Intermediate20 min readLogistics & Warehousing

ABB Timers for Material Handling

Learn Timers programming for Material Handling using ABB Automation Builder. Includes code examples, best practices, and step-by-step implementation guide for Logistics & Warehousing applications.

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Platform
Automation Builder
📊
Complexity
Intermediate to Advanced
⏱️
Project Duration
4-12 weeks
Learning to implement Timers for Material Handling using ABB's Automation Builder is an essential skill for PLC programmers working in Logistics & Warehousing. This comprehensive guide walks you through the fundamentals, providing clear explanations and practical examples that you can apply immediately to real-world projects. ABB has established itself as Medium - Strong in power generation, mining, and marine applications, making it a strategic choice for Material Handling applications. With 8% global market share and 3 popular PLC families including the AC500 and AC500-eCo, ABB provides the robust platform needed for intermediate to advanced complexity projects like Material Handling. The Timers approach is particularly well-suited for Material Handling because any application requiring time delays, time-based sequencing, or time monitoring. This combination allows you to leverage simple to implement while managing the typical challenges of Material Handling, including route optimization and traffic management. Throughout this guide, you'll discover step-by-step implementation strategies, working code examples tested on Automation Builder, and industry best practices specific to Logistics & Warehousing. Whether you're programming your first Material Handling system or transitioning from another PLC platform, this guide provides the practical knowledge you need to succeed with ABB Timers programming.

ABB Automation Builder for Material Handling

Automation Builder provides ABB's unified environment for AC500 PLC programming, drive configuration, and HMI development. Built on CODESYS V3 with ABB-specific enhancements. Strength lies in seamless drive integration with ACS880 and other families....

Platform Strengths for Material Handling:

  • Excellent for robotics integration

  • Strong in power and utilities

  • Robust hardware for harsh environments

  • Good scalability


Unique ${brand.software} Features:

  • Integrated drive configuration for ACS880, ACS580 drives

  • Extensive application libraries: HVAC, pumping, conveying, crane control

  • Safety programming for AC500-S within standard project

  • Panel Builder 600 HMI development integrated


Key Capabilities:

The Automation Builder environment excels at Material Handling applications through its excellent for robotics integration. This is particularly valuable when working with the 5 sensor types typically found in Material Handling systems, including Laser scanners, RFID readers, Barcode scanners.

Control Equipment for Material Handling:

  • Automated storage and retrieval systems (AS/RS)

  • Automated guided vehicles (AGVs/AMRs)

  • Vertical lift modules (VLMs)

  • Carousel systems (horizontal and vertical)


ABB's controller families for Material Handling include:

  • AC500: Suitable for intermediate to advanced Material Handling applications

  • AC500-eCo: Suitable for intermediate to advanced Material Handling applications

  • AC500-S: Suitable for intermediate to advanced Material Handling applications

Hardware Selection Guidance:

PM554 entry-level for simple applications. PM564 mid-range for OEM machines. PM573 high-performance for complex algorithms. PM5 series latest generation with cloud connectivity. AC500-S for integrated safety....

Industry Recognition:

Medium - Strong in power generation, mining, and marine applications. AC500 coordinating VFD-controlled motors with ACS880 drives. Energy optimization reducing consumption 25-40%. Robot integration via ABB robot interfaces. Press line automation with AC500-S safety....

Investment Considerations:

With $$ pricing, ABB positions itself in the mid-range segment. For Material Handling projects requiring advanced skill levels and 4-12 weeks development time, the total investment includes hardware, software licensing, training, and ongoing support.

Understanding Timers for Material Handling

PLC timers measure elapsed time to implement delays, pulses, and timed operations. They use accumulated time compared against preset values to control outputs.

Execution Model:

For Material Handling applications, Timers offers significant advantages when any application requiring time delays, time-based sequencing, or time monitoring.

Core Advantages for Material Handling:

  • Simple to implement: Critical for Material Handling when handling intermediate to advanced control logic

  • Highly reliable: Critical for Material Handling when handling intermediate to advanced control logic

  • Essential for most applications: Critical for Material Handling when handling intermediate to advanced control logic

  • Easy to troubleshoot: Critical for Material Handling when handling intermediate to advanced control logic

  • Widely supported: Critical for Material Handling when handling intermediate to advanced control logic


Why Timers Fits Material Handling:

Material Handling systems in Logistics & Warehousing typically involve:

  • Sensors: Barcode scanners for product/location identification, RFID readers for pallet and container tracking, Photoelectric sensors for load presence detection

  • Actuators: Conveyor motors and drives, Crane bridge, hoist, and trolley drives, Shuttle car drives

