Issue When running VisiSat 2.1 build 196 (200 or 201) a message is displayed - “Unable to Load the Schneider Electric CET Style DLL” and VisiSat fails to launch. Product Line Satchwell MicroNet Environment Windows (Windows, XP Professional, Windows 7, Windows Vista Ultimate) Microsoft Visio Cause .NET Framework 2.0 is not installed. Resolution Check that the version of VisiSat installed is either v2.1 196 or for SP1 build 200 or for SP2 build 201 on a computer running with a supported operating system and Microsoft’s Visio version.   MicroNet Software Datasheet   The suggested procedure to correct the “Unable to Load the Schneider Electric CET Style DLL” issue as follows: - Uninstall VisiSat Install .NET Framework 2.0 Install VisiSat 2.1 196, add service packs 1 and 2 files as required. Re-boot computer Run VisiSat. Links to VisiSat software and information:   The VisiSat main software can be downloaded from the link below: https://ecoxpert.se.com/search?documentUUID=c93346a7-9d82-48e7-9b54-a866ac75bb71&title=VisiSat%202.1%20Build%20196%20-%20Software   VisiSat service pack 1 can be downloaded from the link below: https://ecoxpert.se.com/search?documentUUID=fd2e9849-1ffe-4c10-b3a6-5f27bac91870&title=VisiSat%20Release%202.1.196%20Service%20Pack%201%20(2.1.200)%20-%20Software   VisiSat service pack 2 can be downloaded from the link below: https://ecoxpert.se.com/search?documentUUID=839c09d2-400d-4434-8b1e-97f339545034&title=VisiSat%20Release%202.1.196%20Service%20Pack%202%20(2.1.201)%20-%20Software   VisiSat documentation can be downloaded from the link below: https://community.exchange.se.com/t5/Building-Automation-Knowledge/Download-latest-VisiSat-Data-Sheets-Engineering-Guides/ta-p/6110

Issue Faulty operation of BMS equipment due to electrical interference from other equipment can be difficult and costly to identify and fix.  Guidance is required for the best installation practices to minimize the source of the interference and to protect against it when it occurs. Product Line Andover Continuum, EcoStruxure Building Operation, Field Devices, Satchwell MicroNet, Satchwell Sigma, TAC IA Series, TAC Vista Environment All electrical equipment Cause Poor installation can cause equipment to generate high and low-frequency electromagnetic interference that can disrupt the operation of other systems. Resolution Schneider Electric has produced a document Practical Installation Guidelines which discusses the theory and offers practical guidelines to protect against and minimize the generation of, electromagnetic interference.

Issue What utility in Windows XP can disable items in Startup? Environment Windows XP Cause Items that run on startup can sometimes make the boot up process for a PC very slow. Depending on which applications have been added to start automatically on startup, it can also cause problems if things load in the incorrect order. Resolution Click the Start button in Windows XP Select Run Type msconfig and click OK.

Issue How to find the IP address information on a PC? Environment Windows Operating Systems Cause Need to identify the IP address of the workstation (PC). Resolution For a Windows 95/98 PC, go to a DOS screen and run WINIPCFG. For a Windows NT / XP / Windows7 / Server 2008 PC, run a CMD window and run IPCONFIG.

Issue I'm not sure the network card is working on this PC. Is there a way to Ping or test the card? Environment PC Network Interface Card Cause Testing the network card is the first step in troubleshooting basic setup of an IP system. Resolution Assuming you have the correct protocols loaded, you can do a loop-back test. Go to Start > Run > and type "cmd" Type the command: ping 127.0.0.1  127.0.0.1 is the loop-back address. If the card is operating, you should get a reply

