Building Automation Knowledge Base

Issue Do the MRs have the ability to run a time schedule without a MRI, MCI or I/SIT LAN? Environment I/NET MRs Cause If communications are lost to the MRI, MCI, or LAN, a stand alone time schedule will continue to work at the controller level. Resolution Yes, you can build a Standalone ATS in the MR functions editor or I/STAT. Standalone ATS (Automatic Time Schedule) is an MR-resident ATS schedule programmed into the MRs that allows a single start stop time for each day of the week for the point designated as the master Device Control point in the MR Parameters editor. These commands are only issued if the MR and MRI/MCI are NOT communicating. Refer to our System Operator Guide TCON 207 or TCON 236 for more details.

Issue Is there a list of hardcopy forms or worksheets that can be used to develop data-trails for Job Projects? Environment I/NET System Design & documentation Cause These forms can help in the process of design, checkout, and as-built documentation. Resolution TCON 157 "Forms and Worksheets" contains I/NET Building Automation forms. You will find forms to set up Sensors, Controllers, Actuators, Docutrend, DDC, Time schedules, ASC Parameters, UCIs and UCs, and more in this TCON.

Issue Protect DCUs and PCUs from sensors shorts Environment DCU PCU Cause If Distributive Control Units (DCUs) and Process Control Units (PCUs) have sensors in critical areas and one of the sensors shorts, it may affect the readings of the other sensors on the controller. Resolution Isolate the input signal into the controller: Add an in-line 20 milliamp fuse or circuit breaker Use an Isolated DC to DC transmitter. For an example of such a device go to the Kele 2000/ 2001 Parts Catalog, model DT13, or go to their web site www.kele.com, or call them at 901-937-4900, International 901-382-6084.

Issue What are the dip switch settings for each Fiber Optic Interface (FOI) in I/NET 2000 Controller LAN and subLAN? Can FOI communications be alarmed? How do you test them? Does the FOI need to be addressed in I/NET? Environment I/NET 2000 Fiber Optic Interface Cause Configure the network to work on FOI. Resolution Controller LAN Settings: SubLAN Settings: 1 = Off 2 = Off 3 = On 4 = Off 5 = Off (If no CRR) 6 = Off 7 = Off 8 = On 9 = Off 10 = On 11 = On 12 = On 1 = Off 2 = Off 3 = On 4 = Off 5 = Off (If no CRR) 6 = Off 7 = Off 8 = On 9 = On (9600 subLAN speed) 10 = On 11 = On 12 = On Notes: When testing the fiber optic section of the network, tests can be done in "Single-Mode" or "Multi-Mode." All testing must be performed in "Multi-Mode." Fault alarms can be sent from the FOI to a remote location using fiber line faults. You need to have Counter Rotating Rings (CRR) to get this feature. FOIs are not addressable. The FOI is transparent or invisible when viewed through a workstation or viewcon screen of the 7728 or 7798. Refer to TCON087, Fiber Optic Interface for more details.

Issue Can I edit the configuration of Site Tap, 78061, or an emulated 06 Tap through a host tap (direct) connection? Environment 78061 Site Tap Emulated 06 Tap Host Tap connection Cause Being directly connected to a system and wanting to make changes to the site tap. Resolution No. You must dial into these site taps to update their configurations.

Issue Exporting files works fine from I/NET 2000 1.XX, but when Reporter is making a report, an  "Active X" error message is displayed. Environment I/NET 2000 Cause The ODBC driver or its toolbars has been corrupted.  Resolution In the PC's registry, delete the toolbars and restart Exporter / Reporter. If this does not fix the problem then re-install the ODBC driver. If you are running an I2K rev 2.xx you have to re-install I2K too. WARNING: Modifying the registry can damage the operation of the workstation if done incorrectly.

Issue Inputs on PCU are consistently reading too low Environment I/NET Cause There may be a short on one or more of the inputs or the power supply may have a problem. Resolution To check for a short in the inputs: Remove all the inputs Place one input back on the PCU Check the point value If it is normal, install and check the next input. Repeat through all inputs In summary, a short in a sensor's input to the PCU will affect all inputs on that bank.

Issue A 7700 and a 7740 are running DDC modules in I/NET 2000. Both DCUs have EPROMs (Non-MIPed). A "P-only" PID does not work. Environment I/NET 2000 Non-mipped EPROM Proportional-only PID control Cause P-Only mode is not available in the EPROM versions of the 7700 and 7740 DCUs. Resolution Use MIPs in these controllers to get this feature. Refer to TCON 206 or TCON 237, Direct Digital Control for more information.

Issue CALC is not an option in the DDC editor of a 7700 or 7716. Environment DDC Editor 7700 7716 Cause The Calculation module exists only in MR controllers and ASCs. Resolution Use the DCU or PCU Calculation editor. Refer to TCON 209 or TCON 237 for more details about Calculations and DDC modules.

Issue What is a Parent Point in a UC (Unitary Controller)? Environment Unitary Controller Cause Feature information Resolution A parent point is nothing more than the AO or DO point to which you add a UC extension: VAV, AHU, PID, FLT, or HPMP. The functioning of the extension is directly tied to the state of the parent point and the command pairing. Refer to TCON 209 or TCON237 for important details.

Issue What editing actually resides in the UC (Unitary Controller)? Environment UC (Unitary Controller) Cause Not all programming capabilities are available in all controllers. Resolution The following editors reside in the UC: Station parameters Control Commands Conversion Coefficients Resident I/O points Unitary control VAV-UC extensions AHU-UC extensions HPMP-UC extensions UC-PID extensions UC-FLT extensions Refer to TCON 209 or TCON 237 for important details.

