Building Automation Knowledge Base

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 Tap emulation for a Process Control Unit (PCU)? Product Line TAC INET Environment Process Control Unit (PCU) 7716/8 Process Control Unit (PCU) 7756 Cause Need to set TAP Emulation type on PCU  Resolution Using the HHC, press [Code], 90 [Enter] Press [Inc] or [Dec] through 7801, 7803, 7806 Tap emulation Press [Enter] to accept your choice 7801 for direct connection and Integrated dial operation 7806 for direct connect, integrated dial, and ADAA For additional details, please see the following documentation:  PCU 7718 TCON106-0910.book (schneider-electric.com) PCU 7756 TCON127-0910.book (schneider-electric.com)

Issue Using PIN only for the Integration and it is not working. Environment Continuum Version 1.94 and above. Cause The X Driver has a limitation on how it functions with PIN only. Resolution To resolve this issue, DO NOT use PIN only as it is not supported by the X-Driver. If the PIN needs to be used then it must be Card and PIN.

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 Cable needed to Direct connect a Laptop or Desktop to a PCU Product Line TAC INET Environment I/NET site Cause The first asynchronous port (P4) provides an RS232 port for direct connection to a PC or external direct dial (Hayes) modem. The RS232 port’s baud rate is set using the HHC. Resolution CBL072 for a 9-pin PC connection CBL073 for a 25-pin PC connection Refer to TCON 096 For CBL072 information, please refer to Cable Connectivity to I/NET.

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.

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