Using Enercept Energy Meters with BACnet Protocol
Contents
1. i If connecting a single Enercept to the BAS Remote with no other Modbus devices use the sample lt bas_cfg csv gt file from the corresponding Sample Project folder provided either the Veris H8035 Single Power Meter Project folder or the Veris H8036 Single Power Meter Project folder If these folders are not available contact Veris technical support at 800 345 8556 ii If connecting multiple devices to the BAS Remote either multiple Enercept meters or one meter and other devices follow the instructions in the BAS Remote User Manual to a create a new project and build the lt bas_cfg csv gt file for the configuration required When adding an Enercept meter to the project as a new device the Project Builder asks for a Modbus Device Profile Point the browser to the appropriate Veris Profile either lt Veris H8035_M2B xls gt or lt Veris H8036_M2B xls gt These files are posted on the Contemporary Controls website at www ccontrols com basautomation m2bsoft and are available from Veris technical support at 800 345 8556 3 Transfer the lt bas_cfg csv gt file to the data config directory on the BAS Remote using an FTP client Use the native FTP client on a Windows XP computer from the COMMAND prompt or download a Windows based utility there are many good free ones like FileZilla Accessing the file system on the BAS Remote requires a user name and password the default user name is a2. protocol not BACnet A new product called the BAS Remote model BASR 8M created by Contemporary Controls allows easy integration of H803x Enercept power meters with existing BACnet devices The BAS Remote acts as a Modbus to BACnet IP gateway Multiple Enercept meters can operate with a single BAS Remote reducing commissioning costs for large projects Note that the BAS Remote does not provide a gateway from Modbus to BACnet MS TP serial VN55 Page 1 VERIS INDUSTRIES 2011 800 354 8556 or 1 503 598 4564 Configuring an Enercept Meter and a BAS Remote for Operation with BACnet Protocol 1 Configure network settings on the BAS Remote for your network This requires a fixed IP address which may need to be assigned by IT personnel b Use the instructions in the User Manual to set the IP address subnet mask and gateway if used The installer can also set names description location etc for the system and the unit used optional c Connect power to the BAS Remote according to the instructions in the User Manual d Connect the BAS Remote to the network Ensure that the network drop is active and is connected to the proper subnet i e If the subnet mask is 255 255 255 0 and the assigned IP address is Xxx xxx 154 xxx where xxx can be any value the device needs to be connected to subnet 154 2 Create a lt bas_cfg csv gt file with the desired Modbus to BACnet gateway configuration Use either of the following methods
3. 18 Regist er4 283 Float ing Point HI LO R_Only H8 36 1 Power Factor phase C AI 1649285 POWER_FACTOR 18 Regi ster4 285 Float ing Point HI LO R_Only He 36 1 Voltage phase A B AI 18498287 VOLTS 18 Regist er4 287 Float ing Point HI LO R_Only H6836 1 Voltage phase B C AI 16462769 VOLTS 18 Regi ster4 289 Float ing Point HI LO R_Only H6 36 1 Voltage phase A C AI 16462791 VOLTS 18 Regi ster 40291 Float ing Point HI LO R_Only H8 36 1 Voltage phase A N AI 1849293 VOLTS 18 Registe r46293 Float ing Point HI LO R_Only H8 36 1 Voltage phase B N AI 1649295 VOLTS 18 Regi ster4 295 Float ing Point HI LO R_Only H8 36 1 Voltage phase C N AI 1048297 VOLTS 18 Regi ster4 297 Float ing Point HI LO R_Only H 836 1 Current phase A AI 1846299 AMPERES 18 Regi ster4 299 Float ing Point HI LO R_Only H6836 1 Current phase B AI 1840301 AMPERES 18 Regi ster4 3 1 Float ing Point HI LO R_Only H6836 1 Current phase C AI 1840303 AMPERES 18 Regi ster4 303 Float ing Point HI LO R_Only H8836 1 Average Real Power AI 1646365 KILOWATTS 18 Regi ster4 3 5 Float ing Point HI LO R_Only H8836 1 Average Real Power AI 1646307 KILOWATTS 18 Regi ster40387 Float ing Point HI LO R_Only H 836 1 Maximum Real Power AI 1648369 KILOWATTS 18 Regi ster4 3 9 Float ing Point HI LO R_Only VN55 Page 2 VERIS INDUSTRIES 2011 800 354 8556 or 1 503 598 4564 08111 HQ0000432 B e Since the BACnet objects reside in the BAS Remote not in the individual devices they can be discovered and read even if the Enercept o
4. 261 Floating Point HI LO H6635 1 Energy Consumption H6835 1 Real Power KILOWATT HOURS KILOWATTS R_Only R_Only Figure 2 Object List for the Single H8036 Example at Modbus Address 10 BACnet Information Return to Main Sheet ii Print Preview Print File H8836 1 Energy Consumption AI 1640259 KILOWATT_HOURS 18 Register 48259 Floating Point HI LO R_Only H8 36 1 Real Power AI 1646761 KILOWATTS 18 Register 48261 Floating Point HI LO R_Only H 836 1 Reactive Power AI 1640263 KILOVOLT_AMPERES REACT 1 Regi ster4 263 Float ing Point HI LO R_Only H6836 1 Apparent Power AI 10940265 KILOVOLT_AMPERES 18 Regi ster4 265 Float ing Point HI LO R_Only H6 36 1 Power Factor AI 1040267 POWER FACTOR 18 Regi ster4 267 Float ing Point HI LO R_Only H8 36 1 Voltage line to line AT 10462769 VOLTS 18 Regi ster4 269 Float ing Point HI LO R_Only H8 36 1 Voltage line to neutral AI 1046271 VOLTS 18 Regi ster4 271 Float ing Point HI LO R_Only H8 36 1 Current AI 1649273 AMPERES 18 Regi ster4 273 Float ing Point HI LO R_Only H8836 1 Demand power phase A AI 1646275 KILOWATTS 18 Regi ster4 275 Float ing Point HI LO R_Only H6636 1 Demand power phase B AI 1040277 KILOWATTS 18 Regi ster4 277 Float ing Point HI LO R_Only H6 36 1 Demand power phase C AI 1048279 KILOWATTS 18 Regi ster4 279 Float ing Point HI LO R_Only H 836 1 Power Factor phase A AI 16406261 POWER_FACTOR 18 Regi ster4 281 Float ing Point HI LO R_Only H8836 1 Power Factor phase B AI 1646283 POWER_FACTOR
