Modes of Operation<\/h3>\n
This section details all modes of operation for the system, including<\/p>\n
Automatic\/Manual<\/p>\n
Start-up\/Shutdown<\/p>\n
Overrides<\/p>\n
Emergency Shutdown<\/p>\n
System Failure and Recovery<\/p>\n
<\/a><\/a><\/a>Functional Operation<\/h3>\nThis section divides each of the sequential functions into logical areas (determined by the process), and provide complete description of each function, including<\/p>\n
Normal Control Functions – such as normal sequencing, control, etc<\/p>\n
Interlocks – details of all interlocks within the function<\/p>\n
Alarms – lists of all associated alarms and actions for recovery<\/p>\n
<\/a><\/a>Operator Requirements<\/h3>\nThis section describes the interface between the operator and the detailed function. It is probably the most important to the user during the design phase, as it fully details all the functions to be supplied by the system in order to meet the user's requirements. It must be written clearly and concisely, so that operators and users without technical background can visualize the system to be supplied. Inputs from the user should be clearly detailed so that the operational requirements can be determined<\/p>\n
Human\/Machine Interface –\u00a0HMI<\/a><\/h3>\nThis section describes in detail all points of operation, local terminals, remote terminal, message displays, pushbutton stations, etc<\/p>\n
Where computerized interfaces are used, such as SCADA<\/a> or HMI<\/a>, a list of the screens and the proposed content should be included<\/p>\nDynamic Attributes – dynamic color changes for status<\/p>\n
Display Values – Values to be displayed on screen and resolution-\u00a0No. of decimal places<\/p>\n
Input Devices – Operator interaction devices, mouse, keyboard, touch screen, etc<\/p>\n
Alarm and Event Displays<\/p>\n
Security – Password Access<\/p>\n
<\/a><\/a><\/a>System Data<\/h3>\nAll the data gathered, generated or calculated by the system should be detailed. The detailed data should include<\/p>\n
Type<\/p>\n
Range<\/p>\n
Accuracy\/Resolution<\/p>\n
Scaling<\/p>\n
All the data to be stored should be detailed. This includes historical trend data, alarms and events, taking into consideration the following<\/p>\n
Location of data to be stored – fixed disk, floppy disk, etc<\/p>\n
Retention period – length of time for the data to be maintained<\/p>\n
Data Archive – procedures for backup to removable medium<\/p>\n
Data Export – export facilities to other formats, such as Excel, Access, Lotus, etc<\/p>\n
System interfaces<\/h3>\n
This section provides complete details of all inputs and outputs from the control system. When separate I\/O schedules are generated, these documents must be referenced in the FDS, or else, the complete schedules must be included in the FDS appendix<\/p>\n
For digital and analog I\/O, this section should provide details of voltage, current, etc., being specific where interfacing to 3rd party equipment. The signal states should be included as follows<\/p>\n
Digital inputs – two states<\/p>\n
False or Off<\/p>\n
True or On<\/p>\n
Analog inputs – detailed range<\/p>\n
Detailed communication interfaces between systems should include protocols and formats, and also provide complete details of data to be transferred, paying special attention to 3rd party devices<\/p>\n
\u00a0This article was written by Iian Shaya, validation,automation and control expert<\/p>\n
This section describes the interface between the operator and the detailed function. It is probably the most important to the user during the design phase, as it fully details all the functions to be supplied by the system in order to meet the user's requirements. It must be written clearly and concisely, so that operators and users without technical background can visualize the system to be supplied. Inputs from the user should be clearly detailed so that the operational requirements can be determined<\/p>\n
Human\/Machine Interface –\u00a0HMI<\/a><\/h3>\nThis section describes in detail all points of operation, local terminals, remote terminal, message displays, pushbutton stations, etc<\/p>\n
Where computerized interfaces are used, such as SCADA<\/a> or HMI<\/a>, a list of the screens and the proposed content should be included<\/p>\nDynamic Attributes – dynamic color changes for status<\/p>\n
Display Values – Values to be displayed on screen and resolution-\u00a0No. of decimal places<\/p>\n
Input Devices – Operator interaction devices, mouse, keyboard, touch screen, etc<\/p>\n
Alarm and Event Displays<\/p>\n
Security – Password Access<\/p>\n
<\/a><\/a><\/a>System Data<\/h3>\nAll the data gathered, generated or calculated by the system should be detailed. The detailed data should include<\/p>\n
Type<\/p>\n
Range<\/p>\n
Accuracy\/Resolution<\/p>\n
Scaling<\/p>\n
All the data to be stored should be detailed. This includes historical trend data, alarms and events, taking into consideration the following<\/p>\n
Location of data to be stored – fixed disk, floppy disk, etc<\/p>\n
Retention period – length of time for the data to be maintained<\/p>\n
Data Archive – procedures for backup to removable medium<\/p>\n
Data Export – export facilities to other formats, such as Excel, Access, Lotus, etc<\/p>\n
System interfaces<\/h3>\n
This section provides complete details of all inputs and outputs from the control system. When separate I\/O schedules are generated, these documents must be referenced in the FDS, or else, the complete schedules must be included in the FDS appendix<\/p>\n
For digital and analog I\/O, this section should provide details of voltage, current, etc., being specific where interfacing to 3rd party equipment. The signal states should be included as follows<\/p>\n
Digital inputs – two states<\/p>\n
False or Off<\/p>\n
True or On<\/p>\n
Analog inputs – detailed range<\/p>\n
Detailed communication interfaces between systems should include protocols and formats, and also provide complete details of data to be transferred, paying special attention to 3rd party devices<\/p>\n
\u00a0This article was written by Iian Shaya, validation,automation and control expert<\/p>\n
Dynamic Attributes – dynamic color changes for status<\/p>\n
Display Values – Values to be displayed on screen and resolution-\u00a0No. of decimal places<\/p>\n
Input Devices – Operator interaction devices, mouse, keyboard, touch screen, etc<\/p>\n
Alarm and Event Displays<\/p>\n
Security – Password Access<\/p>\n
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<\/a><\/p>\n