TWO CONTROL LOGICS IN ONE DRIVE Traditionally, position control and anti- sway functionality have been used with several separate external elements, such as automation controllers. Integrating these technologies into a single drive reduces complexity and makes automation possible. The result is a faster control loop and a more cost-effective solution compared to today’s approach. ABB’s ACS880 industrial drives offer a built-in position control program for precise crane operation. In addition to the position target control in the drives, the sensorless anti-sway feature helps prevent the load from swinging. The drive continuously collects data from the motor or the load encoders that are part of a closed-loop system. It then communicates this in real time to the programmable logic controller (PLC), which receives the target position of the crane’s movement. This enables the drive to perform sequenced movements extremely accurately and precisely. Machine builders can easily program the cranes using ABB’s AC500 PLC and
Human Machine Interface (HMI), making automation more accessible. The ACS880 industrial drives also
offer a built-in drive to drive feature that connects and coordinates two or more drives in a master-follower configuration. This enables several motors to work together for load sharing, and it is ideal for drives that operate multiple motors mounted on a common drum in the crane.
SAFER OPERATIONS OF CRANE MOVEMENT Several features ensure safe operation of the EOT crane in autonomous mode. ABB’s drive-based and PLC-based TÜV-certified functional safety options help guarantee safety for people and property. Integrated safety solutions in drives include Safe Torque Off (STO) as standard, the optional safety functions modules FSPS-21, FSO-12 or -21, and the FSE-31 pulse encoder module. Together they help to eliminate the need to use hardwired safety devices with drives, increasing reliability and reducing costs. The AC500-S Safety PLC provides
additional safeguards. Its complete range of safety trigonometric functions and ability to handle floating-point data are ideal for crane applications. The AC500-S also has a separate CPU for safety functions, enabling it to remain active even when the non-safety control system is not in use. These safety options are ideal for use with fully automated cranes, as they ensure that the system remains within limits defined by the design and/ or operator. They can also be used to establish restricted safety zones, providing additional safety for employees working in the vicinity of the crane.
GREATER CONTROL FOR SMARTER CRANES Purpose-built drives with built-in precision and safety features are the key to enabling cranes to operate autonomously. As fully automated EOT process cranes become more common, these features are the key to operating the movement of loads quickly, safely, and efficiently.
Learn more about ABB’s crane control solutions at:
https://new.abb.com/drives/segments/cranes CRANES TODAY 25
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