A large cold chain enterprise has built a new automated cold storage facility using stacker cranes for goods handling. The warehouse operates continuously at -20°C, requiring uninterrupted 24/7 operation. The control system is based on a Siemens S7-1500 PLC, which controls the stacker crane’s travel, lifting, and fork axes via PROFINET communication.
Low-Temperature Challenges Faced by the Equipment
01. Ability to withstand low temperatures
Conventional motors often fail at -20°C due to issues such as magnetic demagnetization, solidification of bearing lubrication grease, and material embrittlement. Therefore, specially designed low-temperature-resistant motors are required.
02. Communication compatibility
The system uses a Siemens S7-1500 PLC and must support PROFINET communication as well as Standard Telegram 3 to enable coordinated positioning control with PLC technology objects.
03. Position retention after power loss
In case of power failure or defrost cycles in the cold storage, the stacker crane should resume operation immediately without re-homing. The encoder must be capable of position memory without relying on batteries, as batteries may fail under low-temperature conditions.
04. High positioning accuracy
The positioning error for goods handling must be controlled within ±5 mm.
SENYD Solution
| Equipment | Configuration |
| High and Low Temperature Servo Motor: | SENYD SYDL100 Series |
| Servo Drive: | EXPSION EHSD20 Series |
| Control Mode: | Absolute Positioning |
| Encoder: | Multi-turn mechanical absolute encoder (battery-free) |
Motor: Designed for Low-Temperature Applications
SENYD high and low temperature motors can operate normally within a temperature range of -40°C to +80°C. Special low-temperature bearing grease and magnetic materials ensure strong and stable performance even at -20°C. The motor has passed long-duration low-temperature testing at -40°C.
Encoder: Pure Mechanical Memory, No Position Loss
A mechanical multi-turn absolute encoder is used. It records rotation via a gear system, similar to a mechanical odometer. Position data is retained even after power loss, without the need for a battery, making it highly reliable in low-temperature environments.
Drive System: Naturally Compatible with Siemens PLC
The EXPSION EHSD20 series supports PROFINET communication and Standard Telegram 3. By importing the drive GSD file into TIA Portal and selecting Telegram 3, configuration can be completed easily.
Control Mode: Fully Closed-Loop, High-Precision Positioning
The motor encoder feeds actual position data back to the drive, which transmits it to the PLC in real time via PROFINET Telegram 3. The PLC continuously compares the target position with the actual position and corrects commands dynamically, ensuring high positioning accuracy. Even if there is mechanical backlash in the transmission system, the PLC can detect and compensate for it in real time.
Core Advantages of the Solution
1. Low-temperature resistance for long-term operation
The motor can operate continuously at -20°C, eliminating the common freezing-related failures found in standard motors.
2. Seamless communication integration
Native PROFINET support with Standard Telegram 3 enables seamless integration with Siemens S7-1500 PLC systems, allowing fast and simple configuration and commissioning.
3. Power-loss memory, no re-homing required
The mechanical absolute encoder retains position data without power. Upon startup, the system immediately knows its position, eliminating the need for re-homing.
4. Maintenance-free and worry-free operation
No battery is required, removing the need for periodic battery replacement in sub-zero environments—safer, more reliable, and more cost-efficient.
5. Cost-effective domestic solution
Faster delivery and responsive technical support, with overall cost advantages compared to imported brands while maintaining strong performance and reliability.
SENYD high and low temperature servo motors have been successfully applied in multiple projects such as low-temperature cold storage, food processing, and environmental test chambers. The systems operate stably under working conditions ranging from -40°C to +80°C, and the performance has been widely recognized by customers.
If you also have driving requirements for low-temperature warehousing or low-temperature production lines—whether for stacker cranes, conveyor systems, or other low-temperature automation equipment—you can confidently choose SENYD high and low temperature motors.
Feel free to contact us at any time for detailed specifications and quotations. SENYD can provide tailored solutions based on your actual operating conditions.
SENYD | Extreme Environment Motion Control Solutions
SENYD specializes in high and low temperature motors, vacuum motors, high-speed motors, and customized servo systems, providing stable and reliable motion control solutions for industries such as automotive testing, semiconductor equipment, aerospace, scientific research, and new energy testing.
For complex operating conditions such as high temperature, low temperature, vacuum, high speed, and long-duration durability testing, SENYD offers one-stop technical support ranging from motor selection, parameter matching, structural customization, to on-site commissioning, helping customers improve equipment stability and testing data consistency.
Application Scenarios:
Automotive door lock durability testing | Door sealing strip testing | Seat rail testing | Axle testing | Bearing testing | Environmental chamber testing | Vacuum chamber motion control | High-speed test benches