  • Complexity: Intermediate to Advanced with challenges including Maintaining inventory accuracy in real-time


Programming Fundamentals in Timers:

Timers in Automation Builder follows these key principles:

1. Structure: Timers organizes code with highly reliable
2. Execution: Scan cycle integration ensures 5 sensor inputs are processed reliably
3. Data Handling: Proper data types for 5 actuator control signals

Best Practices for Timers:

  • Use constants or parameters for preset times - avoid hardcoded values

  • Add timer status to HMI for operator visibility

  • Implement timeout timers for fault detection in sequences

  • Use appropriate timer resolution for the application

  • Document expected timer values in comments


Common Mistakes to Avoid:

  • Using TON when TOF behavior is needed or vice versa

  • Not resetting RTO timers, causing unexpected timeout

  • Timer preset too short relative to scan time causing missed timing

  • Using software timers for safety-critical timing


Typical Applications:

1. Motor start delays: Directly applicable to Material Handling
2. Alarm delays: Related control patterns
3. Process timing: Related control patterns
4. Conveyor sequencing: Related control patterns

Understanding these fundamentals prepares you to implement effective Timers solutions for Material Handling using ABB Automation Builder.

Implementing Material Handling with Timers

Material handling automation uses PLCs to control the movement, storage, and retrieval of materials in warehouses, distribution centers, and manufacturing facilities. These systems optimize storage density, picking efficiency, and inventory accuracy.

This walkthrough demonstrates practical implementation using ABB Automation Builder and Timers programming.

System Requirements:

A typical Material Handling implementation includes:

Input Devices (Sensors):
1. Barcode scanners for product/location identification: Critical for monitoring system state
2. RFID readers for pallet and container tracking: Critical for monitoring system state
3. Photoelectric sensors for load presence detection: Critical for monitoring system state
4. Height and dimension sensors for load verification: Critical for monitoring system state
5. Position encoders for crane and shuttle systems: Critical for monitoring system state

Output Devices (Actuators):
1. Conveyor motors and drives: Primary control output
2. Crane bridge, hoist, and trolley drives: Supporting control function
3. Shuttle car drives: Supporting control function
4. Fork positioning and load handling: Supporting control function
5. Vertical lift mechanisms: Supporting control function

Control Equipment:

  • Automated storage and retrieval systems (AS/RS)

  • Automated guided vehicles (AGVs/AMRs)

  • Vertical lift modules (VLMs)

  • Carousel systems (horizontal and vertical)


Control Strategies for Material Handling:

1. Primary Control: Automated material movement using PLCs for warehouse automation, AGVs, and logistics systems.
2. Safety Interlocks: Preventing Route optimization
3. Error Recovery: Handling Traffic management

Implementation Steps:

Step 1: Map all storage locations with addressing scheme

In Automation Builder, map all storage locations with addressing scheme.

Step 2: Define product characteristics (size, weight, handling requirements)

In Automation Builder, define product characteristics (size, weight, handling requirements).

Step 3: Implement location tracking database interface

In Automation Builder, implement location tracking database interface.

Step 4: Program crane/shuttle motion control with positioning

In Automation Builder, program crane/shuttle motion control with positioning.

Step 5: Add load verification (presence, dimension, weight)

In Automation Builder, add load verification (presence, dimension, weight).

Step 6: Implement WMS interface for task assignment

In Automation Builder, implement wms interface for task assignment.


ABB Function Design:

Standard FB structure with VAR_INPUT/OUTPUT/VAR. Methods extend functionality. ABB application libraries provide tested FBs. Drive FBs wrap drive parameter access.

Common Challenges and Solutions:

1. Maintaining inventory accuracy in real-time

  • Solution: Timers addresses this through Simple to implement.


2. Handling damaged or misplaced loads

  • Solution: Timers addresses this through Highly reliable.


3. Coordinating multiple cranes in same aisle

  • Solution: Timers addresses this through Essential for most applications.


4. Optimizing storage assignment dynamically

  • Solution: Timers addresses this through Easy to troubleshoot.


Safety Considerations:

  • Aisle entry protection with light curtains and interlocks

  • Personnel detection in automated zones

  • Safe positioning for maintenance access

  • Overload protection for cranes and lifts

  • Fire suppression system integration


Performance Metrics:

  • Scan Time: Optimize for 5 inputs and 5 outputs

  • Memory Usage: Efficient data structures for AC500 capabilities

  • Response Time: Meeting Logistics & Warehousing requirements for Material Handling

ABB Diagnostic Tools:

Online monitoring with live values,Watch window with expressions,Breakpoints for inspection,Drive diagnostics showing fault history,Communication diagnostics for network statistics

ABB's Automation Builder provides tools for performance monitoring and optimization, essential for achieving the 4-12 weeks development timeline while maintaining code quality.

