Building Automation Knowledge Base

Issue Add a stand-alone 7798 to the existing controller LAN Environment I/NET site Cause How to add a stand-alone 7798 to the existing controller LAN Resolution A CLX card is required. Refer to TCON 138.

Issue Sequence zero does not run when power is restored to the Micro Regulators (MR). The MRI is on a UPS in another part of the building and never loses power. Product Line TAC INET Environment MicroRegulator (MR) SubLAN devices MicroRegulator Interface (MRI) Controller LAN Interface Cause By design, sequences are stored in the MRI. Sub-LAN controllers do not store sequences. Resolution Sequence zero is designed to trigger the power restore event (Sequence 0) in the event of the Interface (MRI) power failure being restored, hence the MR will not trigger this sequence 0 in the MRI.  The action is correct.

Issue I never reset the "Sync" LED on the FOI after I corrected the line fault on the output of the CRR. Will this cause any communication problems? Environment I/NET CRR Cause Line Fault Resolution Reset the sync LED If you can NOT extinguish the Sync LED you should find the fault. Leaving this light “on” does not cause communication problems.

Issue ADAA problems: can not dial in or out of the site A PCU is set up as a 06 TAP. The RX and TX LEDs are flashing on the RS-232 card. A CBL048 cable is connected from the RS-232 card to the modem. The RD and SD lights are flashing. Environment ADAA Cause The wrong BIN file is in the PCU. Resolution You have the wrong BIN file in the PCU. If the PCU is at the “Boot State”, you may have the wrong EPROM too. Install the correct BIN file; and it is strongly recommend to put in a compatible Asynchronous EPROM.

Issue Controlling AC relays from analog outputs on the motherboard or expansion board of the 7718 PCU Environment I/NET Site Cause Controlling AC relays from analog outputs on the motherboard or expansion board of the 7718 PCU Resolution The outputs from these locations are DC. This may cause the AC relays to “chatter” or not work at all. It is recommended to use a P8UI8DO at the expansion board or place DC powered, form “C” contacts, pilot relays on the outputs of the PCU. Refer to TCON106 for more details.

Issue Door show Deny Entry Schedule after deleting a special day schedule on the special day Environment I/NET Access Control Cause The process to execute the Special Day begins at midnight on the first day of the duration, and ends at the end of the last day of duration. If you delete the Special day while it is running you will get denied entry. Resolution Do not Delete special Day schedules on special days Modify the special day schedule to match the desired access control results. On the next non-special day, Delete the schedule If you have already deleted the special Day or special Schedule Option A - Delete the special day from the Host and the Controller     Perform a station restore to force the controller to use the current programming Option B - Determine which special day schedule type the controller is operating on Modify or create a schedule for that special day with the desired access privileges On the next non-special business day, enter the desired programming for special days.

Issue Docutrend data import fails while connected to a physical 78010 tap. Environment I/NET site Cause Docutrend data import fails while connected to physical 78010 tap. Resolution The system or hardware number in your active profile is different compared to the 78010 tap. Change the profile to match the site 78010 tap.

Issue In addition to a card read, add fingerprint verification before access is given. What kind signal is required from this third party device to the DPU? Environment I/NET Access Control Site Cause In addition to a card read, add fingerprint verification before access is given. What kind signal is required from this third party device to the DPU? Resolution DPUs require a 26-bit Wiegand format.

Issue Does Configuration Server for an i.Lon 1000 have to be running all of the time? Environment i.LON 1000 Cause The Config Server provides the path for communication to the iLon when used as an RNI. Resolution If using the i.Lon 1000 as an RNI to communicate with the LonWorks network, then the Config Server must be open.   If the i.Lon 1000 is being used as a router (not RNI), it is not necessary to have Config Server running unless you are in the configuration process for the router.

Issue Is it possible to have a Dial Network and LNS Network in the same Vista Network? Environment Vista Network Dial Network LNS Network Cause  A dial up network communicates via the PC comport directly (no LTA driver), therefore there is no conflict with LTA card drivers (like the conflict that occurs between Classic and LNS networks). Resolution There is no problem having both types of communication in a single Vista network.