Issue Change an IP address on Windows 8 to a static address. Product Line Other Environment Windows 8 Cause Changing the IP address of a PC is often done to ensure it resides on the same subnet and network as the system or devices it is trying to communicate with. Resolution From the Start Menu (Tiles), open the Charms bar by moving the mouse to the right bottom corner of the screen or press the Windows Key + C and click on Search. Highlight Settings. In the Search box type Network to search for any network related options From the list options choose Network and Sharing Center. From the View Your Active Networks section, select Local Area Connection. Go to Properties. Result: The Local Area Connection Properties screen appears. Highlight Internet Protocol Version 4 (TCP/IPv4) and click on Properties. Result: The Internet Protocol Version 4 (TCP/IPv4) Properties screen appears. Click Use the following IP address. Complete the configuration fields as shown below. This part of the configuration requires attention to detail, because one error will prevent you from getting on the network. Be sure you have this information at hand when you start to configure the TCP/IP protocol: IP Address: x.x.x.x Subnet mask: 255.255.255.0 Default gateway: x.x.x.x  Enter these numbers in the appropriate fields and click OK. Continue to click OK or Close as appropriate until you return to the Network Connections screen. The Local Area Connection icon text should now say "Enabled". To test the new IP address: Open a command prompt in Windows 8 Swipe to show apps screen Scroll down and locate Windows system section heading Under Windows system, press or click on Command Prompt (a new Command Prompt window will open up on the Desktop.) You then can type in IPCONFIG then hit Enter and look for the new IPV4 address. You can also try to type in PING (IP ADDRESS) that should reply with the new IPV4 address if set correctly.

Issue Some helpful basic IP commands. Product Line Other Environment Computer with IP NIC or Network Cause Need for basic IP configuration or IP address Resolution Go to start, click run and type in "cmd". This takes you to the command prompt. Type in: "ping xxx.xxx.xxx.xxx" to see if your device is online and its response time. Make sure you put the space between "ping" and "xxx". "ipconfig" and hit enter to get the info of the computer you are currently using. You'll get the IP address, subnet mask and the gateway. "ipconfig/all" and hit enter to get more info on the machine your using. It will give you all the above and then some including the DNS server addresses. "tracert xxx.xxx.xxx.xxx" and hit enter and you can see the servers that you are going through to get to your destination. This can be used when connecting to a Loytec or a iLon and the IP address is being presented to the L-IP or iLon is unknown. Connecting through a firewall/gateway/NAT server, you are not presenting the PC's address - when you do the tracert you will go through your gateway and the next address will be the IP you are presenting- Use this in the iLon as the LNS server address.

Issue What is Domain Name Service (DNS)? Environment TCP/IP Networks Cause DNS is a distributed hierarchical system for resolving host names into IP address. Under DNS, there is no central database with all of the Internet host information. The information is distributed among thousands of name servers organized into a hierarchy similar to the UNIX file system. DNS has a root domain at the top of the domain hierarchy that is served by a group of name servers called the root servers. Source: TCP/IP Network Administration by Craig Hunt, O’Reilly & Associates, Inc. Resolution Short for Domain Name System (or Service or Server), an Internet service that translates domain names into IP addresses. Because domain names are alphabetic, they're easier to remember. The Internet however, is really based on IP addresses. Every time you use a domain name, therefore, a DNS service must translate the name into the corresponding IP address. For example, the domain name www.example.com might translate to 198.105.232.4. The DNS system is, in fact, its own network. If one DNS server doesn't know how to translate a particular domain name, it asks another one, and so on, until the correct IP address is returned.   Short for digital nervous system, a term coined by Bill Gates to describe a network of personal computers that make it easier to obtain and understand information. 

Issue Microsoft Visual Studio causes Just-In-Time Debugging Environment Windows Operating System Cause Visual Studio is installed on the PC and when attempting to perform a task, an error appears claiming Just-In-Time Debugging.  Resolution To disable Just-In-Time debugging: On the Tools menu, click Options. In the Options dialog box, select the Debugging folder. In the Debugging folder, select the Just-In-Time page. In the Enable Just-In-Time debugging of these types of code box, select or clear the relevant program types: Managed, Native, or Script. To disable Just-In-Time debugging, once it has been enabled, you must be running with Administrator privileges. Enabling Just-In-Time debugging sets a registry key, and Administrator privileges are required to change that key. Click OK.

Issue User name and password required Environment Satchnet Pro Plus   Cause Unknown access user name and password. Resolution User name = super Password = user

