What you need to know about your Emerson Product

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NXa, NXe & NXf Firmware Upgrade

With the introduction of NXa+ in 2006, the Monitor and DSP boards are enhanced to allow flash update of the firmware using the Paramset configuration software. With the introduction of the flash upgradable firmware, all previous firmware releases are combined to provide a single “universal firmware to operate all NX product families, namely NXa, NXa+, NXb, NXe and NXf.

Upgrading earlier NXa products in the field that do not have the compatibility to flash new firmware requires replacing the Monitor and DSP boards, as well as the inter-communication cable P/N 04115885. While either the original DSP or Monitor board can be replaced to rectify a fault, it is recommended that the two boards (plus the communication cable) are replaced together to fully utilize the additional features. For more information, refer to Service Bulletin P24 012.2

If not for the additional features and bug fixed in the new upgrades, UPS will continue to run normally. Enumerated below are the revisions, with the bug fixed and new features.

Inverter Revisions

NXa   Bug Fixes Since Previous Release

Version

No

Bug   Description

Modified   Result

First Release   Update
V1.30 Release

1

 In   V1.20, if UPS is operating under self-aging mode, the inverter overloads when   bypass voltage is high.
This is brought about by invalid PWM pulse width when the pulse width is   beyond the upper limit.		 The   limitation for PWM pulse width is corrected and the self-aging mode problem   is solved.

2

 During   pilot production, the serial communication in DSP is unable to receive   interrupt signal under certain conditions. Monitoring   and resetting measurements are taken to enhance the reliability of DSP serial   communication and the communication problem during pilot production is   solved.

3

 During   the pilot production, UPS occasionally issues an erroneous “Output Fuse   Fail” message.
This is brought about by contact bounce on the micro switch contacts of   output fuses when the battery contactor gets closed.		 The   validation time for output fuse fault is modified from 2ms to 5ms and the   problem of output fuse is solved.

V1.40 Release

1

 When   the bypass/inverter STS is open, the UPS output does not immediately transfer   to inverter/bypass. Switching   of the bypass/inverter STS is immediately detected and output of UPS   instantly transferred to the other side (bypass or invert).

2

 The   following conditions under service mode are considered unsafe: the bypass   breaker must be closed, the output breaker open and the model is powered by   utility through the UPS bypass input.
Safer working conditions require the bypass breaker to be open and the model   powered by outside auxiliary power.		 Under   service mode, the model control circuit must be powered by outside auxiliary   power; the bypass and output breaker must be open.

3

 LBS   slew rate is constant but the slew rate synchronizing the bypass for single   mode can be set. If the LBS master is in single mode, the slew rate   synchronizing the bypass may be high. The LBS slave does not follow the LBS   master immediately even though LBS slave is in single mode. LBS   slew rate is adjusted so that it is equal to the slew rate synchronizing the   bypass.

V1.50 Release

1

 When   LBS master output voltage frequency is near the limit of synchronization   range, LBS slave may be asynchronous. LBS   frequency synchronization range is adjusted to 0.15Hz wider than the standard   upper and lower synchronization limit.

2

 In   the file func.asm, the function tblread cites an erroneous   constant LF1, the correct constant is LF2. However, LF1   and LF2 are both equal to 0. In   the function tblread, the code is corrected to cite LF2 instead   of LF1.

V1.60 Release

1

 The   parallel system locks on bypass due to DC over voltage when the inverter IGBT   short circuits in one module. This occurrence must be avoided for normal   modules to go back online. To   avoid this parallel system locking, the normal module transfers to bypass   immediately and returns to normal mode or blocks its inverter IGBT driving   signals for 10 milliseconds under battery mode.

2

 The   inverter fault confirmation time for an abnormal RMS value is 3 cycles but is   found to be 2 cycles in some cases. The   inverter fault confirmation time for an abnormal RMS value is optimized for   stricter adherence to design consistency.

V1.70 Release

1

 With   Inverter firmware V1.60 or earlier, when one unit in a parallel system is in   overload due to poor bypass load sharing, the system may not transfer to   inverter when attempting to turn on inverters to carry the entire load. This   logic issue is optimized from version V1.70 The parallel system can transfer   to inverter side in this condition.

V1.80 Release

1

 Separate   the bypass SCR short-circuit fault into two sub-faults in the communication   protocol: bypass STS shortcircuit fault and bypass backfeed fault. Only   a genuine backfeed fault will trigger the backfeed protection through the dry   contactor on the U2 board. Both fault conditions will be displayed as   “Bypass STS Fault” in the LCD.

