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Aerial working platforms

Equipped with CANopen

TTControl (Austria) has been selected by Imer Access, a manufacturer of access platforms, as an electronic supplier for their next generation of self-propelled crawler aerial working platforms.

Imer’s crawler aerial working platform uses CANopen (Photo: TTControl)

The IM R13, IM R15, as well as IM R19 platforms of Imer will be equipped with EN ISO 13849 PL-d certified electronic control units by TTControl. TTControl specifically developed the applications based on the principle that Imer should be able to modify, customize and enhance them as well as bring it to larger or smaller aerial platforms, enabling a concept for future platforms.

In 2012, Imer developed a prototype of a self-propelled crawler aerial working platform and chose TTControl as an electronic supplier for their electronic safety platform. TTControl provided the HY-TTC 90, a control unit compliant with the international IEC 61508 and EN ISO 13849 standards for functional safety. This control unit meets all safety requirements of the platforms, fulfills SIL-2 and PL-d requirements, and serves as a master ECU in the platform, interfacing with the engine controller and the remote radio control. TTControl further supplied Imer with the I/O slave HY-TTC 48X, an I/O slave module connected over CANopen to the master unit.

The HY-TTC 48X is a CANopen-based, modular solution for extending the number of I/Os in mobile applications. This controller is best suited for different kinds of control tasks in a vehicle and acts as slave unit in a CAN-based network architecture. The I/O slave module is used in combination with, and controlled by, a master electronic control unit. The master control unit can be located at an entirely different place in the vehicle and communicates with the slave module via CANopen. One or more modules can be used in addition to the master control unit. This distributed architecture makes the design and assembly of different vehicle variants possible. In addition, cabling is simplified and more
economic.

Imer’s crawler aerial working platform uses CANopen (Photo: TTControl)

The I/O module is delivered with a ready-to-run software. The application has to be implemented for the master only and interfaces with the slave module via CANopen. Local current control on the PWM outputs of the HY-TTC 48X allow control loops on the slave module. The dither frequency for the valves can also be individually configured.

"With the collaboration of TTControl we have been able to realize the new electronic concept for our new self-propelled areal platform product line, satisfying the new legal requirements from EN ISO 13849 regarding electronic control units and application software," states Mr. Roberto Arioli, Technical Manager at Imer Access.

Imer Group (Italy) is a producer of construction equipment, mortar spraying and conveying machinery, plant and equipment for batching, transporting and casting concrete in-site, and earth-moving machinery and lifting equipment. Imer Access, created after the acquisition of the business unit Iteco by Imer Group in September 2009, focuses on designing and building aerial work platforms of various types: self-propelled scissor lifts, for indoor and outdoor use, self-propelled articulated boom lifts, truck mounted aerial platforms, and now also the new range of crawler access platforms.