Issue Temperature Sensor Resistance Charts Product Line Andover Continuum, EcoStruxure Building Operation, Field Devices, Satchwell MicroNet, Satchwell Sigma, TAC IA Series, TAC INET, TAC Vista Environment Temperature Sensors Cause Temperature (°C) to Resistance Charts (ohms). Upgrading the site BMS, but retaining the existing sensors and the sensor resistance values are not known. Resolution The resistance of a sensor at a specific temperature can be downloaded here. The devices covered are Schneider-Electric's range including Andover, TAC and Satchwell and other manufacturers temperature sensors. All are detailed below. For the standard thermistor, tables click here, where the INET, I/A, and BALCO resistance tables are detailed. This is the chart for the Precon Thermistors - ACCTemp 10K Type III thermistor also known as the 10K4A1 Thermistor. For EcoStruxure I/O Module universal inputs, the type of thermistor bead is classed as a: "10k Type I (Continuum)" Satchwell T range is now known as STR600, STP660, STD600, STO600 10K3A1 with shunt Drayton DC1000, DC1100 30K6A1 is now known as STR600D, STP600D, STO600D Andover 10K4A1 TAC Inc. Vista 1.8KA1 I/A series 10K3A1 with 11K shunt INET 10K2A1 (10k Dale) BALCO 1000 ohm RTD Older Satchwell ranges: Satchwell DW1204, DW1305, DWS1202 Satchwell DO Satchwell DD/DR Other manufacturers include: Allerton 3K3A1 Ambiflex 2012, Honeywell Aquatrol, Jel/Thorn, Trend, York 10K3A1 Schlumberger (air) 5K3A1 Schlumberger (immersion) 100K6A1 Automatrix, York, Sibe 10K4A1 Honeywell 20K6A Landis & Gyr PT100A, PT1000A For I/A Series Controllers (MNL/MNB) Compatible sensors that have a built-in 11k shunt resistor include the TS-5711-850, TS-57011-850, TS-57031-850, and TSMN-90110-850 Series. Any sensor that matches resistance to temperature curve for a 10K Thermistor Type G (U.S. Sensor), Type 9 (Dale/Vishay) or Type III (ACI Series AH) can be used with the I/A Series MNL and I/A Series MNB series controllers, provided that a 11k ± 0.1% 1/8 watt resistor is wired in parallel with the sensor. The input has a range of -10 to 135 °F (-23.3 to 57.2 °C) with an accuracy of ±1% of span. Temperature / Resistance Reference Values Temperature Deg F (Deg C) Resistance Resistance Incl. 11k Shunt 32 (0) 25490 8,012 68 (20) 12,260 5,798 75 (25) 10,000 5,238 104 (40) 5,592 3,707 140 (60) 2,760 2,206 The full temperature / resistance table for the US Sensor 10K Thermistor R-T Curve Type G sensor can be found here. Please note that the controller may not be able to use the full temperature range shown in the table.  

Issue The Echelon LonTalk PCC-10 PCMCIA Network Adapter will not work with a Dell E6410 laptop. Product Line Satchwell MicroNet, Satchwell Sigma, TAC IA Series, TAC Vista Environment Echelon LonTalk PCC-10 PCMCIA Network Adapter Dell E6410 laptop Cause Dell E6400 Chipset Resolution To correct this, an entry needs to be added into the Windows registry. Option 1 Download a Windows registry import file from The Exchange. Navigate through Products > Satchwell > Sigma or MicroNet > Downloads > Hot Fix (Or you can download the file here RegedittoaddPCMCIACard.zip). Once downloaded, double click the file and the entry will automatically be added. Reboot the computer before the entry is read. Option 2 Manually add the entry into your registry. Use caution when making changes to the Windows registry. Mistakes can be fatal to the operating system. To manually add the entry, carry out the following: Go to Start > Run and use “regedit” to open the Windows registry. Navigate through to HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet Services Pcmcia Parameters Add a new DWORD entry called “IrqRouteToPciController” Modify the new entry and give it a hexadecimal value of 8 Reboot the computer before the entry is read. If option 1 or 2 do not resolve the issue, it may be necessary to perform the following:  Option 3 Open the registry editor. Go to the registry entry HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{68EE3401-D4CA-11D3-8DBB-0060082936F2} or HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{68EE3401-D4CA-11D3-8DBB-0060082936F2}\0000 and look for the key name "PcmciaExclusiveIrq". Delete the key name "PcmciaExclusiveIrq" (If it exists). You may need to reboot the PC. Further information may be available in the Echelon Knowledge Base on the Echelon website. This information can be found in Solution: KB763. For more information, please refer to TPA-SACH-10-0009.00 - LON PCC-10 PCMCIA Card with Dell E6410 Laptop

Issue After upgrade of Xbuilder or opening a project built on another computer generating the project causes a "File not found:" error message.   Product Line Satchwell MicroNet, TAC INET, TAC Vista Environment XBuilder Cause Find the alarm or event page that is causing this problem and view the reference field to identify the cause of the problem.   XBuilder was upgraded and the xmle files from the previous version are no longer present. XBuilder installation directory was on a different drive on the computer the project was last used on. Resolution In Xbuilder, right click on all the Alarm and Event pages, select Change reference, and browse in the new path to the referenced file.  