2

 The   inverter shuts down due to DC abnormal caused by an error in DC bus voltage   detection. Added   DC bus voltage calibration for inverter to make the DC bus voltage detection   value of the inverter equal to that of the rectifier.

V1.90 Release

1

 Optimize   the status of parallel system overload. Parallel   system overload is flagged when overload time exceeds 0.8s. The flag   is cleared when condition recovers for a period of 0.2s. This avoids   displaying System   Overload on the LCD panel when sudden increasing large nonlinear loads   are applied.

2

 Optimize   the algorithm of parallel sharing. The   system can effectively suppress the high frequency component of circular   current in some special applications for parallel system.

3

 Optimize   the state of bypass LED. When   the system switches from parallel state to parallel isolated state,   the state of bypass supply is refreshed to satisfy the design of LED.

V2.00 Release

1

 When   the signal of Q5 status has a fault, the UPS switches off the load and   annunciates a “Check UPS output” alarm. Improved   operation if Q5 auxiliary contact fails. When the output auxiliary contact   fails and opens during normal operation, the UPS switches to bypass, and   bypass SCR is enabled.

NXa   New Features Since Previous Release

Version

No

Features   Description

Modified   Result

V1.40 Release

1

 Derate   NXa 120kVA to 100kVA by firmware modification. NXa   120kVA can work as 100kVA UPS by setting the UPS Model through Paramset. In   comparison with the 120kVA model, the 100kVA models have lower overload   points and bypass overcurrent points.

V1.50 Release

1

 Derate   NXa 30kVA to 10/15/20kVA by firmware modification. NXa   30kVA can work as 10/15/20kVA UPS by setting the UPS Model through Paramset.   In comparison with the 30kVA model, the 10/15/20kVA models have lower   overload points and bypass overcurrent points.

V1.60 Release

1

 Modifications   to support field flash serial update function with hardware of new DSP board   (CR0014-04).

2

 Two   bypass frequency protection ranges of ±5% and ±2.5% are added.

3

 Output   over voltage protection is increased in case the inverter current detection   circuit opens.

V1.70 Release

1

 Per   CR040-04, enable a CE to service one module in a parallel system without   disconnecting the parallel signal cables. The   master UPS in a parallel system will announce “Parallel Communication   Fail” error when an output isolator is opened on a parallel system.

2

 Per   CR009-05, add an LBS abnormal warning when the LBS control signal is lost.

3

 Optimized   the input I/O signals validation method. Both “1” status and   “0” status are confirmed.

4

 CAN   communication fault tolerance is enhanced to improve reliability in abnormal   situation such as powering on and off several units in a parallel system.

V1.80 Release

1

 Implemented   CR011 — optimized the contents and descriptions of fault records captured   during a fault occurrence. Triggering conditions and triggering mechanism are   also optimized. This makes the fault data more useful in analysis of site   issues.

2

 Implemented   CR008 — when both rectifier and battery converter turn off, the rectifier   DSP initiates a hardware signal to the inverter DSP that immediately   transfers the system to bypass, improving output voltage.

3

 Optimized   EPO and fault clear logic — the DSP firmware ignores the fault clear command   if the EPO hardware signal is still active. (“Fault Clear” event is   still displayed on the LCD panel.)

4

 The   time interval for inverter auto-restart is shortened from 10s to 1s after the   inverter is shut down due to impact load. This reduces the time of UPS   operation on bypass.

V1.90 Release

 No   new feature implemented.

V2.00 Release

 No   new feature implemented.

Rectifier Revisions

NXa   Bug Fixes Since Previous Release

Version

No

Bug Description

Modified   Result

First Release   Update
V1.30 Release

1

 There   is no “Neutral Lost” warning because of an error code. “Neutral   Lost” warning OK; the rectifier firmware version is updated from V1.20   to V1.30.

V1.40 Release

1

 The   PF may calculate more than 1, reaching 1.01 or 1.02 in some specific states   such as low input voltage and full load. Software   limit the PF, the resulting PF is within 0.00-1.00.

2

 Rectifier   firmware version updated from V1.30 to V1.40.

V1.50 Release

1

 Rectifier   firmware version updated from V1.40 to V1.50.

