CONTROL AND MONITORING SYSTEM

• US 20090309721A1
• Filed: 06/04/2009
• Published: 12/17/2009
• Est. Priority Date: 06/17/2008
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: KITAHARA, Hideki
• Granted Patent: US 8,280,534 B2
• Time in Patent Office: Days
• US Class Current: 340/540
• CPC Class Codes: G05B 23/0272 Presentation of monitored results, e.g. selection of status reports to be displayed; Filtering information to the user
• CPC Class Codes: G08B 21/02 Alarms for ensuring the safety of persons

Abstract

When a system operator selects a message to be analyzed from among a plurality of messages listed in a state change list displayed on an HMI unit, a monitoring target is identified from the selected message and all other messages that correspond to the same monitoring target are automatically searched. Subsequently, a timeline chart is displayed that represents changes in the operating state specified in the selected message and the found messages.

Claims

1. A control and monitoring system comprising:

a processing unit that obtains an operating state signal from at least one monitoring target, detects a change in operating state of the monitoring target based on the operating state signal, creates a state change list in which the change in operating state of the at monitoring target is listed in form of a text message including at least one of identification information for identifying the monitoring target and date-time information about date and time at which the change in operating state occurred in the monitoring target, as well as operating state information, and outputs a control signal to the monitoring target according to detected change in operating state; and

a human machine interface unit that includes an operation facility and a display unit that displays thereon the state change list, wherein

when a message is selected from the state change list displayed on the display unit, the processing unit searches the state change list for a message that includes identification information identical to identification information included in selected message, and displays a chart page that includes a timeline chart representing a temporal sequence of changes in operating state of the monitoring target identified in the selected message based on the selected message and searched message.

2. The control and monitoring system according to claim 1, wherein

the selected message includes a plurality of messages selected from the state change list displayed on the display unit, and

the processing unit displays a chart page that includes a plurality of timeline charts representing temporal sequences of changes in operating state of a plurality of monitoring targets identified in the selected messages, respectively.

3. The control and monitoring system according to claim 1, wherein the processing unit sets, from among pieces of date-time information corresponding to the selected message, earliest date and time at one of first end, second end, and center of a time axis in the chart page.

4. The control and monitoring system according to claim 2, wherein the processing unit sets, from among pieces of date-time information corresponding to the selected message, earliest date and time at one of first end, second end, and center of a time axis in the chart page.

5. The control and monitoring system according to claim 1, wherein the chart page includes a first scrollbar for changing a range of display time.

6. The control and monitoring system according to claim 2, wherein the chart page includes a first scrollbar for changing a range of display time.

7. The control and monitoring system according to claim 3, wherein the chart page includes a first scrollbar for changing a range of display time.

8. The control and monitoring system according to claim 4, wherein the chart page includes a first scrollbar for changing a range of display time.

9. The control and monitoring system according to claim 5, wherein the chart page includes a second scrollbar for changing display magnification of the time axis.

10. The control and monitoring system according to claim 6, wherein the chart page includes a second scrollbar for changing display magnification of the time axis.

11. The control and monitoring system according to claim 7, wherein the chart page includes a second scrollbar for changing display magnification of the time axis.

12. The control and monitoring system according to claim 8, wherein the chart page includes a second scrollbar for changing display magnification of the time axis.