ECM-1220 User`s Manual - Power/Energy Monitors
Contents
1. PC sends three plus signs no carriage return The dongle responds with lt OK gt PC sends ATDNE98 and a carriage return The dongle searches for node E3 and responds with either lt OK gt or lt ERROR gt If an lt OK gt response was received the node is discovered and ready to communicate it takes a couple of seconds to exit the AT mode before communication can begin If an lt ERROR gt response resulted you will need to reset the ECM 1240 s XBee radio again Make sure the coordinator and the ECM 1240 are at a dependable range while performing this procedure Brultech Research Inc www brultech com BRU IECH Brultech Research Inc VIEWING THE ECM 1240 SETTINGS A single command set will instruct the ECM 1240 to transmit 32 bytes containing its settings These include CT setting PT setting Data Logger Storage Interval Unit ID Firmware Version The procedure for reading the 32 bytes is PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes S E T must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes R C V must be upper case characters ECM 1240 responds with FC hex ECM 1240 sends 32 bytes PC sends FC hex Byte 1 CT1 Type 2 CT1 Range 3 CT2 Type 4 CT2 Range 5 PT Type 6 PT Range 7 Packet send frequency seconds 8 Data Logger Storage Interval 9 Firmware Version hi byte 10 Firmware2. Version low byte 11 DevicelD pre programmed 12 Device Serial Number hi byte 13 Device Serial Number low byte 30 Trigger value low byte watts 31 Trigger value high byte watts 32 Byte 0x00 33 Checksum of 32 previous bytes not including the FC Brultech Research Inc www brultech com BRULIECH Brultech Research Inc Modifying the settings CT setting PT setting Data Logger Storage Interval Unit ID Modifying CT Settings PC sends ECM 1240 responds with PC sends three ASCII bytes ECM 1240 responds with PC sends three ASCII bytes ECM 1240 responds with PC sends three ASCII bytes ECM 1240 responds with PC sends a single byte ECM 1240 responds with PC sends three ASCII bytes ECM 1240 responds with PC sends a single byte FC hex FC hex S E T must be upper case characters FC hex C T 1 for CH1 CT use C T 2 for CH2 CT FC hex T Y P must be upper case characters FC hex chr type example CT type 100 chr 100 FC hex R N G must be upper case characters FC hex chr range example CT range 4 chr 4 ECM 1240 responds with FC hex Modifying PT Settings PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes ECM 1240 responds with PC sends three ASCII bytes ECM 1240 responds with PC sends a single byte Brultech Research Inc S E T must
3. the value that the AUX channels read This allows you to monitor a 240V balanced load with 1 CT PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes S E T must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes O P T must be upper case characters ECM 1240 responds with FC hex PC sends a single byte chr val where each bit enables X2 gain for that AUX channel ECM 1240 responds with FC hex Set number of CTs on an AUX channel PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes S E T must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes T R 1 for AUX1 CT use T R 2 for AUX2 CT etc Brultech Research Inc www brultech com BRU IECH Brultech Research Inc ECM 1240 responds with FC hex PC sends a single byte chr val where val is chosen as below ECM 1240 responds with FC hex val OO 2 or less CTs 01 3 CTs 02 4 or 5 CTs 03 6 CTs 04 7 CTs Brultech Research Inc www brultech com BRULIECH Brultech Research Inc ACQUIRING DATA VALUES Power You may have noticed that the power watt or kilowatt is not included in the packet This value is easily and accurately calculated from the received data The energy information sent is in the form of watt second This is th
4. BRU IECH Brultech Research Inc ECM 1240 Commands Ver 3 Apr 15 09 Terms of Use and Copyright Notice This document provides intellectual information which is the property of Brultech Research Inc This document is subject to the terms and conditions listed below This document has been provided to you by Brultech Research Inc on condition of your acceptance of the following terms and conditions Personal and Non Commercial Use Limitation This document is for your personal and non commercial use only You may not modify copy distribute transmit display perform reproduce publish license create derivative works from transfer or sell any information obtained from this document without the expressed written consent of Brultech Research Inc Brultech Research Inc reserves the right to terminate your access to this information at any time without notice for any reason whatsoever Liability Limitations The information included in this document may include inaccuracies or typographical errors Agreement of the Terms Proceeding to the next page indicates that you agree to the terms set out in the above paragraphs Brultech Research Inc www brultech com BRU IECH Brultech Research Inc You must agree to the terms and conditions described on page one before reading the next pages INTRODUCTION Many of the ECM 1240 s settings are modified using the RS 232 port or the XBee wireless interface Serial communication is do
5. be upper case characters FC hex P T T must be upper case characters FC hex chr type example PT type 230 chr 230 www brultech com BRULIECH Brultech Research Inc ECM 1240 responds with FC hex PC sends three ASCII bytes P T R must be upper case characters ECM 1240 responds with FC hex PC sends a single byte chr range example PT range 3 chr 3 ECM 1240 responds with FC hex Modifying Packet Send Frequency 1 to 255 seconds The packet frequency is the number of seconds between each packet send This value is in seconds and can be from 1 sec to 255 sec PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes S E T must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes P V 2 must be upper case characters ECM 1240 responds with FC hex PC sends asingle byte chr interval value sends the ascii character representing the interval ECM 1240 responds with FC hex Setting ECM 1240 Packet Send Trigger Value 1 to 32 000 Watts This two byte value represents the amount of power change required to send a packet immediately within one second The trigger function applies to CH1 or CH2 only PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes S E T must be upper case characters ECM 1240 responds with FC hex PC sends thre
