Abstract: Aspects of the invention provide apparatuses, systems, and computer readable media for supporting redundant network management. When the primary device (101, 103) fails, its Ethernet IP address is transferred or controlled by a backup Ethernet device. System information is provided to a network adapter so that programmable logic controllers are in agreement about the mode of operation. A central processing unit (201, 203) determines a calculated mode of operation from the operational statuses of the programmable logic controller and the mated programmable logic controller. The central processing unit provides an address indication (503) based on the calculated mode of operation and a selection indication (501) that is indicative of a selected address criterion. The corresponding network adapter determines the assigned network address from the selection indication and the address indication.

Abstract: Aspects of the invention provide apparatuses, systems, and methods for supporting cable redundancy in a network connecting a network controller (101) and an I/O device (109) (an adapter). An adapter includes a first port (407) and a second port (409) for receiving the same messages from a scanner (301) over a first and second transmission media (353, 355), respectively. A connection manager module (423) instructs a switching module (419) to direct the output data contained in the first message to a data structure (421) when the first transmission medium is operational and to direct the output data contained in the second message to the data structure when the first transmission medium is non-operational. Also, the adapter formats a message from input data.

Abstract: A modular distributed I/O system that allows one or more modules of an island to be omitted without requiring reconfiguration of the system and a method for auto-addressing the system. The island includes a network interface module that is operably connected to a user interface. The user interface allows a user to indicate for each of the nodes of the island whether the node has an I/O module physically present or not physically present. This allows a constant process image in a system where the process image is dependent upon node ID's of modules, and modules are assigned addresses (i.e., ID's) automatically without using unique markers or signatures.

Abstract: The invention described herein provides a system and method for fault isolation and auto-recovery in chained loop or ring networking systems (103). According to aspects of the method and the associated path-selection algorithms described, fault isolation and auto-recovery operations can be handled locally on each node on a loop and the overall fault recovery time under a link failure condition can be minimized. In addition, the method allows for auto-recovery operations that are transparent to the rest of network and to remote hosts.

Abstract: Aspects of the invention provide apparatuses, systems, and computer readable media for protecting a programmable logic controller (PLC) 201 and plant network 203 against unauthorized access and for providing robust intended communication. A communication module 211 provides only intended communication and blocks all unintended communication between the plant network and a control network/office network 205 without using external infrastructure network devices. The communication module includes an Ethernet switch 303 and ports that electrically couple the CPU module 209, a plant network, and control/office network and controls communication to the PLC and the plant network from the control/office network by forwarding packets based on configuration information 406 and 504, where the packets are received through the ports. The communication module passes packets only when the associated source address and destination address are in accordance with the configuration information.

Abstract: Aspects of the invention support a component configuration mechanism when rebooting a circuit module (201) of a programmable logic controller (101). A component (application) may be configured from a plurality of sources, including flash memory (204) and a web-based configuration source. The configuration mechanism avoids using invalid configuration data when replacing the communication module. The circuit module may support a plurality of components, where some of the components may be associated with a web-based configuration while other components may be associated with a CPU-based configuration. If the configuration data in the flash memory of the communication module is determined to be invalid, the communication module obtains configuration data from a web-based configuration source for a web-based configured component and from an associated CPU module (202) for a CPU-based configured component.

Abstract: Aspects of the invention provide apparatuses, systems, and computer readable media for supporting redundant network management. When the primary device (101, 103) fails, its Ethernet IP address is transferred or controlled by a backup Ethernet device. System information is provided to a network adapter so that programmable logic controllers are in agreement about the mode of operation. A central processing unit (201, 203) determines a calculated mode of operation from the operational statuses of the programmable logic controller and the mated programmable logic controller. The central processing unit provides an address indication (503) based on the calculated mode of operation and a selection indication (501) that is indicative of a selected address criterion. The corresponding network adapter determines the assigned network address from the selection indication and the address indication.

Abstract: Aspects of the invention provide apparatuses, systems, and computer readable media for providing security to an end device (209) by a security device (205). The security device is typically installed in front of the end device. The combination of the end device and the security device appear as a single secure end device from the network having a network address of the original end device. The security device may include a first communications port (405) that receives a message designated for an end device, a second communications port (407) that connects directly to the end device, and a processor (401) that is connected to the first and second communications ports. The processor is configured to determine whether to pass the message to the end device based on at least one security consideration and to provide at least one service that is not originally supported on the end device.

Abstract: A method and interface module for communicating messages with a remote location and to provide access to an at least one intelligent electronic device (IED) operably connected to a communication network. The interface module is comprised of a central processing unit and an operating system operating the central processing unit. A network interface is operably connected with the communication network. A protocol task processes communication on the network according to first and second protocol stacks, wherein messages are assigned to either the first or second protocol stack. Messages assigned to the first protocol stack have a higher priority than messages assigned to the second protocol stack. A set of application tasks communicates with the protocol task for responding to an incoming message from the communication network and initiating an outgoing message to the communication network. An interconnection bus with an interface driver is operably connected with the at least one IED.