V1.60 Release

1

 The   DSP fault data can now be recorded, occurring during the mains SCR start up   sequence. The condition initiating the fault data record is now amended to   log IGBT over-current failure, which may occur before normal mode is flagged.
V1.50 and earlier: the rectifier status changes from ON to OFF.		 Correction   to Rectifier DSP fault file recording. Rectifier firmware version updated   from V1.50 to V1.60.

V1.70 Release

1

 DC   over voltage fault may occur due to the energy exchange between the   rectifiers of 2 or more UPS modules sharing inputs when utility fails. To   avoid the occurrence of a DC over voltage due to conditions specified in the   previous column, the rectifier temporarily blocks the corresponding IGBT   driving signals according to the DC bus voltages (i.e., when one of the DC   bus voltages initiates).

2

 If   DC over voltage occurs under the charging status, the “Battery Converter   Fault” appears. The   implementation for battery converter fault confirmation due to DC over   voltage is limited to the discharging status only.

V1.80 Release

1

 During   a mains failure, despite the batteries are still available to support the   inverter operation, the UPS may fail to maintain the critical load on   batteries and shut down prematurely. Rectifier   firmware has been enhanced with the following modifications to overcome this   condition:

  1. Changes in software control to reduce the time to        shut down the rectifier operation when the phase lock loop circuitry        detects a phase lock error for 10ms.
  2. The reference angle of the rectifier current        control loop is adjusted to take only the phase angle of the input        voltage as opposed to the output of phase lock loop.
  3. A fast frequency abnormal detection method is        implemented to reduce the time of abnormal energy back feeding.
  4. Average back feed power is now monitored in a        mains failure; if it exceeds 33% of the rated power in a 10ms period,        the rectifier operation is shut down.

2

 Under   normal battery float charging operation, false “Battery Converter   Fault” alarms can be triggered. The   fault confirmation time is prolonged from 1 min to 3 mins and the charging   control loop is enhanced.

V1.90 Release

 No   corrections implemented.

V2.00 Release

1

 Improve   detection for the status of battery fuses. If   battery fuses are open, Battery   Converter Fault is displayed on the LCD panel.

2

 Optimize   the self-test of battery. When   the Rectifier DSP exits from the battery self-test mode, it clears the   battery self-test command to avoid repeated tests due to the fluctuating   output load.

NXa   New Features Since Previous Release

Version

No

Features   Description

Modified   Result
V1.30   Release

1

 There   is “Neutral Lost” warning when input neutral is lost.
V1.40   Release

1

 The   charge current limitation of Inverter transfer power changes from 20% to 40%.   This means charge power limitation = charger rated power +0.2*   (UPSType-output power) changes to charger rated power +0.4* (UPSType-output   power).

2

 If   two phases of the input current are more than 1.05*Irate and the other phase   of input current is less than 0.3*Irate, “Rectifier Fault” occurs.

3

 If   the temperature of heatsink is over 80 degrees and the battery is charging,   the charge current is limited to 0.

4

 If   the UPS type is 100-120kVA and the system alarm is “Inverter Heatsink is   Over Temperature”, the rectifier is shut down.

5

 If   the UPS type is 100-120kVA and the system alarm is either “Inverter   Heatsink is Over Temperature” or “Rectifier Heatsink is Over   Temperature”, the battery converter is shut down.

6

 The   Balance circuit starts working as soon as auxiliary power is OK; the   parameter is automatically transferred from monitor to rectifier DSP.

7

 If   the actual charge voltage is less than 90% set charge voltage, the actual   charge current is less than 1*UPSType/30(A) and the charge limit current is   more than 2.5*UPSType/30(A), “Battery Converter Fault” occurs.

8

 Perform   twice sampling for mains input voltage per cycle to avoid triggering a   “Neutral Lost” warning with the 7.5kHz signal overlapped on 50Hz   waveform.
V1.50   Release

1

 30kVA   system derated to 10/15/20kVA by software.

2

 AC   capacitance current is compensated and the input current phase lags behind   the input voltage a little; however, the input PF is still above 0.99.
V1.60   Release

1

 The   DSP fault data can be recorded, this occurs during the mains SCR start up   sequence. The condition initiating the fault data record is amended to log   IGBT over-current failure, which may occur before normal mode is flagged.
V1.50 and earlier: the rectifier status changes from ON to OFF.
V1.60: the mains SCR status changes from ON to OFF.

