摘要:
A system and method for managing a plurality of devices is provided. The system includes a user interface for controlling a plurality of devices configured as a network. The plurality of devices have corresponding device drivers to configure each of the plurality of devices to allow queuing operations to be performed in connection with the plurality of devices. The user interface is configured to communicate with the plurality of devices to identify and control jobs in a queue relating to each of the devices. The system also includes a monitoring system for monitoring the plurality of devices. The monitoring system is configured to provide notification to the user interface when a predetermined queue limit for at least one of the plurality of devices is exceeded.
摘要:
An automation control module (ACM) includes an ACM central processing unit (CPU) and a file transfer system electrically connected to the ACM CPU. The file transfer system is embedded within the ACM, and is configured to receive at least one update for at least one module from a network and transfer the at least one update to the at least one module.
摘要:
A method for configuring a programmable logic controller (PLC) having a protocol is provided. The method includes providing an extensible markup language (XML) schema for the protocol of the PLC. In another aspect, a method for configuring a programmable logic controller (PLC) having a protocol includes utilizing the schema to validate at least one XML file parsed from a comma separated variable (CSV) file created by a configuration tool for a protocol different than the protocol of the PLC. In another aspect, a method for configuring a programmable logic controller (PLC) having a protocol includes utilizing the schema to validate at least one XML file parsed from a comma separated variable (CSV) file created by a configuration tool.
摘要:
A memory module for a computer-based system. The memory module includes at least one memory device that requires periodic refresh signals to maintain data and is mounted on the memory module, and a circuit mounted on the memory module and configured to retain data stored on the memory device when the computer-based system loses power. In a separate embodiment, a control circuit is configured to logically detach at least one memory device from at least one memory controller when a computer-based system loses power, and retain data stored on the memory device when the computer-based system loses power.
摘要:
A programmable logic controller is provided in which I/O modules situated in respective slots are coupled to a CPU by a main bus including a serial data line. A dedicated slot enable line is provided from the CPU interrupt controller to each slot into which an I/O module may be positioned. In this manner, the CPU can enable a selected I/O module when desired. The I/O module includes an interrupt feature wherein an interrupt signal is provided to the same slot enable line which communicates a slot enable signal to the I/O module. The I/O module returns an interrupt on the slot enable line at times other than when the slot enable line is being used by the CPU interrupt controller to send a slot enable signal. The CPU interrupt controller includes an interrupt detection circuit which makes a determination of when two conditions simultaneously occur, namely when both a particular slot enable line is active and the CPU is not enabling the corresponding slot with the slot enable signal. The simultaneous occurrence of these conditions indicates that an interrupt is being received from the I/O module coupled to that slot enable line. By employing this apparatus and technique, the slot enable lines are shared by the CPU which uses the slot enable line to enable an I/O module and by the I/O module which uses the same slot enable line to communicate an interrupt to the CPU.
摘要:
An apparatus and method are provided for preventing the runaway of the integral term of a proportional integral differential controller which is usable in a feedback system. An error signal is supplied to the controller by the feedback system. The controller produces a control variable output signal from the error signal. In accordance with the invention, the controller imposes a slew rate limit on the control variable output signal. Also in accordance with the invention, whenever the controller attempts to drive the control variable output signal to exceed the slew rate limit, the integral term associated with the controller is adjusted to a value which forces the control variable output signal to its slew rate limited value. In this manner, runaway of the integral term associated with the controller is desirably avoided.
摘要:
A reconfigurable counter is provided which includes first and second memories coupled via a common bus to a microprocessor which controls the process of configuring and reconfiguring the counter. A programmable hardware array, coupled to the microprocessor, is capable of being programmed to emulate a plurality of different counter types. The first memory stores a plurality of different counter configuration profiles, each of which corresponds to a different type counter configuraiton. In one or more of the selected counter types, different counter modes such as an up-down counter mode, pulse direction counter mode and A quad B counter modes are available. When the user indicates a selected counter profile to the microprocessor, the microprocessor writes the corresponding counter configuration profile from the first memory into the programmable hardware array using the parameters or modes of operation stored in the second memory until such time as the user indicates the choice of another counter profile to the microprocessor.
摘要:
A method is provided for configuring a smart module which is coupled to a programmable logic controller. The controller includes an initial configuration file which specifies an initial configuration for the smart module. After power up and initialization of the controller, the initial configuration file is transmitted from the controller to the smart module. The initial configuration file is now designated a current configuration file and the smart module assumes the configuration specified by the current configuration file. In accordance with the method of the invention, module specific information which is stored in the module is then displayed to aid a user in configuring the module. The user can then modify the current configuration file in response to the module specific information which was displayed. This method significantly simplifies the process of configuring smart modules for the user.
摘要:
A power monitor, for determining real and imaginary power associated with one or more line signals, samples a plurality of line cycles during an observation window to generate a plurality of voltage-current sample sets for each line cycle. The sampling of the sample sets is timed such that the voltage-current sample sets are taken at different relative time positions. The power monitor stores incoming voltage-current sample data in one memory area and concurrently analyzes sample data already stored in another memory area. Deletion of sample data is not permitted until transient analysis of such data is complete.In another embodiment, the power monitor includes a working data memory area coupled to the sampling circuitry such that the sample sets occurring during each observation window are stored in the working data memory area in interleaved fashion to simulate a single cycle of data. This power monitor further includes a transient data area, coupled to the sampling circuitry, for storing the sample sets occurring during an observation window in a non-interleaved or sequential fashion. Power analysis is conducted on the sample sets in the working data memory area unless a power transient is sensed. Upon sensing a transient, data from the transient data area is provided for analysis.
摘要:
A web-enabled automation control module (ACM) system includes at least one network module configured to receive a request for a file from the network, a web server and database module located outside the network module and including a database configured to store the file, and an ACM central processing unit (CPU) configured to send ACM data to the web server and database module to embed ACM data in the file.