Building Automation Knowledge Base

Issue Can I place any of the output relays on a 7716 in manual override? Product Line TAC INET Environment I/NET site Cause Manual override for output relays assists in troubleshooting and servicing. Resolution Yes. There are Hand-Off-Auto (HOA) switches for each of the output relays on the 7716. See TCON 096.

Issue If the HOA switch on my 7716 is NOT in the automatic position, can the software alert the host that this point is in manual override? Environment I/NET site with 7716 controllers, or other controller which have the HOA switch. HOA is short for Hand-Off-Auto Cause If the HOA switch on my 7716 is NOT in the automatic position, can the software alert the host that this point is in manual override? Resolution Yes, but the point(s) must be set up.  Example for 0000 DO HOA: Address: 0008 Type: DI/DA Class: Ext Point Name: HOA for 0000 DO Set Number of Bits = 2 Set State Description = AUTO, where State Descriptions are 1 Auto, 2 ON, 3 OFF For DA point, set Normal = Auto For more information, please refer to TCON096

Issue LED number five on my 7716 flashes constantly what does this mean? Environment I/NET Site Cause LED number five on my 7716 flashes constantly what does this mean? Resolution This indicates it is transmitting data to the HHC port. The unit is design to do this even if the HHC is not connected. Read more about it in TCON096

Issue If the 7716 is taken off the LAN what status light indicates LAN Reconfiguration? Environment I/NET Site Cause If the 7716 is taken off the LAN what status light indicates LAN Reconfiguration? Resolution Assuming the unit has not lost power, LED #7. It is Labeled "RECON"

Issue LED number 8 is always illuminated or in alarm state. Environment I/NET Controller Cause It means one or more points are, or were in alarm. Resolution This can be reset by the HHC. If the all points have return to normal, press ALARM ACK on HHC. Press ALARM SUMRY

Issue How do I set the emulated Tap Baud rate in a PCU? Environment I/NET Site Cause How do I set the emulated Tap Baud rate in a PCU? Resolution Using the HHC, press [Code], 91 [Enter] Press [Inc] or [Dec] to toggle PC port baud rates (usually 9600)

Issue How do I set the controller LAN baud rate in a PCU? Environment I/NET Site Cause How do I set the controller LAN baud rate in a PCU? Resolution Using the HHC: Press [Code], 6, press [Enter] Press [Inc] or [Dec] to toggle between 9600 and 19.2KBPS (usually 19200) Press [Enter] to accept your choice

Issue Can I put more than eight, 0 to 20 milliamp sensors on the 7716? Environment I/NET site Cause Can I put more than eight, 0 to 20 milliamp sensors on the 7716? Resolution For more than eight, you need to use a external power supply.

Issue What are the ratings for the output relay contacts on the 7716? Environment I/NET site Cause What are the ratings for the output relay contacts on the 7716? Resolution ? Form-C (SPDT) ? 24V AC/DC at 0.5 amps ? Operating Modes are: ? Latched ? Momentary ? PWM

Issue How long is the battery backup on the 7716? Environment I/NET site Cause How long is the battery backup on the 7716? Resolution The battery backup of a 7716 will last 30 Days. Refer to TCON 096.

Issue Where do I place the RS-232 Serial Expansion Module on the 7716? Environment I/NET site Cause Where do I place the RS-232 Serial Expansion Module on the 7716? Resolution The RS-232 Serial Expansion Module on the 7716 fits into port P2. See TCON 096.

Issue How many Universal Inputs are on the base card of the 7716? Environment I/NET Site Cause How many Universal Inputs are on the base card of the 7716? Resolution There are 8 Universal Inputs (UIs) on the 7716's motherboard. See TCON 096.

Issue Do 7716 inputs have any protection against power spikes? Environment 7716 Cause Protection against power spikes ensure longevity in the controller. Resolution Yes. All inputs on the base card are equipped with transient suppression components.

Issue How do you get the system information of a Xenta Server from a web browser? Environment Xenta Server Xenta 511, 527, 701, 711, 721, 731, 913 Cause View the most up to date system information for the firmware version loaded into a Xenta Server. Resolution Getting system information using a web browser: Menu Utilities-System Information Displays all system information such as software versions etc. Use cut/paste to save information. Menu Utilities-Error-Error-System Error Log Displays system information and all error messages in the system error log. Use cut/paste to save information.

Issue What is PU? Environment I/NET site Cause What is PU? Resolution This allows you to attach a 4-20 mA auxiliary power supply or power converter for a supplementary unit.

Issue On a Xenta 301 controller, what is the 0-10v output impedance? Environment Xenta 301 programmable controller Cause Electric characteristics of the controller can be used to determine if field devices are compatible. Resolution The 0-10v output impedance is approximately 50 ohm, and in the datasheet it supplies maximum 2 mA.

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 Services for assistance. Issue A system Format of the file system will remove all files to return device to a factory condition. Product Line TAC Vista Environment TAC Xenta 5xx TAC Xenta 7xx TAC Xenta 9xx Xenta Server Cause A need to reset to factory defaults exists Resolution These actions clears the filesystem and remove all files and information in it. Make sure you have IP and any other information you need to save from the file system. All files and configurations will be lost. Access Xenta using a serial interface via the RS232 port and a HyperTerminal program. obtain a connection to the dsh> prompt Type format. Wait for formatting to be ready , then enter command setip to enter DHCP enable ,ip-address , subnet mask , default gateway , DNS , local name. Default user/password will then be root/root. Remember to change password. Restart system to accept new ip-address. Install Xenta using the install kit. Use ftp transfer and alternative A (We have just formatted the system). Download WebTool project and user defined files. Update bindings using LonMaker.

Issue Is there a problem with special days in time schedule operations? Environment I/NET Site Cause Is there a problem with special days in time schedule operations? Resolution No, the problem most often is in programming. Our software operates such that if there is a special day defined, anywhere in the system, all other time schedules are affected. If they have no entry for that special day, they will do NOTHING. Therefore, if a person defines a special day in one schedule, they must visit all others and define what they are to do on that day also. If it is an access control system, this applies to both door mode and personnel schedules. Read the release announcement for I/NET 2.44a.

Issue What is acceptable for an earth ground? Environment I/NET site Cause What is acceptable for an earth ground? Resolution It must be a direct electrical path to earth ground. In other words, connecting the controller ground wire to a lug, where earth ground is also connected is ok. Connecting the controller ground wire to a lug in one corner of an enclosure, and the earth ground is on a lug at another corner is NOT OK. That is using the enclosure as part of the electrical path, and not a direct connection. It is NOT acceptable to use conduit or vav boxes as part of the path, either. The same applies for LAN shield grounding.

Issue What is an easy way to check ground connections? Environment I/NET site Cause What is an easy way to check ground connections? Resolution Take a multi-meter in a voltage setting, either ac or dc. Meter from controller ground to lan shield. You should read no greater than 250 millivolts. If you do read higher, go over ground connections to ensure they are good, metal to metal connections