Issue Every time the computer reboots, LMGRD errors are shown at startup.   LMGRD encountered a problem and needed to close. lmgrd.exe - Application Error The instruction at "0x0012e854" referenced memory at "0xffffff91". The memory could not be "written". Product Line Other, Satchwell MicroNet, Satchwell Sigma, TAC Vista Environment Vista Server 5.0 FlexNet Licensing Remote Alarm Manager Sigma BAS2800+ Micronet Errors Cause There is a known issue with the new license server from Flexnet. The LMGRD.exe is actually crashing during shut down of the PC. Resolution This is nothing dangerous. What happens is that when you turn off the PC, something is happening with the license server during the shutdown phase. Since LMGRD runs as service, it can not display this error message during this shut down. The error message is shown the next time the PC is started. It will not affect anything since the error messages is queued from the last shutdown sequence, NOT during the startup. We think it has something to do with having a license server installed and not using only an entitlement license. In some situations, placing a customer license file from any project into the license folder along with the monthly demo license stops the LMGRD error. The license server may read the customer license, note that it is invalid, then use the monthly license. Flexnet is looking into this issue. Look for a fix in upcoming versions. On Sigma, BAS2800+, and Micronet systems where Remote Alarm Manager is installed, the TAC license server can be uninstalled as it is not used.

Warning Potential for Data Loss: The steps detailed in the resolution of this article may result in a loss of critical data if not performed properly. Before beginning these steps, make sure all important data is backed up in the event of data loss. If you are unsure or unfamiliar with any complex steps detailed in this article, please contact Product Support for assistance. Issue Error: "Could not create remote directory" or "Failed to establish connection with the target device" when trying to upgrade/downgrade a Xenta 5/7/9xx controller     Product Line TAC INET, TAC Vista, Satchwell MicroNet Environment Xenta Servers Xenta 511, 527, 527-NPR, 555, 701, 711, 721, 731, 913 XBuilder Cause This error can be caused by any of the following reasons: Trying to downgrade a Hardware version 2.x Xenta Server device to System Program version 2.10 or older Internet Options are configured to use a proxy server IP communication is not properly established due to incorrect IP settings, a bad cable or a faulty device The controller is 5.1.8 or lower and Microsoft KB 2661254 or KB 2661254-V2 is installed on the PC. In this upgrade Microsoft has changed the criteria for the certificate Key. Service packs are available on the extranet to correct this issue. Download blocked because of other Windows updates SSL 2 and 3 is not activated Resolution First, establish that the System Program that you are attempting to load is compatible with hardware version of the device. The older HW 1 versions can be upgraded to System Program 5.1.2 or older. Only system program versions 2.2.0 and newer can be loaded into devices that are hardware version 2.X. Hardware Version System Program 1.0 5.1.2 or older 2.X 2.2.0 or newer 3.X 5.1.6 SP1 or newer Note: Hardware version 1 devices are not labeled as HW 1 since only one version of hardware existed at the time. Hardware devices can be identified by the lack of any hardware version printed on the Neuron ID sticker. Note: If running the firmware update software, ensure you are running as an administrator. Next, check to verify that IP communications are configured properly and are functional: Check the IP address defined in XBuilder Verify a good connection to the IP port of the controller (10Base-T port on the far right) with a crossover cable. If that is all good, then a reformat of the controller may be necessary. Connect via Hyperterminal to the unit and at the dsh> prompt type format and press enter command . This will recreate the directory structure of the controller and allow you to attempt the upgrade/downgrade again. Finally, verify that the Internet Options are not configured to use a proxy server or, if they are, temporarily change them as follows: To temporarily change this setting follow these steps: In Internet Explorer select the Tools Menu and select Internet Options. Or select Internet Options from your Control Panel. Go to the Connections tab. Click the LAN settings button. Uncheck the Use a proxy server for your LAN box. Click Ok in the LAN settings window and the Internet Options window. Complete the System Program download. Return to the Internet Options window and re-check the Use a proxy server for your LAN box in the LAN Settings found in the Connections tab. Another Matrix explaining the compatibility of each with Vista versions can be found in Xenta-Server-firmware-versus-Vista-Server-versions If you have the Xenta FW 5.1.8 or lower and KB 2661254 or KB 2661254-V2 were installed during a Windows Update you will need install the service packs. These new service pack builds have been released and are available on the extranet. See TPA-VSTA-12-0028.00 - TAC Xenta Servers, Not Possible to Download Firmware for more info. Another issue has been reported to support relating to the bit length of the Xenta server boot certificate. The Xenta server installer uses a 512 bit key length of the boot certificate, and Windows in some instances can be configured for a 1024 bit length certificate. If the issue still exists after removing the above mentioned Windows Updates, or if you are getting this error and the Windows Updates are not on your machine. Download the attached tool, Allow Weak Certificates.zip, and execute the file, chose "Allow Weak Certificates", and "Update".   Here is what the tool set: Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\OID\EncodingType 0\CertDllCreateCertificateChainEngine\Config] "EnableWeakSignatureFlags"=dword:00000002 "minRSAPubKeyBitLength"=dword:00000200 If taking the preceding steps fails to resolve the issue then see the following articles for additional steps that can be taken: Xenta Server "Run" light is solid red, with no communication via Ethernet,  Fail to upgrade the TAC Xenta Server system software (firmware)  An unexpected error occurred while downloading using a Xenta Server

