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A user interface is adapted to be used in a process control network having a controller communicatively coupled to a plurality of field devices, a process control configuration database and a workstation having a display, a processor and a memory communicatively coupled to the controller. The user i

A user interface is adapted to be used in a process control network having a controller communicatively coupled to a plurality of field devices, a process control configuration database and a workstation having a display, a processor and a memory communicatively coupled to the controller. The user interface includes a process control configuration system that enables a user to manipulate and view a process control solution for use in the process control network, a field device management system that enables a user to communicate with one of the field devices and an interface that passes data between the process control configuration system and the field device management system to enable simultaneous use of the process control configuration system and the field device management system.

대표청구항 ▼

A user interface is adapted to be used in a process control network having a controller communicatively coupled to a plurality of field devices, a process control configuration database and a workstation having a display, a processor and a memory communicatively coupled to the controller. The user i

A user interface is adapted to be used in a process control network having a controller communicatively coupled to a plurality of field devices, a process control configuration database and a workstation having a display, a processor and a memory communicatively coupled to the controller. The user interface includes a process control configuration system that enables a user to manipulate and view a process control solution for use in the process control network, a field device management system that enables a user to communicate with one of the field devices and an interface that passes data between the process control configuration system and the field device management system to enable simultaneous use of the process control configuration system and the field device management system. virtual connection; a cell counter per virtual connection, the cell counter coupled to the comparator and configured to count the number of non-end of the frame data cells which arrive on the virtual connection; and the comparator coupled to the register and the cell counter and configured to compare the pre-determined threshold value with the number of non-end of the frame data cells and responsively output a frame based traffic detect signal to automatically enable or disable the early packet discard. 10. The apparatus of claim 9 wherein the pre-determined threshold value is indicative of a maximum frame size. 11. The apparatus of claim 10 wherein the cell counter is configured to initialize if the cell counter detects an end of the frame data cell. 12. The apparatus of claim 11 wherein the comparator outputs an enabled frame based traffic detect signal if the data cell count value is less than the pre-determined threshold value. 13. The apparatus of claim 12 further comprising a virtual connection configuration and status information table configured to hold one entry for each virtual connection, each the entry having an early packet discard enablement bit that is programmed per virtual connection that indicates whether the early packet discard is to be disabled or enabled altogether or enabled in an auto-early packet discard mode. 14. The apparatus of claim 13 further comprising a decoder coupled to the virtual connection configuration and status information table configured to decode the early packet discard enablement bit for a given virtual connection and output a corresponding early packet discard enable signal. 15. The apparatus of claim 14 further comprising a first logic gate coupled to the comparator and configured to accept the frame based traffic detect signal and the auto early packet discard enable signal. 16. The apparatus of claim 15 wherein the first logic gate is configured to output an early packet discard on signal if the frame based traffic detect signal indicates that the data cell count value is less than the predetermined threshold value and the early packet discard enable signal is on. 17. The apparatus of claim 16 further comprising a second logic gate coupled to the first logic gate configured to accept the early packet discard on signal and a static early packet discard configuration signal, the static early packet discard configuration signal over-riding the early packet discard on signal and enabling or disabling the early packet discard according to a static early packet discard configuration indicated by the static early packet discard configuration signal. 18. A network communication system implemented with an auto early packet discard mechanism for automatically enabling and disabling early packet discard on a cell switching network comprising: a physical layer adaption controller configured to interface with a cell switching network layer and transfer data cells in and out of the network communication system; a cell queue controller coupled to the physical layer adaption controller and configured to determine whether to accept the data cells, the auto early packet discard mechanism residing in the cell queue controller and configured to automatically determine whether to enable the early packet discard according to traffic type of the data cells; a counter implemented in the cell queue controller that is incremented with every non-end of frame cell and is cleared with every end of frame cell; a cell queue memory coupled to the cell queue controller and configured to store the accepted data cells in service queues; and a call service controller coupled to the cell queue memory and the physical layer adaption controller and configured to determine which cell to send to the physical layer adaption controller. 19. The system of claim 18 comprising an asynchronous transfer mode switching unit. 20. The system of claim 19 wherein the auto-early packet discard mechanism comprises: a