Abstract:
Disclosed are a communication device and a method of a communication device that includes processing by the controller a first scan for shared drives and folders on a wide local area network in accordance with a CIFS Protocol and then processing a second scan for shared drives and folders of a local wide area network in accordance with an Address Resolution Protocol. An Address Resolution Protocol (ARP) is a computer network host's link layer or hardware address when only it's Internet Layer (IP) or Network Layer address is known. An ARP port scan is a low level request and answer protocol that uses a simple message format that contains one address resolution request or response. IP addresses are the result of an ARP port scan. In this way, user can be provided with the opportunity to connect to all available local servers.
Abstract:
A control system for a super-lifting device of a crane comprises a pressure-detecting element (21) for detecting the pressure of a variable amplitude oil cylinder and obtaining a measured pressure value, and a control element (22) for comparing the measured pressure value with the predetermined pressure value. When the measured pressure value is larger than or equal to the predetermined pressure value, the tensioning oil cylinder (23) is shortened, therefore increasing the tensioning pressure of the tensioning oil cylinder (23), reinforcing the tension of the super-lifting cable wire in the super-lifting device, and increasing the super-lifting moment applied to the main arm by the super-lifting device, which can effectively balance the pressure of the variable amplitude oil cylinder. A control method and a super-lifting device with the above control system are disclosed.