ABB Timers Example for Material Handling

Complete working example demonstrating Timers implementation for Material Handling using ABB Automation Builder. Follows ABB naming conventions. Tested on AC500 hardware.

// ABB Automation Builder - Material Handling Control
// Timers Implementation for Logistics & Warehousing
// g_ prefix for globals. i_/q_ for FB I/O. Type prefixes: b=BO

// ============================================
// Variable Declarations
// ============================================
VAR
    bEnable : BOOL := FALSE;
    bEmergencyStop : BOOL := FALSE;
    rLaserscanners : REAL;
    rAGVmotors : REAL;
END_VAR

// ============================================
// Input Conditioning - Barcode scanners for product/location identification
// ============================================
// Standard input processing
IF rLaserscanners > 0.0 THEN
    bEnable := TRUE;
END_IF;

// ============================================
// Safety Interlock - Aisle entry protection with light curtains and interlocks
// ============================================
IF bEmergencyStop THEN
    rAGVmotors := 0.0;
    bEnable := FALSE;
END_IF;

// ============================================
// Main Material Handling Control Logic
// ============================================
IF bEnable AND NOT bEmergencyStop THEN
    // Material handling automation uses PLCs to control the moveme
    rAGVmotors := rLaserscanners * 1.0;

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

Code Explanation:

  • 1.Timers structure optimized for Material Handling in Logistics & Warehousing applications
  • 2.Input conditioning handles Barcode scanners for product/location identification signals
  • 3.Safety interlock ensures Aisle entry protection with light curtains and interlocks always takes priority
  • 4.Main control implements Material handling automation uses PLCs t
  • 5.Code runs every scan cycle on AC500 (typically 5-20ms)

Best Practices

  • Follow ABB naming conventions: g_ prefix for globals. i_/q_ for FB I/O. Type prefixes: b=BOOL, n=INT, r=REAL, s
  • ABB function design: Standard FB structure with VAR_INPUT/OUTPUT/VAR. Methods extend functionality. A
  • Data organization: DUTs define structures. GVLs group related data. Retain attribute preserves vari
  • Timers: Use constants or parameters for preset times - avoid hardcoded values
  • Timers: Add timer status to HMI for operator visibility
  • Timers: Implement timeout timers for fault detection in sequences
  • Material Handling: Verify load presence before and after each move
  • Material Handling: Implement inventory checkpoints for reconciliation
  • Material Handling: Use location states to prevent double storage
  • Debug with Automation Builder: Use structured logging to controller log
  • Safety: Aisle entry protection with light curtains and interlocks
  • Use Automation Builder simulation tools to test Material Handling logic before deployment

Common Pitfalls to Avoid

  • Timers: Using TON when TOF behavior is needed or vice versa
  • Timers: Not resetting RTO timers, causing unexpected timeout
  • Timers: Timer preset too short relative to scan time causing missed timing
  • ABB common error: Exception 'AccessViolation': Null pointer access
  • Material Handling: Maintaining inventory accuracy in real-time
  • Material Handling: Handling damaged or misplaced loads
  • Neglecting to validate Barcode scanners for product/location identification leads to control errors
  • Insufficient comments make Timers programs unmaintainable over time

Related Certifications

🏆ABB Automation Certification
Mastering Timers for Material Handling applications using ABB Automation Builder requires understanding both the platform's capabilities and the specific demands of Logistics & Warehousing. This guide has provided comprehensive coverage of implementation strategies, working code examples, best practices, and common pitfalls to help you succeed with intermediate to advanced Material Handling projects. ABB's 8% market share and medium - strong in power generation, mining, and marine applications demonstrate the platform's capability for demanding applications. The platform excels in Logistics & Warehousing applications where Material Handling reliability is critical. By following the practices outlined in this guide—from proper program structure and Timers best practices to ABB-specific optimizations—you can deliver reliable Material Handling systems that meet Logistics & Warehousing requirements. **Next Steps for Professional Development:** 1. **Certification**: Pursue ABB Automation Certification to validate your ABB expertise 3. **Hands-on Practice**: Build Material Handling projects using AC500 hardware 4. **Stay Current**: Follow Automation Builder updates and new Timers features **Timers Foundation:** PLC timers measure elapsed time to implement delays, pulses, and timed operations. They use accumulated time compared against preset values to control... The 4-12 weeks typical timeline for Material Handling projects will decrease as you gain experience with these patterns and techniques. Remember: Verify load presence before and after each move For further learning, explore related topics including Alarm delays, AGV systems, and ABB platform-specific features for Material Handling optimization.