Abstract: One or more Variable Frequency Drives (VFD) are connected to a packet network and the power transistor drive signals normally generated by the VFD to produce a desired Pulse Width Modulated (PWM) motor drive signal are generated by a software controller located in the packet network and transmitted to the VFD. The control of the VFDs can be (1) centralized using some centralized software controller communicating to the VFDs over the packet network, and/or (2) distributed, in which case VFDs can peer with each other over the packet network, to communicate control state.

Abstract: One or more Variable Frequency Drives (VFD) are connected to a packet network and the power transistor drive signals normally generated by the VFD to produce a desired Pulse Width Modulated (PWM) motor drive signal are generated by a software controller located in the packet network and transmitted to the VFD. The control of the VFDs can be (1) centralized using some centralized software controller communicating to the VFDs over the packet network, and/or (2) distributed, in which case VFDs can peer with each other over the packet network, to communicate control state.

Abstract: A compact tool (100) for network radios implementing bi-directional data communication links in computer networks. The tool is formed of a compact chassis or body (101) that can be conveniently stored in a user's pocket. A control processor (502) contained within the chassis is coupled to a data network communications module (506), including an integrated connector (616). The control processor (502) and data network communications module is configured exclusively for communicating with the network radio. Such interface communications are performed using Simple Network Management Protocol (SNMP) and/or telnet protocols. Using these communication protocols, the tool (100) can access radio operating data stored or generated by the network radio. The operating data is displayed using a simple integrated display device (514, 614).

Abstract: A compact tool (100) for network radios implementing bidirectional data communication links in computer networks. The tool is formed of a compact chassis or body (101) that can be conveniently stored in a user's pocket. A control processor (502) contained within the chassis is coupled to a data network communications module (506), including an integrated connector (616). The control processor (502) and data network communications module is configured exclusively for communicating with the network radio. Such interface communications are performed using Simple Network Management Protocol (SNMP) and/or telnet protocols. Using these communication protocols, the tool (100) can access radio operating data stored or generated by the network radio. The operating data is displayed using a simple integrated display device (514, 614).