: Critical for Bottle Filling when handling intermediate to advanced control logic

Good for batch operations: Critical for Bottle Filling when handling intermediate to advanced control logic

Simplifies complex sequences: Critical for Bottle Filling when handling intermediate to advanced control logic

Why Sequential Function Charts (SFC) Fits Bottle Filling:

Bottle Filling systems in Packaging typically involve:

Sensors: Bottle presence sensors (fiber optic or inductive) for container detection, Level sensors (capacitive, ultrasonic, or optical) for fill detection, Load cells for gravimetric (weight-based) filling

Actuators: Servo-driven filling valves for precise flow control, Pneumatic pinch valves for on/off flow control, Bottle handling star wheels and timing screws

Complexity: Intermediate to Advanced with challenges including Preventing dripping and stringing after fill cutoff

Programming Fundamentals in Sequential Function Charts (SFC):

Steps:
- initialStep: Double-bordered box - starting point of sequence, active on program start
- normalStep: Single-bordered box - becomes active when preceding transition fires
- actions: Associated code that executes while step is active

Transitions:
- condition: Boolean expression that must be TRUE to advance
- firing: Transition fires when preceding step is active AND condition is TRUE
- priority: In selective branches, transitions are evaluated in defined order

ActionQualifiers:
- N: Non-stored - executes while step is active
- S: Set - sets output TRUE on step entry, remains TRUE
- R: Reset - sets output FALSE on step entry

Best Practices for Sequential Function Charts (SFC):

Start with a clear process flow diagram before implementing SFC

Use descriptive step names indicating what happens (e.g., Filling, Heating)

Keep transition conditions simple - complex logic goes in action code

Implement timeout transitions to prevent stuck sequences

Always provide a path back to initial step for reset/restart

Common Mistakes to Avoid:

Forgetting to include stop/abort transitions for emergency handling

Creating deadlocks where no transition can fire

Not handling the case where transition conditions never become TRUE

Using S (Set) actions without corresponding R (Reset) actions

Typical Applications:

1. Bottle filling: Directly applicable to Bottle Filling
2. Assembly sequences: Related control patterns
3. Material handling: Related control patterns
4. Batch mixing: Related control patterns

Understanding these fundamentals prepares you to implement effective Sequential Function Charts (SFC) solutions for Bottle Filling using Delta WPLSoft / ISPSoft / DIADesigner-AX.

Implementing Bottle Filling with Sequential Function Charts (SFC)

Bottle filling control systems manage the precise dispensing of liquids into containers at high speeds while maintaining accuracy and preventing spillage. PLCs coordinate container handling, fill control, capping, and quality inspection in an integrated packaging line.

This walkthrough demonstrates practical implementation using Delta WPLSoft / ISPSoft / DIADesigner-AX and Sequential Function Charts (SFC) programming.

System Requirements:

A typical Bottle Filling implementation includes:

Input Devices (Sensors):
1. Bottle presence sensors (fiber optic or inductive) for container detection: Critical for monitoring system state
2. Level sensors (capacitive, ultrasonic, or optical) for fill detection: Critical for monitoring system state
3. Load cells for gravimetric (weight-based) filling: Critical for monitoring system state
4. Flow meters (magnetic or mass flow) for volumetric filling: Critical for monitoring system state
5. Encoder feedback for rotary filler position: Critical for monitoring system state

Output Devices (Actuators):
1. Servo-driven filling valves for precise flow control: Primary control output
2. Pneumatic pinch valves for on/off flow control: Supporting control function
3. Bottle handling star wheels and timing screws: Supporting control function
4. Capping chuck drives (servo or pneumatic): Supporting control function
5. Torque limiters for cap tightening: Supporting control function

Control Equipment:

Filling nozzles (gravity, pressure, vacuum)

Product tanks with level control

CIP (clean-in-place) systems

Cap feeding and sorting equipment

Control Strategies for Bottle Filling:

1. Primary Control: Automated bottle filling and capping systems using PLCs for precise volume control, speed optimization, and quality assurance.
2. Safety Interlocks: Preventing Precise fill volume
3. Error Recovery: Handling High-speed operation

Implementation Steps:

Step 1: Characterize product flow properties (viscosity, foaming, temperature sensitivity)

In WPLSoft / ISPSoft / DIADesigner-AX, characterize product flow properties (viscosity, foaming, temperature sensitivity).