6. ckets every second interval defined by the Send Packet frequency Send a single Polarized Packet real time must be off for this command to execute PC sends FC hex ECM 1240 responds with FC hex PC send three ASCII bytes S P K must be upper case characters ECM 1240 responds with FC hex ECM 1240 send a single polarized packet Enter THRU Mode connects RS 232 port directly to XBee serial com port This mode is entered to allow direct communication with the XBee module providing the option of modifying the XBee module s settings or firmware The baud rate is only dependent on that of the XBee module Once this mode is entered the yellow LED will be on solid To exit this mode the power to the ECM 1240 must be cycled PC sends FC hex ECM 1240 responds with FC hex PC send three ASCII bytes B T 1 must be upper case characters Brultech Research Inc www brultech com BRU IECH Brultech Research Inc ECM 1240 responds with FC hex PC send three ASCII bytes chr 5 sends the ascii character 5 ECM 1240 responds with FC hex Reboot the ECM 1240 PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes R Q S must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes R L P must be upper case characters ECM 1240 responds with FC hex Enable X2 Gain for AUX channels X2 Gain mode will double
7. e ASCII bytes P V 3 must be upper case characters ECM 1240 responds with FC hex PC sends asingle byte chr low byte value sends the ascii character representing the low byte ECM 1240 responds with FC hex PC sends asingle byte chr hi byte value sends the ascii character representing the hi byte Brultech Research Inc www brultech com BRU IECH Brultech Research Inc ECM 1240 responds with FC hex Resetting all ECM 1240 Accumulated Watt Second Counters and Seconds Count PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes R Q S must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes R K W must be upper case characters ECM 1240 responds with FC hex Toggling the energy polarity The polarized watt second counter will increment only when energy flows in one direction Renewable energy installations with the capability of delivering excess generated power onto the powerline grid would cause the energy to be travelling in the opposite direction from the normal power consumption direction The ability to discern between the two and calculate the net difference is called net metering The ECM 1240 accomplishes this by using two watt second counters one which accumulates regardless of the direction of power and a second counter which accumulates watt seconds flowing in one direction only The following command det
8. e amount of power used during one second The power may then be calculated by Watt Second from latest packet minus Watt Second from the previous packet Elapsed second value from latest packet minus Elapsed second value from the previous packet OR SIMPLY Power watts A Watt Seconds A Seconds Kilowatt Hour KWh This is the most important data measured by the ECM 1240 In order to provide a fine resolution of KWh the packet provides Watt Second information Since there are 3600 seconds in one hour one watt hour Watt Second 3600 Since 1000 Watt 1 Kilowatt then 1 Kilowatt Hour Watt Seconds 3600 1000 OR SIMPLY Kilowatt Hour KWh Watt Second 3600000 Cost of Energy The cost of energy consumed is a matter of multiplying the KWh time the rate charged by the power company Many of the power companies now have a varying rate based on many factors which is beyond the scope of this document This is best obtained from the power company s web site Cost KWh x Rate Charged per kilowatt hour CO2 Emissions Lately energy use is sometimes represented by the amount of CO2 gases generated to produce the power consumed This is simply a matter of multiplying the amount of KWh consumed by a CO2 emission per KWh value This value is dependent on the area the measurements are taken and the method used for the power company to generate the consumed energy CO2 Emissions KWH x CO2 emissions KWh Brult
9. ech Research Inc 10 www brultech com
10. ermines whether the watt second energy increment when power is consumed or generated This is only useful for renewable energy installations It should be noted that once this is set That unplugging the wall transformer and replugging it 180 degrees swapping the prong polarity will cause the energy polarity to reverse direction for both CH1 amp CH2 PC sends FC hex ECM 1240 responds with FC hex PC sends three ASCII bytes S E T must be upper case characters ECM 1240 responds with FC hex PC sends three ASCII bytes N G 1 for CH1 or N G 2 for CH2 ECM 1240 responds with FC hex Brultech Research Inc www brultech com BRU IECH Brultech Research Inc Set Real Time data to ON ECM 1240 Extended Packets PC sends FC hex ECM 1240 responds with FC hex PC send three ASCII bytes T O G must be upper case characters ECM 1240 responds with FC hex PC send three ASCII bytes 9C T D must be upper case characters ECM 1240 begins sending packets every second interval defined by the Send Packet frequency Set Real Time data to OFF applies to any real time format PC sends FC hex ECM 1240 responds with FC hex PC send three ASCII bytes T O G must be upper case characters ECM 1240 responds with FC hex PC send three ASCII bytes O F F must be upper case characters ECM 1240 begins sending pa
11. ne using 19 200 baud 8N1 whether communicating via the RS 232 port or XBee module Commands may also be sent via EtherPort or EtherBee Anytime XBee communication is employed the ECM 1240 should discover a PAN The coordinator Dongle or Etherbee should then set the destination node to the ECM 1240 Node ID which is typically set to E3 DISCOVERING THE ZIGBEE NODE Zigbee communication consists of one coordinator and one or more routers or end devices for a given Personal Area Network PAN In an effort to keep this section brief we will not explore the Zigbee structure There is a lot of information available on the internet regarding this topic lf the XBee Dongle or EtherBee coordinator has previously discovered and communicated with the ECM 1240 they will likely re discover each other should power be interrupted to either or both devices If the coordinator cannot discover the ECM 1240 the monitor s XBee radio must then be reset The procedure for this is described here Resetting the XBee Radio to Allow it to Connect to a PAN With the ECM 1240 powered up and in operation press the F1 switch and maintain it for 6 seconds The LEDs will turn off for a while indicating that the XBee radio is performing a reset ATNRO command Once this task is complete the LEDs will come back on and the ECM 1240 will be functioning normally Discovering the ECM 1240 radio With a PC connected to the coordinator dongle or etherbee
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