Building Automation Knowledge Base

Issue Share the value of a DM point with several controllers using indirect points Environment I/NET Resident I/O Cause Sharing global points designated as DMs. Resolution Use an internal DI point with a "P0" calculation tied to the DM point. Set this DI as Global. The indirect points (which exist in the other controllers) should be built as DIs with the same Station Parameters used for the DM point.

Issue It is required for some sites to show the actual CO2 level in the SE8000 display, but this configuration is not documented. Product Line EcoStruxure Building Operation, EcoStruxure Building Expert Environment Building Operation Workstation Building Operation Automation Server SSL SE8000 Cause The SE8000 display does not have a default configuration option to show the CO2 level in the display. A special configuration is needed. Resolution The short message method is the only method possible to display CO2 levels at the moment. Type the following script in the "Description" of any of the lua programs of the SE8000 Room Controller: ME.CSV1 = ("CO2: "..ME.AV28.." ppm") The CO2 reading will be displayed below the date on the SE8000 Room Controller. The string can be found in the "Value" field of the "Short Screen Message Text" point (CSV1)

Issue Required EPROMs for Door Processor Units (DPUs) in I/NET Seven for use with 26-bit Wiegand Pin Pad Customized Pin feature Environment I/NET site Cause What EPROMs for Door Processor Units (DPUs) in I/NET Seven must be used for 26-bit Wiegand Pin Pad Customized Pin feature? Resolution 3.00 (or greater) is required in a DPU to get this feature.

Issue Access Initiated Control (AIC) and Event Sequence (EV, Seq) do not work reliably on site, but the applications work on my simulation test equipment. Environment I/NET site with Access Initiated Control Cause My customer's Access Initiated Control (AIC) and Event Sequence (EV, Seq) do not work reliably on site, but the applications work on my simulation test equipment. Resolution An AIC or an Event is executed once. They are not "re-enforced." An otherwise small communication problem could inhibit the application. So if the control process is critical, use a calculation or module to re-enforce the triggering process. Refer to TCON 237, Calculations, page 7-4 and TCON 236, Direct Digital Control 14-1.

Issue Cannot use analog input (AI) temperature sensor on a 7910 or 7920 DPU Environment I/NET site Cause Can I use analog input (AI) temperature sensor on a 7910 or 7920 DPU Resolution The DPUs do not have analog to digital converter circuitry to translate the signal. It is suggested to use Micro Regulators such as the MR 160 or the MR 88.

Issue Need to add some RTD sensors to a 7716 PCU. I need a P8RTD expansion card. Environment I/NET site Cause  Can I order a P8RTD expansion card? Resolution This expansion card is obsolete. Please refer to the TCON096 for current information on accessories and expansion for the 7716.

Issue Changing an emulated 06 tap ADAA PCU from synchronous to asynchronous communication Environment I/NET site Cause Site is changing an emulated 06 tap ADAA PCU from synchronous to asynchronous communication. Must they change the RS-232 EXP (expansion) card? Resolution It is not necessary to change the RS-232 EXP card. The same card supports Synchronous and Asynchronous ADAA communication.

Issue A message stating the PC's "Resources are Low" is being displayed. These hosts are running Windows 95 and Windows 98. Product Line A message stating the PC's "Resources are Low" is being displayed. These hosts are running Windows 95 and Windows 98. Environment Older I/NET site Windows 95 Windows 98 Cause Older computer running I/NET and Windows OS Resolution Go to Window's Task Manager to find what is running in addition to Windows and I2K. These additional tasks need to be eliminated. Check the performance settings located in Windows Control Panel > System > Performance Tab. Make sure these hosts meet the minimum INET 2000 requirements. Refer to the Getting Started TCON in TCON Number and Title Cross Reference (with links) for specifications.

Issue Difficulty reading the Display Screen on a 7798 SLI back-light is too dark Product Line TAC INET Environment 7798 SLI Cause It is possible to adjust the brightness of the back-lit SLI display screen. The brightness may have been adjusted too low to allow for easy reading of the screen. Resolution Adjust the brightness level using function keys: F7 increases brightness F8 decreases brightness For more information, refer to TCON 138.

Issue The "Active setpoint" in the Display Data screen of the MR ASC displays in red. Environment I/NET Site Cause The "Active setpoint" in the Display Data screen of the MR ASC displays in red. Resolution Make sure Read DDC Lines is Enabled in the Communication Statistics screen of the host.

Issue Error: "No Reply" when trying to connect to a controller on a remote site after dialing in Environment I/NET Cause Error: "No Reply" when trying to connect to a controller on a remote site after dialing in Resolution This symptom can be caused by the wrong settings in the host’s INET configuration profile. Check to see you are using the correct INET profile. Make sure “Dial Link” is NOT selected. (Fortunately, an Integrated NPR Dial profile does not give you the chance to make this incorrect selection.)

Issue When opening (pull up) sunblind, it stops at the end of runtime and then rolls back down. When closing (pull down) sunblind, it stops at the end of runtime and then rolls back up. Environment Lonworks devices including REG-N MSE4 (SVEA 32237-346) Sunblind actuators Cause The sunblinds only have UP/DOWN functions, and there is no panel angle setting. The sunblinds are not venetian, just simple sunblinds. The sunblind actuator is preconfigured for use with venetian blinds. For example when driving down completely first the motor is energised for the time configured in UCPTdownDriveTime, then stops a short moment and then turns the angle of the lamella by energising the motor for the time configured in UCPTpanelTurnTime (dependent on the value of parameter UCPTdownPanelAngle). Resolution When not  using venetian blinds the parameters UCPTdownPanelAngle, UCPTupPanelAngle, UCPTpanelTurnTime and UCPTpanelTurnTimeBottom should be set to zero. Commands to the sunblind actuator then should as well have the value of zero in the rotation part of the SNVTsetting command.

