Protocol Driver Sheet - WebServer/LanServer
Contents
1. and other essential data which may be lost if a Sentry s Backup Resto Download to FieldServer firmware is replaced Can also be used to restore the re Control Ready Sentry Page 5 of 6 www sierramonitor com sierra monitor FieldServer Protocol Driver Sheet WebServer LanServer Version 5 14 Rev 1 10 WEB DRIVER DESIGN ISSUES AND LIMITATIONS 10 1 Read Request Issues 10 1 1 lt FST_ DISPLAY gt tags Custom Web page templates use lt FST_DISPLAY gt tags These tags provide placeholders for data values referenced by other parameters eg Data Array Name and Offset The Web Driver dynamically selects the template to respond to the Web Client It reads one line from the selected template searches for the display tag inserts the data and sends the data to the Client Each page is served line by line to the current Client before attention is given to the next Client In situations where there are a large number of tags on a page or multiple pending requests the FieldServer s performance would be adversely affected either because of memory limitations or availabliity of latest data 10 1 2 lt iframe gt tags Standard lt iframe gt tags are used to refresh part of a page at regular intervals e g the data value part of the page can be updated while the data description remains unchanged Each lt iframe gt section sends a request to the FieldServer for the latest value Where there is a large numb2. activate the Web Driver 6 SERVING ACTIVEX CONTROL OCS FILES Each ActiveX control is contained in a file with the extension OCX OCX files can be served by the LANServer Driver in the same way as web file images and components Note the following e OCX file sizes can range from 40k up to several hundred kilobytes Downloading takes time e OCX files need to be registered on the browsing computer initially but need not be downloaded every time a page is refreshed 6 1 Serving Data to ActiveX Controls The driver called SMT a FieldServer Ethernet driver is used to serve data in response to polls from the ActiveX Controls 6 2 IP Address Substitution When ActiveX controls are configured the IP address of the FieldServer that the ActiveX control must communicate with is specified IP address substitution allows the LANServer to modify the html file served to the browser and replace the configured address with its own This is useful if a web project has been created to connect to and obtain data from a FieldServer with a particular IP address and it becomes necessary to transfer the project to another LANServer with a different address Substitution is ON by default The following limitations to address substitution apply e If a project has been built with Activex controls configured to obtain data from more than one LANServer then address Page 1 of 6 www sierramonitor com J FieldServer Protocol Dr
3. no recent data has been received Subject to Cookie Limitations Displays text based on the binary state of Data Array Text Display value in the FieldServer Thus an on and off text string Controls and colors must be defined Subject to Cookie Limitations Recess eda Provides a method of restricting access to the web Control pages After a time all pages change to this one The control is provided as part of the Advanced Feature Pack which must be ordered in addition to part 8706 01 Page 3 of 6 www sierramonitor com sierra monitor FieldServer Protocol Driver Sheet WebServer LanServer Version 5 14 Rev 1 Display Sentry Oriented Active X Controls Sentry Zone Button Controls Sentry Sensor Status Controls Sentry Combo Status Controls Alarm Page Control Alarm Reset Button Control Event Page Control The color of the button changes according to the state of the points being monitored Can monitor all some sensors on one or more Sentry s Subject to Cookie Limitations The color or the sensor changes according to the state of the particular sensor on one Sentry Sensor name gas concentration and units are also displayed Subject to Cookie Limitations Similar to the Sentry Sensor control but display configurable including alarm levels Subject to Cookie Limitations Provides a dynamic list of current Sentry Alarms Alarm states are highlighted in diffe
4. er of lt iframe gt tags increases per page or the number of clients currently accessing this page is high the FieldServer s performance is affected Performance could be increased by sorting all refreshable data under one lt iframe gt but that would force all the data to get refreshed at same interval and would restrict the web page developer to display all data at one place ona page 10 2 Write Request issues Each point requires a different section on a page to send a write request for a single point otherwise all other points on a page will be over written at the FieldServer Data integrity would be in danger lt is possible that a page could be refreshed while in the process of being edited If the refresh occurs before a write request is sent the information typed by the user will be lost This drives a Web Page developer to develop two templates one refreshable page where set points can be viewed and another Static page where points are set 11 WEB DRIVER STATISTICS Web Driver statisitics can be revealed by configuring a HI TP Stats Data Array Refer to the User Manual for more information Page 6 of 6 Sierra Monitor Corporation 1991 Tarob Court Milpitas California 95305 USA O 1 408 262 6611 TF 1 800 72 SIERRA 74377 F 1 408 262 9042 wwwssierramonitor com
