The Berger Lahr / SIG Positec WPM-311.03401 (part of the WPM-311 series) is a high-performance 4-axis compact multi-axis positioning and sequence controller designed for complex industrial motion and automation tasks. Developed originally by Berger Lahr (later integrated under SIG Positec / Schneider Electric motion control portfolios), the WPM-311 combines native programmable logic controller (PLC) functionality with advanced motion programming, frequently deployed in multi-axis handling systems, CNC machinery, and precision robotic setups.
Key Specifications & Identification
| Attribute | Details |
| Manufacturer | Berger Lahr / SIG Positec (Schneider Electric legacy) |
| Model Series | WPM-311 Multi-Axis Positioning Unit |
| Specific Part Number | WPM-311.03401 (WPM311.03401) |
| Axis Control Capacity | Up to 4 independent or interpolated axes (without integrated power controller stage) |
| Programming Standard | IEC 1131-3 compliance (via BPRO3 programming software environment) |
| Inputs / Outputs | 40 freely assignable digital inputs and 10 freely assignable digital outputs standard |
| Communication Interfaces | RS-232, RS-485 (Low/High Speed), optional fieldbus modules (e.g., Profibus-DP, Interbus) |
| Feedback & I/O Expansion | Dedicated encoder interfaces per axis; expandable via MP 926 remote I/O subcards |
| Power Supply | Standard industrial 24 V DC control board supply voltage |
Primary System Functions
- Interpolated & Independent Motion Control: Supports coordinated multi-axis path interpolation (such as 2-axis linear/circular interpolation) alongside asynchronous motion profiles on remaining axes.
- Integrated PLC Sequence Execution: Combines motion profiles with internal sequential logic control (40 inputs / 10 outputs), handling fast machine interlocking without requiring a separate standalone PLC.
- Power Controller Interface: Communicates precise pulse-and-direction signals, enable logic, and thermal status feedback to external modular drive amplifiers and stepper/servo power controllers.
- Fieldbus & Serial Networking: Connects to upper-level supervisory control systems, operator panels, or factory networks via integrated serial ports or modular fieldbus cards.
Servicing & Installation Guidelines
- Qualified Personnel Requirement: Installation, parameterization, and wiring adjustments must be executed by qualified electrical technicians familiar with industrial drive technology and safety standards.
- ESD & Handling Precautions: The internal microprocessors and CMOS interface logic are sensitive to electrostatic discharge. Always utilize a grounded wrist strap when handling the unhoused or rack-mounted controller module.
- Firmware & Configuration Backup: Maintain a digital backup of the application project file (
.proor equivalent BPRO3 program files) before swapping controller hardware to ensure seamless restoration of axis scaling, homing parameters, and logic sequences. - Shielding & Cabling Integrity: Route encoder feedback lines and serial communication cables separately from high-voltage motor power leads inside metallic control enclosures to prevent electromagnetic interference (EMI) jitter.