Issue A modem is already connected to a remote site's tap. Settings in the modem need to be changed. Can this be done by dialing into the modem in its present configuration? Product Line TAC INET Environment I/NET remote site communicating via dialup modem Cause The remote site's modem needs to be connected to a PC or Laptop. Resolution No, a modem can not be configured by using its present configurations. Windows HyperTerminal is suggested to edit modem settings.  Refer to TCON 226 (Dial Applications) and TCON 101 (Taps and Repeaters). For emulated tap set up, refer to the appropriate Controller TCON.

Issue PCU/SLI controller went to Boot State after direct connecting a CBL 072 cable from the controller to a PC/Laptop. Product Line TAC INET Environment PCU SLI CBL072 cable Cause Cable connections have most likely been reversed. Resolution The longer of the two female (9 pin) connectors must plug into the PC. The shorter of the two (9 pin) female connectors connects to the serial port of the controller. Label the connectors for future reference. If this does not correct the problem, check the cable wiring or replace the cable. For pin-out information and illustration on how to connect the cable, refer to the appropriate Controller TCON.

Issue Using an I/STAT, what is expected to happen if: During an unoccupied time period the push button override button is pushed The override duration begins The same button is pressed before the timed duration is completed Environment I/STAT Cause Understanding the designed response will allow you to set customer expectations appropriately. Resolution The point returns to its original state and the override is canceled. The override status light is off.

Issue How many software versions of I/NET Seven are there? Part number License Environment I/NET Site Cause What I/NET licenses and what part number are available? Resolution Upgrade orders can be placed using the following part number: P/N: INETSEVEN24U TAC I/NET Seven Software CD TAC I/NET Seven Getting Started - TCON298 Software License Agreements TAC I/NET Seven Software Box New software orders can be placed using the following part numbers: SEVENMAXR - HVAC & Security site license, w/ CD SEVENHVACR - HVAC only site license, w/ CD SEVENSECR - Security only site license, w/ CD SEVENADDHVAC - Add HVAC, site license only SEVENADDSEC - Add Security, site license only SEVENSEATR - HVAC & Security license for 1 workstation, w/ CD, site license required SEVENSEAT3 - HVAC & Security license for 3 workstations, w/ 3 CDs, site license required SEVENSEAT5 - HVAC & Security license for 5 workstations, w/ 5 CDs, site license required SEVENMANUAL - Manual set, 3 volumes. No CD You will be provided with a CD Key only. You can download the installation files or ISO images from the Buildings Business Download Center at the link below. Search for "inet CD" or "inet iso" respectively. https://ecobuilding.schneider-electric.com/search#keyword/tac%20inet%20seven%20software%20cd/tab/documents

Issue With an ASC controller, why does the MCI-Occ point cycle On/Off within 1-minute after pressing the Override button during the after hours schedule. An override period of 60-minutes is being used. Environment I/NET Site Cause With an ASC controller, why does the MCI-Occ point cycle On/Off within 1-minute after pressing the Override button during the after hours schedule. An override period of 60-minutes is being used. Resolution Check to ensure the setup/setback features within a Temperature Control extension (attached to the MCI-Occ point) are not populated. Only use the setup/setback features within the ASC Parameter editor.

Issue What are the general recommendations for LonWorks system architecture? Product Line TAC Vista, TAC IA Series Environment LNS database LonWorks network Vista Server I/A Series MNL Cause Understanding the different communication speeds and optimal site design can lead to improved performance of LON traffic on a network. Resolution There are three levels supported by LonWorks. TCP/IP 1.25mbs high speed backbone 78Kbs FTT-10 level Our recommendation is to maximize the use of TCP/IP, minimize the use of the 1.25mbs high-speed backbone and use a tiered structure of 78Kbs LON segments. The IP provides high-speed data transfer, which is good. The 1.25mbs high-speed bus works fine, but it has a number of special requirements that must be adhered to for proper operation. The flexibility of this 1.25mbs network is limited for the expansion of new Lonworks segments, whereas the TCP/IP is more in line with current building infrastructure making it easier to expand the LonWorks system. In the TCP/IP there are two options that allow for better communications. Standard TCP/IP configuration that will work well for most middle-sized networks. This is standard with NL220 or Lonmaker installations Orion Stack is an improvement on the standard TCP/IP and can poll multiple values at one time helping improve the TCP/IP response on large networks. More information in setting up an Orion stack improved TCP/IP LonWorks network.

Issue What does it mean when a TAC controller is said to have a Universal Input? Environment Xenta Programmable Controllers Xenta I/O modules Cause Universal typically means all types; however, this definition does not apply to TAC Xenta controllers. Resolution With respect to TAC Xenta controllers, the term "Universal" means more than one type of input. It is important that the project planner review the data sheet to determine the exact definition for "Universal" as it applies to any TAC Xenta device.

Issue What network troubleshooting tools are available for use with Lon systems. Environment Vista LON systems Cause Option in tools to monitor error tracking in packets. Resolution We recommend the LoyTec network data analyzer as a very important tool. It is available from Engenuity.com. It is a very user friendly tool that is windows based.