User Manual - WebTransmitter
Contents
1. 2013 05 13 15 11 44 Figure 4 Display Network Information 10 Document Version Information Version Comments Firmware Author Date 1 4 Updated for current 1 E RJB 2013 05 13 version of firmware Rewritten for 1 x firmware 2011 07 29 1 2 Updated for calibration 0 1 P RJB 2009 05 21 mode and updating IP data to the database 1 1 Updated for 4 20mA 0 1 M RJB 2009 04 26 diagnostic mode Original Version 2009 03 14 WebTransmitter_UsersManual_v1_4 docx Page 7 of 72. TA mitter Instruction Manual May 13 2013 R Engineering Inc WebTransmitter User Manual 1 Introduction The Web Transmitter has been developed to copy numerical data from the Internet seamlessly into a control system as a 4 20mA signal Once in the control system such as a Programmable Logic Controller PLC Distributed Control System DCS or Basic Process Control System BPCS the data may be utilized and displayed on the Human Machine Interface HMI to provide near real time information to operations The process of coping data from the Internet is often referred to as scraping Typically data published on the Internet is copyrighted and therefore it is the users responsibility to contact the owner of the data being copied to obtain permission 2 Contact Information Additional information as well as firmware updates can be obtained from the following Internet http www webtransmitter com Mail R Engineering Inc Attn Rudy Boonstra 95 Cougar Ridge Heights SW Calgary Alberta T3H 4X5 Email rboonstra reng ca 3 System Requirements To properly implement the WebTransmitter the following minimum requirements are required Power 15 30Vdc Network The RJ45 will need to be connected to a network that provides the device with an IP address via DHCP and has direct access to the Internet Firewalls and Proxy Servers that either modify the header or require authentication may prevent the WebTr
3. ange AECO Gas Price C GJ e E 3 AESO Forecasted Electricity Price C MWhr Three 3 Hours Ahead Forecast Loop Maximum Value maximum value expected to be obtained from the Internet default value is 1000 Loop Error Maximum number of times in a row a bad value may be read from the WEB before the 4 20mA output is driven to the Loop A Error Value state 9 Display Upon startup the unit will display a message similar to the following on the on the display first obtaining an IP address then downloading the most current configuration if possible and lastly initiating a WEB query to poll the information as per the downloaded configuration Figure 2 Display Start Up When the SW3 button is pressed the system information is displayed Version 1 E System Clock 2013 05 13 15 10 52 System Uptime 13 02 34 21 MAC is 00 00 00 00 00 00 IP is 000 000 000 000 Figure 3 Display System Information WebTransmitter UsersManual v1 4 docx Page 6 of 7 Web Transmitter User Manual When the SW5 button is pressed once the IP address is registered on the WebTransmitter com database This option is provided to facilitate additional troubleshooting diagnostic information and confirm that the Web Transmitter is able to communicate to the Internet This information is updated in the http www webtransmitter com database and is displayed R Engineering Inc S N 7 at F W 1 E Installed 2013 05 13 14 52 36 DB Updated
4. ansmitter from functioning properly Control System A minimum of one 4 20mA analog input is required in the control system This input must either be active such that it internally supplies the loop with approximate 24Vdc or passive complete with an external 24Vdc power supply The maximum loop voltage is 36Vdc and the minimum loop voltage is 7 5Vdc but 24Vdc is recommended and should be specified Additionally the following optional features may be utilized WebTransmitter_UsersManual_v1_4 docx Page 2 of 7 WebTransmitter User Manual Control System A second 4 20mA analog input the same as above may be used A set of dry contacts normally open are included on the WebTransmittter The default function for these dry contacts which are rated for SA at 30Vdc are to provide a discrete input into the control system so that it can monitor the health of the WebTransmitter Each time the WebTransmitter queries the Internet the contacts close Note that optional functionality can be made available for these dry contacts The control system can utilize a relay to reset the board In the unlikely event that the Web Ttransmitter is not responding properly as detected by the dry contacts above the WebTransmitter can be remotely reset Display An optional LCD Display is available to provide status information of the WebTransmitter Note that the display may be plugged in or removed while the Web Transmitter is power up and function
5. ch On board system No This feature is also available reset by connecting J2 terminals 2 and 3 together if SW2 a power on Optional Shorting block required there is no optional switch Display system k nn Optional Reguire optional display Initiate WEB query Optional SW5 Register MAC No address and IP address In cases where the WebTransmitter is mounted with optional switches and the on board switches are not accessible the functions of SW5 can be obtained by pressing SW3 and SW4 simultaneously Note that if you press the SW5 switch twice before a poll is initiated the unit will do a soft reset This is useful to force the unit to re load the configuration XML file should it be changed The display is instrumental in allowing the user to watch the configuration parameters and shows both the system values as well as the new values loaded from the configuration file 8 System Configuration Mode The configuration xml file can only be altered by Rudy Boonstra as they are stored on the http www webtransmitter com web site The following parameters are available for adjusting Loop Time duration between polls default value of five minutes or 300 000 msec Loop Type determines what data is to be obtained from the Internet as listed below e SMP AESO System Marginal Electricity Price C MWhr WebTransmitter UsersManual v1 4 d0cx Page 5 of 7 WebTransmitter User Manual e NGxX Natural Gas Exch
6. ing External Switches External switches are available that mimic the functionality of on board switches SW3 and SW4 4 Consumable Parts The WebTransmitter has the following consumable parts They can either be sourced directly by the user or through R Engineering Inc Battery CR2032 3Vdc Lithium lon Coin Cell Battery When this battery drops below 2 9Vdc and the board is without power via the terminal strip the internal memory settings may be reset to default Versions 0 x may need to be reprogrammed as via the internal WEB server Versions 1 x and newer have a configuration file that is stored on the WEB as an XML file system memory is only used when this file is not available Fuses Main Board Power LittelFuse 154 Series 2A 4 20mA Inputs 2x LittelFuse 154 Series 100mA WebTransmitter UsersManual v1 4 d0cx Page 3 of 7 WebTransmitter User Manual 5 External Connections The external connections are made via the ten 10 terminal Phoenix Contact connection header J2 as shown in Figure 1 below i i 90 A tas am rr Figure 1 Wiring Diagram For Loop B if you have the optional external switch installed in SW4 the light will go on when there is loop power available For Loop A if you have the optional external switch installed in SW3 the light will go on when there is loop power available For both Loop A and Loop B if the control system does not see a signal the external swi
7. tch LED if installed may be used to indicate that there is loop power If the switch is not installed and it is believed that all the connections have been made properly one can verify that the corresponding 100mA fuse Loop A F2 and Loop B F1 has not blown open If SW2 is on with 15 30Vdc power applied to terminals O and 1 and for PWR the green LED labeled D4 should illuminate If it does not light up then the 2A fuse F3 may have blown open or the polarity may be reversed 6 Network Connection When you have a proper network connection and the WebTransmitter is properly powered up you should see activity on the small green LEDs on located adjacent to the RJ45 connector As soon as the WebTransmitter is powered up it will try to obtain an IP address from the network DHCP server After an IP address has been assigned the WebTransmitter will Web Transmitter UsersManual v1 4 d0cx Page 4 of 7 Web Transmitter User Manual download the configuration file If the system clock is not properly set the system clock is adjusted based on the time specified in the returned http header with the config file At this point the WebTransmitter is ready and will start the perpetual loop of obtaining WEB data every X minutes where X is defined in the system configuration typically every five minutes or 300 000 msec 7 User Buttons There are five user buttons on the Web Transmitter as follows Label Function External Notes Swit
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