Method and control assembly for operating at least two lifting devices, in particular cranes, in parallel

摘要

A method and control assembly are provided for operating at least two lifting devices, such as cranes, in group and normal operation modes. Each lifting device has a control system connected to a control switch, and the lifting devices are controlled through a common bus. In group operation, the lifting devices are jointly controlled through the bus by one switch. To operate at least two lifting devices in parallel, one of the switches is active in the group operation and the remaining switch or switches are passive. To prepare for group operation, normal operation is deselected by all but one of the control switches to release a remaining switch for log-in to the active state for group operation. To prepare for normal operation, group operation is deselected and normal operation is selected at the active switch before the other switch or switches are released for logging into normal operation.

主权项

1. A method for operating at least two lifting devices, in particular cranes, in group operation and in normal operation modes, said method comprising:
controlling the at least two lifting devices through a common bus, wherein each of the lifting devices comprises a respective electric lifting gear motor with a respective control system that is connected to a respective control switch, wherein the control switches are selectable between normal operation and group operation; preparing for changing from normal operation to group operation by deselecting normal operation at all but a first of the control switches that are in a normal operation, whereby only the first control switch remains in normal operation; logging on to group operation with the first control switch, thereby changing the first control switch to an active state for group operation, wherein the other control switch or switches that are deselected from normal operation are in a passive state in group operation; jointly controlling the at least two lifting devices though the common bus with the first control switch; preparing for changing from group operation to normal operation by deselecting group operation and selecting normal operation at the first control switch; and logging on to normal operation with the other control switch or switches.