Step 2: Determine fill method based on accuracy requirements and product type

In WPLSoft / ISPSoft / DIADesigner-AX, determine fill method based on accuracy requirements and product type.

Step 3: Design container handling for smooth, jam-free operation

In WPLSoft / ISPSoft / DIADesigner-AX, design container handling for smooth, jam-free operation.

Step 4: Implement fill sequence with proper valve timing and deceleration

In WPLSoft / ISPSoft / DIADesigner-AX, implement fill sequence with proper valve timing and deceleration.

Step 5: Add bulk/dribble transition logic for gravimetric filling

In WPLSoft / ISPSoft / DIADesigner-AX, add bulk/dribble transition logic for gravimetric filling.

Step 6: Program calibration routines for automatic fill adjustment

In WPLSoft / ISPSoft / DIADesigner-AX, program calibration routines for automatic fill adjustment.

Delta Function Design:

WPLSoft P-labels are the primary reuse mechanism on DVP. ISPSoft instance-based function blocks enable proper IEC-style reuse on AH / AS, with library import / export. Delta-supplied motion, communication, and PID FBs ship with the IDE.

Common Challenges and Solutions:

1. Preventing dripping and stringing after fill cutoff

Solution: Sequential Function Charts (SFC) addresses this through Perfect for sequential processes.

2. Handling foaming products that give false level readings

Solution: Sequential Function Charts (SFC) addresses this through Clear visualization of process flow.

3. Maintaining accuracy at high speeds

Solution: Sequential Function Charts (SFC) addresses this through Easy to understand process steps.

4. Synchronizing multi-head rotary fillers

Solution: Sequential Function Charts (SFC) addresses this through Good for batch operations.

Safety Considerations:

Guarding around rotating components

Interlocked access doors with safe stop

Bottle breakage detection and containment

Overpressure protection for pressure filling

Chemical handling safety for cleaning solutions

Performance Metrics:

Task and I/O timing: Record minimum, average, and maximum values under a defined test load

Accuracy: Define an acceptable tolerance and compare it with calibrated reference measurements

Throughput: Count completed cycles over a fixed interval and record rejected or incomplete cycles

Fault response: Measure detection, safe-state, alarm, and recovery behavior for each test case

Resource use: Record memory, communications load, and diagnostic-buffer behavior

Delta Diagnostic Tools:

WPLSoft / ISPSoft online monitor with rung-state colour,Soft-element watch table and tag watch lists,Built-in offline simulator (WPLSoft and ISPSoft),Modbus RTU / TCP communication wizard with diagnostic counters,DIADesigner-AX integrated diagnostics for AX motion projects,M1000-range system flags for CPU and comms diagnostics,Delta distributor support and loaner CPUs in major markets,Delta IA forum and DeltaPLC community for application questions

Use the monitoring and diagnostic functions available in your WPLSoft / ISPSoft / DIADesigner-AX version, and record the software, firmware, hardware, workload, and test procedure with every result.

Delta Sequential Function Charts (SFC) Example for Bottle Filling

Illustrative Sequential Function Charts (SFC) example for Bottle Filling using Delta terminology. Adapt the syntax to your WPLSoft / ISPSoft / DIADesigner-AX release, compile it, and verify it in an isolated test environment before use on equipment.

// Delta WPLSoft / ISPSoft / DIADesigner-AX - Bottle Filling Control
// Sequential Function Charts (SFC) Implementation for Packaging
// WPLSoft / DVP work is dominated by raw soft-element addressi

// ============================================
// Variable Declarations
// ============================================
VAR
    bEnable : BOOL := FALSE;
    bEmergencyStop : BOOL := FALSE;
    rLevelsensors : REAL;
    rServomotors : REAL;
END_VAR

// ============================================
// Input Conditioning - Bottle presence sensors (fiber optic or inductive) for container detection
// ============================================
// Standard input processing
IF rLevelsensors > 0.0 THEN
    bEnable := TRUE;
END_IF;

// ============================================
// Safety Interlock - Guarding around rotating components
// ============================================
IF bEmergencyStop THEN
    rServomotors := 0.0;
    bEnable := FALSE;
END_IF;