Issue Replacements for Satchwell sensors Product Line Satchwell MicroNet, Satchwell Sigma, Field Devices Environment DR DR3253 DRT DRT3451 DRT3453 DRT4453 DRT3651 DRT3652 DRT3801 DRT3851 DU DU4301 DUS DUS4302 DUSF DUSF4351 DUSF4352 DRTE DRTE2201 DRTE2801 DRTE2851 DRH DRH7702 DRH7703 DRTH DRTH7712 DRTH7713 DOT DOT0001 DOT0002 DOS DOS0002 DDT DDT1701 Cause Replacements for Satchwell Room sensors Resolution DOT0001/0002 Outside temperature sensor For CSC, KMC, MMC, IAC, MNN New part number: STO600/5126060000 DOS0002 Outside solar sensor For CSC, KMC, MMC, IAC, MNN New part number:  SSO600/5126050000 DR3253 Room sensor non-adjustable For SVT New part number: STR614/004604900 DRT3451 Room sensor exposed adjustment For CZU, CSC New part number: STR612/004604700 DRT3452 Room sensor concealed adjustment For CZU, CSC New part number: STR611/004604600 DRT3453 Room sensor non-adjustable CZU, CSC, CXR, CZT, KMC, MMC, IAC, MNN New part number: STR600/004604100 DRT4451 Room sensor non-adjustable As DRT 3453 in S-Link housing Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DRT3651 Room temperature sensor exposed adjustment For CXR, CZT, KMC, MMC, IAC, MNN New part number: STR602/004604300 DRT3652 Room temperature sensor exposed + LED For MMC, IAC, MNN Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DRT3801 Room temperature sensor fan switch On/off for CZU, MNN, IAC Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DRT3851 Room temperature sensor fan speed switches As above plus medium and high Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DU4301 Room sensor temperature For MNN & URC New part number: STR601/004604200 DUS4302 Room sensor temperature setpoint advanced basic sensor New part number: STR613/004604800 DUSF4351 Room sensor temperature setpoint adjustable fan auto/on/off fan override New part number: STR609/004604400 DUSF4352 Room sensor temperature setpoint advanced fan Auto/1/2/3 fan override New part number: STR610/004604500 DRTE2201 Active room detector Basic sensor Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DRTE2801 Active room detector On/off Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DRTE2851 Active room detector Off/low/medium/high Obsolete with no Schneider Electric replacement Suggestions: Try Titan Products or Sontay DRH7702 2% 0-10V DC humidity only For KMC, MMC, IAC, MNN New part number: SHR100/006902340 DRH7703 3% 0-10V DC humidity only For KMC, MMC, IAC, MNN New part number: SHR100/006902340 DRTH7712 2% 0-10V DC humidity with Satchwell NTC TEMP OUTPUT For KMC, MMC, IAC, MNN New part number: SHR100-T6/006902420 DRTH7713 3% 0-10V DC humidity with Satchwell NTC temperature output For KMC, MMC, IAC, MNN New part number: SHR100-T6/006902420 DDT DDT1701, DDT1702 and DDT0001 Duct sensor non-adjustable New part number: STD660 5126030000 Contact Details: Titan Controls: http://www.titancontrols.net/ Sontay Controls https://www.sontay.com