5. Veris Application Note N55 Using Enercept Energy Meters With BACnet Protocol AN DANGER WAN ALAN OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Follow safe electrical work practices See NFPA 70E in the USA or applicable local codes e This equipment must only be installed and serviced by qualified electrical personnel e Read understand and follow the instructions before installing this product Turn off all power supplying equipment before working on or inside the equipment e Use a properly rated voltage sensing device to confirm power is off DO NOT DEPEND ON THIS PRODUCT FOR VOLTAGE INDICATION e Only install this product on insulated conductors Failure to follow these instructions will result in death or serious injury The information provided herein is intended to supplement the knowledge required of an electrician trained in high voltage installations There is no intent to foresee all possible variables in individual situations nor to provide all training needed to perform these tasks The installer is ultimately responsible to assure that a particular installation will be and remain safe and operable under the specific conditions encountered Introduction BASR 8M Use of the BACnet communication protocol is increasing in building automation systems applications Veris Enercept H8035 and H8036 meters are an excellent option for monitoring energy consumption but their communication link uses Modbus
6. device did not respond to the most recent poll vii EVENT_STATE implemented but usually reports NORMAL viii OUT_OF SERVICE implemented but does not indicate if the Modbus device is out of service ix UNITS indicates the units associated with the Present_ Value Volts Amps kWh Power Factor etc of each object x COV_INCREMENT not used for polled objects default is 999999 9 Modbus Devices with a Gateway vs BACnet Devices When using Modbus devices with a BACnet gateway extra steps might be needed to ensure seamless integration with a BACnet system Installation of the gateway and the power supply or transformer in addition to the power meter increase cost and labor Installing multiple meters with a shared gateway reduces the additional cost for the device but the effort to commission them might increase with the gateway configuration complexity A Modbus to BACnet gateway also requires a custom built gateway configuration the bas_cfg csv file for each unique application This configuration must be re built and re downloaded into the gateway each time new devices are added The gateway vendor provides documentation profile templates technical support and a spreadsheet based tool to simplify this Veris Industries has collaborated with Contemporary Controls to build and test these templates and to make them as consistent as possible with other Veris products that have native BACnet support Veris also provides
7. direct technical support for the Modbus to BACnet systems VN55 Page3 VERIS INDUSTRIES 2011 800 354 8556 or 1 503 598 4564 The customer must also re configure the software when there is a change to the equipment used When any Modbus devices are added or changed the software must be updated with the new mapping of all Modbus registers Device Object Products with native BACnet support each have their own Device Object and they generally support additional BACnet features making them easier to program and maintain The Device Object uniquely identifies the type name description manufacturer version location characteristics and capabilities of each device When using more than one device of the same model each device holds a unique Device Object These products may be tested and certified not all are by BTL BACnet Testing Laboratories as BTL compliant Modbus products used with a BACnet gateway do not have unique Device Objects The Gateway is a single Object and all Modbus devices on that serial link share that Object The gateway may be tested and certified as BIL compliant most are not but the Modbus devices used with the gateway are not compliant Some customers want to connect their meter to a BACnet MS TP serial link rather than an Ethernet drop using BACnet IP Even though many BACnet applications utilize BACnet IP over Ethernet at some point in the system they may have a serial cable near the location where the