5. ing Systems e Microsoft Windows 2000 Professional Windows XP Windows Vista e Microsoft Windows CE 3 0 The following statements apply irrespective of the operating system of the browsing computer Page 2 of 6 www sierramonitor com monitor WebServer LanServer Sm S FieldServer Protocol Driver Sheet Version 5 14 Rev 1 9 WEB CONTROLS Display Available Web Controls The Analog ActiveX displays the value of a data array element in a FieldServer With appropriate permission a user may interact with the control to have the control change the value of the data array element in the FieldServer Analog Value l The foreground and background colors are Display configurable Controls The control listens passively for messages sent by a FieldServer The control reports its comm status by changing to grey and displaying if no recent data has been received Subject to Cookie Limitations Displays an image file based on the binary state of Data Array value in the FieldServer Thus an on and off file must be defined With appropriate permission a user may interact with the control to have the control change the value of the data array element in the FieldServer The on and off color are configurable The background color is configurable The control listens passively for messages sent by a FieldServer The control reports its comm status by changing to grey if
6. iver Sheet Gi Gea WebServer LanServer Version 5 14 Rev 1 substitution is not suitable and must be 8 2 2 Supported ActiveX Containers disabled e Microsoft Internet Explorer version 6 0 e f the web project is being served from a Server other than the FieldServer LANServer then address substitution will not work 8 2 3 Controls limitations e Substitution only operates on html files Maximum number of controls running on one PC 7 SYSTEM LIMITATIONS Maximum number of any single control running on one PC The FieldServer LANServer does not support Maximum number of Containers FrontPage extensions Active Server Pages ASP or running on one PG scripting tools e g PERL There is a limited amount of space on a FieldServer on which to store the web project elements screens etc running containers connected to one FieldServer 7 1 Cookie Length 800x600 If the cookie length exceeds the maximum limit of 3500 bytes the screens will not update correctly 7 2 Total number of controls in a project The total number of controls permitted in one project is limited to 200 8 BROWSER SECURITY SETTINGS 8 1 ActiveX Controls and Security The security profile for the browser will be low The browser and user must accept unsigned objects 8 2 Limitations and Supported Operating Systems Specific compatibility notes are provided in the chapters that describe each control 8 2 1 Supported Operat
7. rent colors Subject to Cookie Limitations A button that when pushed sends an alarm acknowledgement to all Sentry s connected to the FieldServer Button text is configurable Subject to Cookie Limitations Provides a dynamic list of Sentry Events Alarms warnings etc Subject to Cookie Limitations Page 4 of 6 www sierramonitor com sierra monitor WebServer LanServer S Mm FieldServer Protocol Driver Sheet Version 5 14 Rev 1 Display Sentry Oriented Active X Control OCX Controls Event A button that when pushed uploads the events dat file Uploader Upload from the FieldServer and saves it and a comma Control separated version suitable for MS Excel on a PC This application is not suitable for inclusion in a web project It performs the same function as the Event Uploader control except that it is presented as a stand alone application It can be used to convert an events dat file located on a PC to a comma Separated file suitable for use with Excel Event Uploader Application CALIBRATE SENSOR LEVEL OR CHANGE POWER B TROUBLE Provides a Sentry Faceplate which displays current sentry information and allows a user to interact with the Sentry Sentry Faceplate SENSOR ALARMS FLASHFHIGH SOL ID LOW TEST MODE T J RESET TIME ENTER Sierra Monitor Corporation Milpitas CA 95035 Sentry Provides a method of uploading to a PC calibration Upload from FieldServer l l i Calibration
8. sierra monitor FieldServer Protocol Driver Sheet WebServer LanServer 1 DESCRIPTION This Driver is capable of e Serving files to a HTTP client such as Internet Explorer e Responding to HTTP Get Post commands 2 FORMAL DRIVER TYPE Ethernet Server Only 3 COMPATIBILITY MATRIX Compatible with No No S ProtoCessor FPC ED2 No ProtoCessorFPC ED4 No 4 CONNECTION INFORMATION QuickServer FS QS 12xx Y Connection type Ethernet Ethernet Speeds Supported 10Base T 100Base T 5 SERVING WEB PAGES The FieldServer can be configured to provide HTTP services and hence is able to serve Web Pages graphic files and almost all other files embedded in web pages Typically these files have extensions htm jpg gif bmp The FieldServer supports DOS 8 3 file name format but not the file name formats of newer operating systems where files can have very long names which include spaces and punctuation To configure the FieldServer to serve Web Pages Not all FieldServer models support 100BaseT Consult the appropriate instruction manual for details of the Ethernet speed supported by specific hardware Version 5 14 Rev 1 e Ensure that the FieldServer s firmware contains the Web Driver HTTP driver e The pages and files to be served must be downloaded onto the FieldServer s flash disk e The FieldServer s configuration file config csv must be programmed to
Download Pdf Manuals
Related Search