4.9.11 Control and control functions
Each hoist control is equipped with an electronic control device. This electronic control
device functions as a central safety device for the overload safety device and as motor
control and monitoring unit. The device functions are adapted to the different hoist and
drive types and the particular function modules selected (load limits, pole-changing or
frequency-controlled motors, etc.) by parameterising the device.
Two variants are used for this electronic control pendant:
Variant 1
• SLE load monitor
• Standard control
• Parameterized with HEX and DIP switches
Variant 2
• SMC multi-controller
• Extended functions - optional device
• Parameterized with config-tool and RS232 data interface or a USB interface
The following safety functions are integrated into the electronic control devices:
• Overload safety device
• Crane test possible with the aid of test button
• Protection against unexpected start-up
• Control of hoist motors with motor management
In addition, the devices perform the following non-safety-relevant control functions:
• Recording operating hours
• Temperature control for hoist and travel motors
• Display of system status
The general description of the control merely provides an outline. Detailed information on
technical data, functions, integrating the control supplied into superordinate crane
controls and troubleshooting are described in separate operating instructions for the
electronic control devices and shown in the circuit diagrams. The same applies for
frequency inverter controls.
Controls by others
• If the unit is being supplied less controls. CMCO cannot guarantee hoist / motor
performance utilizing controls not recommended or provided by CMCO.
• If the controls are supplied by others, connect the temperature sensors of the hoist
and travel motors, the hoist brake, the overload safety device and the emergency
hoist limit switch according to the connection diagrams.
• Do not connect any live lead to the temperature sensors! Damaged temperature
sensors cannot protect the motor.
• When integrating the supplied control sections into an overall control, the product
standards for hoists and technical specifications as regards functionality, signal
sequence and timing of this control must be observed. The circuit diagrams and block
circuit diagrams supplied as hoist documentation must be followed and implemented
by the customer when constructing the control. The system builder is responsible for
the system as a whole.
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