Abstract: A method and apparatus for detecting a wafer-level arc in a plasma process chamber. The method includes, for example, monitoring a waveform of a signal supplied to the plasma process chamber; detecting a feature in the waveform; responsive to detecting the feature, determining whether the waveform has stabilized after the feature; responsive to the waveform stabilizing, determining whether the feature is part of a bidirectional waveform anomaly or a unidirectional waveform transition; and recording to a computer-readable medium either an indication of the feature being part of a bidirectional waveform anomaly or an indication of the feature being a unidirectional waveform transition.

Abstract: A gateway having an input/output scanner is disclosed. The gateway includes a local area network interface, a serial interface, and a processor configured to provide protocol conversion between the local area network interface and the serial interface. Further, an input/output scanner module is operatively connected to the serial interface and configured to poll the slave device.

Abstract: A modular distributed I/O system for an industrial automation network that allows one or more modules of an island to be omitted without requiring reconfiguration of the system by maintaining a consistent I/O image representation of the distributed I/O network for various physical distributed I/O configurations and managing reconfiguration changes remotely using Virtual Placeholder objects.

Abstract: A communications adapter is provided for interfacing between a master device and an I/O device (body) having an output and/or an input. In the case of the I/O body having an output, the adapter has a TCP port for coupling to the master device via a transmission path for receiving a request message. The adapter also has a connector for operable coupling to the I/O device for receiving the output of the I/O device. The adapter further has an interface circuit operably connected to the TCP port and the connector for transmitting a response message over the transmission path in response to the request message, the response message correlating to the output received from the I/O device. The request message and the response message is limited to a length that is less than a TCP transaction length and/or a maximum transmission unit limit, or both, depending on the embodiment of the present invention.

Abstract: Each device in an industrial automation system network or other network may have its own associated one or more performance characteristics, such as response time and/or reset time of the network device. Data may be stored representing a plurality of performance characteristics each associated with a different one of a plurality of devices in the network including a first device and a second device. The stored data may be retrieved, representing the performance characteristic of the second device. The first device may communicate over the network with the second device in accordance with the performance characteristic of the second device.

Abstract: Aspects of the invention provide apparatuses, systems, and methods for supporting cable redundancy in a network connecting a network controller (101) and an I/O device (109) (an adapter). An adapter includes a first port (407) and a second port (409) for receiving the same messages from a scanner (301) over a first and second transmission media (353, 355), respectively. A connection manager module (423) instructs a switching module (419) to direct the output data contained in the first message to a data structure (421) when the first transmission medium is operational and to direct the output data contained in the second message to the data structure when the first transmission medium is non-operational. Also, the adapter formats a message from input data.

Abstract: The invention described herein provides a system and method for distributing and applying a configuration file from a master device (102) to a slave device (104) in a distributed control system (100). According to aspects of the invention, a configuration file is saved at a master device (102) and distributed to the slave device (104) via the data payload of a fieldbus protocol, such as the CANopen protocol. Aspects of the present invention may be used to further configure an I/O island or sub-network (108) that is attached to the slave device (104). Further aspects of the present invention may be used to repair or replace failed devices in a distributed control system (100).

Abstract: The invention described herein provides a system and method for fault isolation and auto-recovery in chained loop or ring networking systems (103). According to aspects of the method and the associated path-selection algorithms described, fault isolation and auto-recovery operations can be handled locally on each node on a loop and the overall fault recovery time under a link failure condition can be minimized. In addition, the method allows for auto-recovery operations that are transparent to the rest of network and to remote hosts.

Abstract: A system and method of for obtaining a pseudorandom number generator are disclosed. A set of state modules, each with a limit value, may be provided. In an embodiment, each of the limit values may be relatively prime to the other limit values. In response to one or more events, the values of the state modules are incremented. At some frequency that may be statistically independent from the occurrence of the one or more events, the values of the state modules are obtained and combined to form a random number. The values may be combined as desired and, if desired, may be combined modulo 2w, where 2w represents the number of possible random values.

Abstract: A method and apparatus for providing an active standby control system includes the steps of providing a first and second programmable logic controller (PLC), each controller having an operating state. Each controller includes a network module board operably connected to a network; a control unit, a remote I/O head; and, a hot standby module, each hot standby module is operably connected together. PLC. This method and apparatus can be used within a control system for monitoring input devices and for controlling output devices which reside on the standard communications network such as an Ethernet network, and the standard communications protocol used therein can be TCP using Modbus.

Abstract: An integrated control system comprises one or more controllers each equipped to perform a control function and to gather data (ordinarily from sensors) relevant to the control function. The data is combined with instructions, associated with the data, for causing a remote computer to generate a visual display incorporating the data in a predetermined format. A communication module establishes contact and facilitates data interchange with the remote computer over the World Wide Web.