// ============================================
// Main Bottle Filling Control Logic
// ============================================
IF bEnable AND NOT bEmergencyStop THEN
    // Bottle filling control systems manage the precise dispensing
    rServomotors := rLevelsensors * 1.0; (* Illustrative scaling only *)

    // Process monitoring
    // Add specific control logic here
ELSE
    rServomotors := 0.0;
END_IF;

Code Explanation:

1.Sequential Function Charts (SFC) structure organized for a Bottle Filling training example
2.Input conditioning handles Bottle presence sensors (fiber optic or inductive) for container detection signals
3.Safety interlock ensures Guarding around rotating components always takes priority
4.Main control implements Bottle filling control systems manage th
5.Adapt the scan-cycle assumptions to the selected DVP-ES2 / EX2 / SS2 (compact entry) task configuration and verify them by measurement

Best Practices

✓Follow Delta naming conventions: WPLSoft / DVP work is dominated by raw soft-element addressing (X0, Y0, M100, D1
✓Delta function design: WPLSoft P-labels are the primary reuse mechanism on DVP. ISPSoft instance-based
✓Data organization: DVP has no structured data blocks — D / register banks are documented by range.
✓Sequential Function Charts (SFC): Start with a clear process flow diagram before implementing SFC
✓Sequential Function Charts (SFC): Use descriptive step names indicating what happens (e.g., Filling, Heating)
✓Sequential Function Charts (SFC): Keep transition conditions simple - complex logic goes in action code
✓Bottle Filling: Use minimum 10 readings for statistical fill tracking
✓Bottle Filling: Implement automatic re-zero of scales at regular intervals
✓Bottle Filling: Provide separate parameters for each product recipe
✓Debug with WPLSoft / ISPSoft / DIADesigner-AX: Run the offline simulator with forced inputs before live download
✓Safety: Guarding around rotating components
✓Use a compatible simulator or isolated test rig to test Bottle Filling logic before deployment

Common Pitfalls to Avoid

⚠Sequential Function Charts (SFC): Forgetting to include stop/abort transitions for emergency handling
⚠Sequential Function Charts (SFC): Creating deadlocks where no transition can fire
⚠Sequential Function Charts (SFC): Not handling the case where transition conditions never become TRUE
⚠Delta common error: Battery-low alarm on legacy DVP-EH causing D-range data loss
⚠Bottle Filling: Preventing dripping and stringing after fill cutoff
⚠Bottle Filling: Handling foaming products that give false level readings
⚠Neglecting to validate Bottle presence sensors (fiber optic or inductive) for container detection leads to control errors
⚠Insufficient comments make Sequential Function Charts (SFC) programs unmaintainable over time

Related Certifications

🏆Delta IA Academy distributor-led engineer training

🏆WPLSoft / ISPSoft course completions

🏆DIADesigner-AX motion specialist tracks for AX-series engineers

Applying Sequential Function Charts (SFC) to Bottle Filling using Delta WPLSoft / ISPSoft / DIADesigner-AX requires understanding the platform, the process, and the project's acceptance criteria. This guide has covered implementation structure, an illustrative code example, verification practices, and common pitfalls for a intermediate to advanced Bottle Filling exercise.

Use the practices outlined here to create a design that can be reviewed and tested. Define performance targets in the project requirements and confirm them with repeatable measurements.

Next Steps:

1. Check Sources: Read the current WPLSoft / ISPSoft / DIADesigner-AX help, controller manual, release notes, and relevant standards
2. Practice Safely: Adapt the example in a simulator or isolated training setup
3. Review: Have the I/O map, state behavior, faults, and recovery steps reviewed
4. Test: Record normal, boundary, fault, restart, and communications test results

Sequential Function Charts (SFC) Foundation:

Sequential Function Chart (SFC) is a graphical language for programming sequential processes. It models systems as a series of steps connected by tran...

Project duration depends on scope, reviews, hardware availability, software and firmware versions, testing, commissioning, and site constraints. Remember: Use minimum 10 readings for statistical fill tracking

For further learning, explore related topics including Assembly sequences, Pharmaceutical liquid filling, and Delta platform-specific features for Bottle Filling optimization.