More Errors & problems trying to Fix TEC N2 Thermostat(s) with a FX40 Supervisory
After following the JCI Product Update Bulletin PU 07-07 that is suppose to correct several problems with TEC N2 Networked Thermostat that have points slow at updating, intermittent comm loss, random alarms, and points randomly commanding to different values (from auto to on etc.. , & Various Sensors & Set points values randomly go from a their normal value to show
I tired to follow all the Information Povided By DDCFreak-
The FX Controllers are not self-terminating. Therefore, be sure to install 220 ohm end-of-line resistors (EOLs) as specified in ASC and N2 Bus Networking and Troubleshooting Guide Technical Bulletin, LIT-6363003, N2 EOL Termination section.
Details:Additionally, check the following items unique to FX40 N2 networks:
1) Observe the recommended maximum 1000 point limit per FX40 (this is the sum of all N2, LON, BACnet and Niagara points, see SDB 040522066005465: "How do I count the current number of points defined in an FX40?"
2) Ensure that the FX40 is running the latest jciN2.jar file. This can be determined by opening the Software Manager in FX Workbench Pro - all software modules in an FX40 v1.2 should be at 3.0.106 (for FX40 v1.0 or 1.1, jciN2.jar should be 184.108.40.206).
This version of the jciN2.jar file incorporates features that demonstrably improve communications to TEC, DX9100 and VMA controllers.
Internal Notes FSC Only: In response to some complaints of poor N2 performance, Steve Michals has produced an updated jciN2.jar 220.127.116.11 which incorporates the following new features:
- modified handling of negative acknowledge (NAK) errors which are common with TECs; the updated behavior is more consistent with N2 driver behavior in NAE and N30.
- immediate read-back of values following an adjust command (instead of waiting for the entire poll cycle to read a point's value); this is in response to user complaints that setpoint adjustments are not promptly reflected in the graphic or text screens of the FX40
3) On projects with N2 TECs, communication was improved by the addition of a 0.047 microF capacitor at each end of the N2. In instances where the typical 220 EOL resistor is already in place on the N2, these capacitors would be wired in parallel with the EOL.
Instead Things did not improve - In part probably not being able to update the Jar files due to Error message I get when trying to update the Jar files
as recommended Please see attached info on all the issues I am running into --Help with any or all thses issues is greatly appreciated...
Thank You, Chet