Issue When connecting the RoamIO-2 service tool directly to a standalone BACnet b3 controller which is not connected to the MSTP network yet, the RoamIO-2 does not show the b3 controller on the screen. Environment RoamIO-2 Continuum SmartStruxure BACnet b3 controller Cause By default, the View option of the ROAMIO2 Bacnet Service Tool is set to view "By Network".  Resolution Connect the RoamIO2 service tool directly to the b3's service port. Launch the BACnet Service Tool and in the 'View' menu de-select 'By Networks' and 'BACnet Only' menu entries. Click the green icon to connect. Now, it will show the b3 controller in the service tool.

Issue When will the connection in a Dial network disconnect? Environment Xenta 901 Cause The 901 connection will continue as long as live values are being viewed. Resolution If the Status window is open (for example), the connection will continue until that window (and any other window viewing live data) is closed.

Issue Using the Xenta 511, will value pages only show temperatures in Celsius? How do you get them to display in Fahrenheit? Environment XBuilder Cause Regional settings can be project wide or per point. Resolution When creating a new TAC Xenta 511 project, select to use US values. You can also select conversions to occur per object.

Issue Is it possible to have multiple Xenta 901 controllers from multiple sites in a single LNS network and access the remote sites as needed? This would leave any controllers not connected offline. Environment TAC Xenta 901 LNS Network Cause TAC Xenta 901 is an "LTA" and in TAC Vista there can only be one per LonWorks network. Resolution Create one LNS database per TAC Xenta 901. You can have up to 240 TAC Xenta 901 networks per TAC Vista Server (all can dial up the same TAC Vista Modem(s)). Add another TAC Vista Server if you need more dial up connections.

Issue Need a wiring diagram of the breakout box connections between the Reader and the 7910 or 7920 DPU. Product Line TAC INET Environment I/NET site Cause Need a wiring diagram of the breakout box connections between the Reader and the 7910 or 7920 DPU. Resolution Recommend you look in TCON 112 (Readers) for illustrations the match your requirements. Check for TCON Number and Title Cross Reference (with links).

Issue How to adjust the illumination level on the 7798 (B) Environment I/NET site Cause How do you adjust the illumination level on the 7798 (B) Resolution Function Keys F7 increases the level; F8 lowers the level. Older 7798s do not have this feature.

Issue Conversion coefficients values for the Setpoint Adjustment Dial on a 7200 UC Environment I/NET site Cause Need for conversion coefficients values for the Setpoint Adjustment Dial on a 7200 UC Resolution M = 0.01666; B = -2.1333. The resolution counts range is 68 to 188.

Issue How to remove the "Y" selected in the Alarm Inhibit Editor Environment I/NET site Cause How to remove the "Y" selected in the Alarm Inhibit Editor Resolution This node may not be saved in the workstation’s Network Configuration Editor. First save this device in network configuration, then attempt to modify the settings in the Alarm Inhibit Editor. Refer to TCON 237 Alarm Inhibit (AI)

Issue PCU Analog Outputs to transducers do not have consistent performance. The first voltage-to-pneumatic transducers installed worked fine. Additional transducers have been added; and now, none of the transducers operate properly. Environment PCU Voltage-to-Pneumatic transducers Cause The amperage or power draw limitations of the PCU have most likely been exceeded. Resolution Sum up the total current and / or power draw of all the transducers and compare this to the maximum current or power output of the PCU. Reduce the number of transducers to stay within the limitations.

Issue MR 160 resets every minute. It is the only sub-LAN controller resetting. Replacing the hardware has no effect on the resetting issue. Environment MR160 Cause Station conflicts can cause this behavior. The MR 160 is unique in that it uses two consecutive addresses on the subLAN and is designed for inputs only. The MR 160 provides no output points or MR-resident DDC modules. Resolution Make sure there are no station address conflicts. Make sure the database has not violated the specifications for inputs only. Refer to TCON 126 for more information.