Issue Receive a temporary session password in exchange for the Session ID for a Xenta 5/7/9xx if the password has been lost. Product Line Satchwell MicroNet, TAC INET, TAC Vista Environment Xenta Servers Xenta 511, 527, 555, 701, 711, 721, 731, 913 SessionId Cause Lost root password for the controller or was changed from the original Username and password Resolution This option is used if the valid password has been lost or if a situation occurs that disables login. Get the session-id from the system. The session-id is displayed during startup login procedure. Email this session-id to Product Support. Product Support will then supply a corresponding password to let you access the unit. This password will expire at midnight, so if it has not been used until then, a new session id needs to be sent to Product Support. Login with user = session-id password = received password

Issue Connecting a serial cable to a Xenta 5/7/9xx controller Product Line Satchwell MicroNet, TAC INET, TAC Vista Environment Xenta Servers Xenta 511, 527, 555, 701, 711, 721, 731, 913 Cause Xenta Servers have a service portal for use with HyperTerminal with a serial connection to the RS-232B port. Resolution Connect a serial cable, Programming Serial Kit, part no. 0-073-0920-0, between the PC and the RS232 port B on the TAC Xenta.  For more information about the cable see Cable Guide OFL-3972. Go to Start/All Programs/Accessories/Communications/HyperTerminal, and open the HyperTerminal. In Connection Description Windows, type any name you like in the Name box. Click OK. In the Connect to window, choose the correct COM port that the RS-232 cable is using. If you do not know which COM port it is using. Go to your computer device manager. (Right click on “My computer” icon, and choose “Manage”. Then under “System Tools”, choose “Device Manager”. Find “Ports (COM & LPT)” and expend it Find the COM port number that is used by the RS-232 cable. Click OK. In the COM Properties window, type 9600 for “Bits per second”, 8 for “Data bits”, “Parity” is None, “Stop bits” is 1, and “Flow control” is None. Click OK. Options: you can save this setting for future use. Click on File Menu and Save. Press ENTER to activate the command prompt. Default username and password is both “root”. Type “root” and press ENTER for both the username and password. Type “setip” and press ENTER. NOTE: Product support has also witnessed strange behavior with serial connections when certain laptops were not plugged into a power source or the Xenta Server was not grounded. If connection problems persist after the connection setting above are verified, make sure the Hyperterminal PC is plugged into a 120 vac power source.

Issue Poor communications, communications failure or packet being corrupted Product Line Andover Continuum,EcoStruxure Building Expert,EcoStruxure Building Operation,Satchwell MicroNet,Satchwell Sigma,TAC INET,TAC Vista Environment Communications networks, BACnet MSTP, LON FT10, Infinet, Modbus RTU, Ethernet EMC (Electromagnetic compatibility) VSD Variable Speed Drive, VFD Variable Frequency Drive, Inverter Drive Cause Electrical Interference from Inverter (variable speed drives or VSD) Radiated or Induced RFI (Radio Frequency Interference) Resolution A VSD has the potential to create a large amount of electrical noise, to avoid causing issues it is vital they are installed as the manufacturer's instructions.  (Other devices also have this potential) Our systems are often used to control VSDs on fan motors, so if poor communications is found during the commissioning process, then try stopping all the fans in the area then re-testing the communications. A recent example was seen where LON FT10 communication was working ok until some VSDs were started, at this point LON devices and Object went offline intermittently. When all the VSDs were stopped the communication become completely stable. It was then possible to find which VSD was causing the problem and correct the VSD installation. In this case a LON analyzer would also have helped diagnose the issue.

Issue A specification for a power meter states that it provides KYZ pulse outputs. What is a KYZ pulse output? Product Line All Product Lines Environment Utility Meter with KYZ pulse outputs Cause Some meter specification sheets may state that the device outputs KYZ pulses. Resolution KYZ is a designation given to a relay used to create pulses for electrical metering applications. It is commonly a Form C relay (SPDT). The term KYZ refers to the contact designations: K for common, Y for Normally Open, and Z for Normally Closed.