Supporting Key Console Operator Interactions ... - ASM Consortium

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StatusAlarmViewSummaryType 1Ops. ViewOps. ViewOps. ViewOps. ViewType 2Type 3Type 2Type 3ControlNoteLogSpecsConfigureSpecsConfigureFigure 1: NOVA Chemicals’ ASM Style InterfaceThe Operations View is comprised of four levels of displays with two fixed trends as shown inmore detail in Figure 2. The Type 2 display (upper left) provides a high-level view of anindividual process unit. The Type 3 display shows a portion of that unit in higher detail. Belowthe Type 3 display is a region used to provide detailed control loop information and a trendobject. Below the Type 2 display there is another trend plus a detail view showing the selectedpoint.Figure 2: NOVA Chemicals’ ASM Style Operator ViewKey features of the Operations View include• On-screen navigation via display tabs with integrated alarm information• Restricted use of colour, reserving colour to highlight off normal conditions• Windows management minimizing display overlays• Automated display invocation through pre-configured display associations (i.e.,assisted, task-relevant navigation)• Access to online information• Integration of trend information
The ASM style is intended to provide a continuous broad overview of process conditions whilesimultaneously giving access to the needed detail information to reduce the potential for “tunnelvisioning” when operators are solving complex process problems.Interaction Requirements“The design of an operator interface that enables efficient and effective job performance requiresthe anticipation of the operators’ needs in understanding the plant’s process interactions, theirinteractions with computers and with other individuals in the workplace.” 5 Often an operatorinterface is described as merely presenting information to people however this description isabout a one-way communication flow. The operator is an active and integral element to goodplant performance and their working with the operator interface is a two-way process. A welldesigned operator interface will provide for not only an effective display of process informationbut will also meet the operator’s interaction needs that are critical to job performance.Aspects of the NOVA ASM style interface explicitly addressed the interaction requirements ofthe console operator in working with the control system. The key element of this portion of thedesign was the integration of trend information, the use of context sensitive menus and thedevelopment of the detail display.Figure 3 shows a picture of a detail view in the NOVA ASM style of interface for a regulatorycontroller. Its key features with respect to meeting operator interaction requirements are itemssuch as:• highlighted dialog boxes• highlighted operator entry points (white background)• control valve status message box (STSMSG)• instrument maintenance status (REDTAG)• alarm limits displayed with philosophy matching highlights• access to the setpoint target value (SPTV) and ramp controls (RAMPTIME, TVPROC)• access to an alarm acknowledge button and alarm summary controls• access to group trend control menu (TrendControl)• off-normal indicators (magenta)• ramp boxes (displayed on selection of setpoint or output)5 Bullemer, P., Reising D.V., Hajdukiewicz, J., Errington, J, Interaction Requirements Methods for EffectiveOperator Interfaces, Abnormal Situation Management Consortium internal publication, (2004)
Page 1 and 2: Paper TA006DSupporting Key Console
Page 3 and 4: IntroductionIn 1996, NOVA Chemicals
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Supporting Key Console Operator Interactions ... - ASM Consortium

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