8. dmin and the default password is ctrlink 4 Reset the BAS Remote by turning its power supply off waiting a few seconds and turning it back on 08111 HQ0000432 B 5 Configure the BACnet parameters on the BAS remote d If using any other devices on the same Modbus link with Enercept meters set sk their Baud rates to 9600 and their Parity to NONE a Follow the instructions in the BAS Remote User Manual to access the BAS Remote s webpage by entering the IP address in a web browser on the same network 8 Use BACnet software to access the Enercept H803x meter a The Device Instance set in Step 3 refers to the BAS Remote b Set the Device Instance to the preferred value This must be a value that is unique for the overall BACnet enterprise b All data objects set up in the gateway project are referenced using this Device Instance the individual Modbus meters or other devices do not have separate 6 Configure the Modbus parameters on the BAS remote Device Instances a Follow the instructions in the BAS Remote User Manual to access the BAS Remote s webpage by entering the IP address in a web browser on the same network c The Object Instance numbers assigned are a concatenation of three decimal values i The Modbus address 2 decimal digits b Set the Baudrate to 9600 This is the only rate the Enercept H803x can use ii The decimal value 40 c Set the Parity to NONE This is the only val
9. meter is installed or be more willing to extend an existing MS TP loop to that location than to add an Ethernet drop and a fixed IP address for one or more meters Serving these applications requires a Modbus RTU to BACnet MS TP gateway rather than a BAS Remote Data Object Each product with native BACnet support contains a unique set of data objects accessible through customer software If multiple units are used on the same network they each operate identically and independently making it easy to integrate more Software that accesses these products need only be touched once to add a device to the network Modbus products used with a BACnet gateway have data objects resident in the gateway that get mapped to their individual Modbus registers If multiple units are used on the same network they must be numbered uniquely across all units The objects exist in the gateway even if the physical product is not present or is not operating properly see 8e above Innovative Monitoring Solutions The BAS Remote Modbus to BACnet gateway allows more options for peripheral monitoring devices Instead of being confined only to those devices equipped with the BACnet communication protocol a facility administrator can now incorporate Modbus devices into a BACnet networked building The Enercept power meter with the BAS Remote is an excellent choice for easy integration into existing systems 08111 HQ0000432 B
10. r other Modbus devices are not communicating i e if they are not connected not powered or not set up properly If the Modbus device fails to communicate the values read from these objects will either be initial values usually zeros established when the objects were initialized or they will be the last known values read from the device operating at some prior time To verify the devices are operating correctly before relying on the data check the Status_Flags Property immediately prior to reading the Present_Value if a device is not operating properly the Status_Flag reports a fault f The BAS Remote polls all configured Modbus registers at regular intervals set by the Offline Poll Period setting in the Modbus tab of the web based configuration page The default value is 15000 msec which corresponds to a 15 seconds polling interval g While the Analog_Input objects created by the BAS Remote support a number of properties the most useful are PRESENT_ VALUE UNITS and STATUS _ FLAGS Properties supported are i OBJECT_IDENTIFIER the object type and instance i e Al1040259 ii OBJECT_NAME i e H8035 1 Energy Consumpt 1040259 iii OBJECT_TYPE i e Analog_Input iv PRESENT_VALUE the value polled from the mapped register in the Modbus device v DESCRIPTION implemented but returns Default channel description vi STATUS_ FLAGS this indicates the status of the polled object will indicate FAULT if the Modbus
11. ue the Enercept H803x can use 7 l l l l l iii The decimal value of specific Modbus register address in the device 7 Configure the Enercept and other Modbus devices if applicable l l l i for example if the Modbus address is 10 Modbus Register 259 is referenced a Install and power the Enercept according to the Installation Guide by the BACnet Analog_Input object instance 1040259 b Connect the Modbus RTU signals of the Enercept to the MB inputs on the BAS Remote Refer to the instructions in the Installation Guides for all devices and the BAS Remote d The Object Instances for the data objects that access the Modbus registers of all the Modbus devices in the project are documented in the spreadsheet whose file name ends with Documention yes that s how it is spelled Figures 1 and 2 show the contents of those files for the example projects c Set the Modbus addresses to match those set up in the gateway project If provided for a single Enercept at Modbus address 10 using one of the lt bas_cfg csv gt files pre configured for a single Enercept device the Modbus address must be 10 The BAS Remote reserves all Modbus addresses below 10 for internal 1 0 devices Figure 1 Object List for the Single H8035 Example at Modbus Address 10 Print File Return to Main Sheet Modbus Information Print Preview BACnet Information Al 1646259 Al 1646261 18 Register 48259 Floating Point HI LO 18 Register 480
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