Issue What is the difference between an Internal Analog Input (AI) and Pulse Input (PI) when it comes to fractional digits? Environment I/NET 7700 Cause It is not always clear the difference between Internal AIs and PIs when it comes to fractional digits. A clarification note will be added to the next release of the I/NET 7700 Operator Manual, but until then, please adhere to the following when you want to display fractional digits for either Internal point types. Resolution Internal Analog Inputs (AIs) Internal AIs are limited to a maximum value of 2 16 (65535). Internal AIs fractional digits are a direct result of the M value in the conversion coefficient table. If you want to display a value in hundredths (x.xx) the M must be .01 and the B=0 and the highest number to be displayed is 655.35. If you want a number to display a value in tenths (x.x) the M must be .1 and the B=0 and the highest number possible is 6553.5. Internal Pulse Inputs (PIs) Internal accumulators can accumulate not only pulses but analog values as well, but when it comes to fractional digits Internal PIs are completely different from Internal AIs. PIs are a floating point type number. This means there is no limit to the magnitude or the number of fractional digits, except that only 6 significant digits may be displayed at any one time. Therefore, the fractional digits are not ruled by the number of decimal places of the M value in the conversion coefficient table. In fact, for a Internal PI to work properly, you must utilize a conversion coefficient pair of M=1 and B=0. An Internal PI with a calculation of P0+P1, where P0 and P1 are External AIs with values of 34.1234 and 72.5678, would be able to display the 4 decimal places with no trouble. In fact, if you used a conversion coefficient of M=.0001 and B=0 for the Internal PI, and the AIs never changed their value, the Internal PI calculation would start rounding off the value every calculation. This rounding effect would in fact be shown by the value of the Internal PI getting smaller and smaller with every scan of the Internal PI. Remember, for a Internal PI to work properly, you must utilize a conversion coefficient pair of M=1 and B=0.

Issue How I/NET 2.3X has the ability to designate a particular host to do an automatic restore Environment I/NET site Cause How I/NET 2.3X has the ability to designate a particular host to do an automatic restore Resolution Go to the host’s Network Configuration/Link Summary. Highlight the desired row. In that row you will find a column labeled “R/H”. This stands for Restore-Host. Modify this row. In the Restore Host prompt, place the same host number you entered in the host’s active Configuration Profile. (Don't forget to make sure that host has current save files!)

Issue Are there resources for configuring a 7750 Building Manager? Product Line TAC INET Environment I/NET site Cause The Building Manager (BM) is based on a zoned programming approach. Zones are groups of points in a system which control related equipment. A good example of a zone would be a group of points that control the lighting, heating and air conditioning for a tenant that occupies 1 floor in a multi-story building. The major function of the building manager is to give the tenant control over this equipment (through a user friendly telephone interface) and to be able to accumulate statistics to be used for billing normal and after-hours energy usage. Resolution Good sources: TCON098 TCON209 (7-28 through 7-38) TCON237 (7-28 through 7-39) Tech Tip 038

Issue Set up a two wire LTS80 Lini-Temp sensor on a 7740 and 7741 DCU. Environment 7740 DCU 7741 DCU LTS80 Lini-Temp sensor Cause Conversion coefficients must be set properly for correct reading of temperatures. Resolution For Fahrenheit: M = 0.17582 B = -279.4 For Centigrade: M= 0.09768 B = -173.0 Refer to TCON 097 for 10K resistor placement

Issue How can I view the routing table on a host that is part of a network using TCP/IP? How can I remove entries in the host's routing table? Environment I/NET Host IP Network Cause Troubleshooting IP communication often involves viewing the current routing tables at a host station. This will help determine if they need to be cleared. Resolution View the Host Routing Tables  Go to Start > Run > and type "cmd" to open a DOS screen Type "route print" and hit Enter Delete an entry from the Host Routing Tables Example to delete address 157.0.0.0: Go to Start > Run > and type "cmd" to open a DOS screen Type the following: route delete 157.0.0.0 and hit Enter Type "route print" and hit Enter. This address should not appear. 

Issue Limit what is available to the user on a dedicated I/NET host on the Ethernet. For example, I do not want the user to be able to get to a DOS prompt then modify the Routing Table. Environment I/NET site Cause Limit what is available to the user on a dedicated I/NET host on the Ethernet. For example, I do not want the user to be able to get to a DOS prompt then modify the Routing Table. Resolution This can be done. Remove the DOS icon from Windows. Or, it may be better to edit the permission rights of the user.

Issue On Screen Indication of a Telnet session into a NPR Environment Telnet NPR Cause Indicating to the user when a telnet session has been initiated into an NPR. Resolution "CSI NetPlus Router Telnet Server" "Connected to remote NPR” (Name of the NPR) followed by version number, build, and date "Type help for a list of commands"

Issue How to add entries in the host’s routing table Environment Command Prompt Cause Routing Table Errors Resolution As an example: add the address 157.0.0.0 Go to a DOS screen and type the following: Route add 157.0.0.0 Then type: Route Print This address should appear.

Issue Site has a I/NET 2000 PCU set as an 06 TAP for ADAA, and the PCU has a synchronous EPROM and synchronous BIN file loaded. Do they need to change the EPROM and BIN file to Asynchronous if they install an integrated dial modem on the serial port of the same PCU? Environment I/NET site Cause Site has a I/NET 2000 PCU set as an 06 TAP for ADAA, and the PCU has a synchronous EPROM and synchronous BIN file loaded. Do they need to change the EPROM and BIN file to Asynchronous if they install an integrated dial modem on the serial port of the same PCU? Resolution No, but you do need to use the correct modem, cables, settings, profiles, etc.