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Defines payload capacity and alarm thresholds for the OSD 5.
Details how to compensate for the weight of the trailing cable.
Instructions for setting the zero calibration point for the OSD 5.
Steps to calibrate the OSD 5 with a known load.
Guides users through setting system parameters for the OSD 5 device.
Step-by-step guide for performing zero calibration on the OSD 5 device.
Instructions for calibrating the OSD 5 device with a known weight.
How to perform load calibration using pre-defined default values.
How to view the currently stored system parameters in the OSD 5.
Performing system tests and understanding zero functions in work mode.
Procedure for updating the OSD 5 device software.
Explanation of the failsafe mode function and its usage.
Details on the digital inputs and the relay function of the OSD 5.
How to set up and activate the trailing cable compensation feature.
Methods for verifying OSD 5 operation and parameters.
Overview of special functions and their configurations (Func0-Func8).
Information regarding display indicators and function behavior.
Details pin-to-pin connections for load cells and supply voltage.
Explains various error codes and informational messages displayed by the OSD 5.
Lists error codes related to trailing cable compensation and solenoid status.
Guide for accessing and interpreting debug information for troubleshooting.
The Alimak OSD 5 is an optional Overload Sensing Device designed to enhance the safety and operational efficiency of hoists and lifts. This system monitors the load within the car, indicating when it is fully loaded and preventing operation under overload conditions.
The OSD 5 system integrates load cells into the pull rods that connect the machinery to the car structure. These load cells measure the weight within the car, and their signals are transmitted to the OSD 5 amplifier, typically located in the M-panel. When the rated load is exceeded, the control circuit of the hoist is automatically switched off to prevent its use, and a red LED light is activated to indicate the overload condition. For hoists equipped with an ALC (Alimak Lift Control) system, an overload will trigger fault code F4 on the display.
The OSD 5 offers various operational modes and functions:
Calibration Mode – System Setup: This mode allows for the configuration of system parameters, including payload and alarm limits. Users can adjust settings such as Payload (400 kg - 30000 kg), Overload (R1, 100-120% of payload), Full load (R2, 30-100% of payload), Underload (R3, absolute values not less than hysteresis), and Hysteresis (Hst, not less than 75 kg and not more than 10% of payload, or bigger than 80 kg). Load Calibration can be set between 50-120%. The system setup is accessed by pressing "Prog." and "Zero" buttons, then using "Cal." to navigate parameters and "Zero" and "Load" to adjust values. All changed parameters must be tabbed through before returning to the Weight display to ensure they are stored.
Calibration Mode – Zero Calibration: This procedure establishes the "empty car" weight. It is initiated by pressing "Prog." and "Zero" buttons, then selecting "Zero" from the menu. The lift/hoist must be empty (no load). Pressing "Cal." starts a countdown from 10 to 1, allowing the operator to exit the car. Upon completion, the zero point is automatically calibrated and stored.
Calibration Mode – Load Calibration: This procedure calibrates the system with a known weight. It is initiated by pressing "Prog." and "Zero" buttons, then selecting "Load" from the menu. A calibration weight, ideally 100% of the payload (but at least 50%), must be placed in the car. The stored weight value is adjusted to match the calibration weight using "Zero" and "Load" buttons. Similar to zero calibration, pressing "Cal." starts a countdown, allowing the operator to exit the car. The calibration weight is automatically stored upon completion.
Calibration Mode – Load Calibration with Default Values: This is an automatic calibration method that uses predefined values for specific Alimak models (e.g., Scando 650, Scando 450, 6-ton load cell). This method sets both load and zero values. It requires the car to be empty.
Work Mode – View Current System Parameters: This mode allows operators to view the stored system parameters, such as Elevator Capacity, Relay 1 and 2 Alarm capacities, and Reset values. Parameters marked with an asterisk can be altered in "Cal. mode."
Work Mode – System Test and Zero Functions: This mode allows for testing inputs and outputs. Pressing and holding "Prog." displays input and output states. The "Load" button activates a self-diagnostic system test, which sequences through the instrument's hardware components to ensure operational status. The display also shows the software version (S 1.xx) and indicates whether the device is wired to ALC II CAN interface ("CAn") or relay control ("RELAY").
Failsafe Mode: This function is for situations of over or under load, such as running against buffer springs or during a drop test. Activated by pressing the "Zero" button for 5 seconds, it displays "InSP" for inspection mode or "- - ---" otherwise. If connected to CAN, five trips are allowed; otherwise, a maximum of two trips are possible.
Relay Function: The OSD 5 has two digital inputs (+24VDC). DI1 is activated when the lift/hoist is stationary and brakes are engaged. DI2 is activated when doors are closed, enabling measurement and potential operation based on weight. After a power failure, 10% extra weight is approved for the first trip, indicated by synchronized flashing dots on the display. Subsequent trips show out-of-sync flashing dots.
Trailing Cable Compensation: This function compensates for the weight of the trailing cable. It is activated by setting a function bit and performing a Zero Calibration at the bottom floor, then traveling to the highest possible point and performing another Zero Calibration. Cable weight can be set between 0.9 - 4.8 kg/m, with a maximum compensation of 250 kg per load cell or 10 kg/m.
Verification: In "Work mode," pressing the "Zero" button displays the difference between load cells. Pressing "Prog." followed by "Zero" displays the temperature.
Extra Functions (Func0-Func8): These functions offer specialized behaviors:
General| Brand | Alimak |
|---|---|
| Model | OSD 5 |
| Category | Security Sensors |
| Language | English |
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