2

 The   mains instantaneous maximum current (RMS) decreases from 1.73 times the   current rating in 2 seconds to 1.50 times in 0.4 seconds.
V1.70   Release

1

 Modifications   to support field flash serial update function with hardware of new DSP board   (CR0014-04).

2

 The   maximum charging power is reduced to 25% of UPS power rating to prevent   thermal failure of battery charger. Thermal design does not support initial   value of 50%.

3

 The   parallel system locks on bypass due to DC over voltage when the inverter IGBT   short circuits in one module. To avoid this parallel system locking, the   faulty module shuts off its rectifier more quickly and the normal module   enhances its back feed capacity to suppress the rising DC voltage rate.
V1.80   Release

1

 Improvements   to the DC bus protection under battery self-testing. If   the positive bus or negative bus voltage is larger than 430V, the UPS will   exit the battery self-testing mode. This can prevent the occurrence of a   possible DC bus over voltage fault when the output load is suddenly removed   during a battery self-testing routine.

2

 Remove   the negative battery voltage calibration, negative battery charging current   calibration and negative battery discharging current calibration parameters   from ParamSet software for NXa.
V1.90   Release

1

 Implemented   CR011 — optimized the contents and descriptions of fault records captured   during a fault occurrence. The triggering conditions and triggering mechanism   are also optimized. This makes the fault data more useful in analysis of site   issues.

2

 Implemented   CR008 — when both the rectifier and battery converter turn off, the   rectifier DSP initiates a hardware signal to inverter DSP that immediately   transfers the system to bypass, improving the output voltage.

3

 Optimized   EPO and fault clear logic — the DSP firmware ignores the fault clear command   if the EPO hardware signal is still active. (“Fault Clear” event is   still displayed on the LCD panel.)
V2.00   Release No   new feature implemented.

Monitor Revisions

NXa   Bug Fixes Since Previous Release

Version

No

Bug   Description

Modified   Result
V1.30 Release

1

 ESP II battery   float voltage Cell change to   group

2

 ESP II version   information Not constant   version
V1.50 Release

1

 Default value of   “Self-aging Inverter Current Percentage Configuration” is 20%. Default value of   “Self-aging Inverter Current Percentage Configuration” is to be   changed to 80%.
V1.60 Release

1

 When two external   battery temperature sensors are installed on the BCB box, removing or   installing sensor on the internal monitor may alarm “Battery   Over-temperature” while the temperature is normal. Add delay time to   2s for internal monitor before initiating this alarm warning.

2

 It will be   considered as a valid equalize voltage when battery voltage reaches 95% of   the setting in V150, which may cause battery to be insufficiently charged. It will be   considered as a valid equalize voltage when the battery voltage reaches 99%   of the equalize voltage setting in V160.

3

 In V150, the month   could be entered as zero through LCD. In V160, zero entry   through LCD is inhibited.

4

 When battery automatic   test is disabled by load condition, the fluctuation on load may start the   battery test and stop the test several seconds later. Add delay time of   30s to confirm if the load is stable to avoid load fluctuations on load   cycling the battery test ON and OFF.

5

 The battery current   limit is calculated as Watt* setting when the battery is a high rated type. The battery current   limit is calculated as Watt* setting when battery type entered is high rate   type.
V1.61 Release

1

 Once remote EPO is   actuated and UPS is isolated if power is then re-applied, the bypass static   switch will enable energizing critical load regardless of the still active   remote EPO . Revised firmware   inhibits bypass static switch operation on reset of control power if remote   EPO is still active.
V1.62 Release

1

 Prevent “On   Battery” alarm during battery test. Modify program to   mask to SNMP communications.
V2.20 Release

1

 Introduced to   provide a common Monitor firmware for all NX products with the introduction   of the flash upgrade Monitor board.
V2.21 Release

1

 V2.20 makes full   use of the 127-byte frame length while the ESP2 used for the communication   options supports only 126 bytes. This results to communication failure with   the Intellicard communication options. V2.21 rectifies the   communication error.
V2.30 Release

1

 The monitor   firmware always reports that ambient temp sensor is installed on the Webcard   even when it is disabled in the Paramset software. Implemented PCR   NX010 — corrected sensor display error on the Webcard. The monitor now   correctly reports whether ambient temp sensor is installed or disabled on the   Webcard.

2

 The monitor   firmware reports a floating value in the Webcard or Paramset when ambient   temp sensor is not installed. Implemented PCR   NX011 — the monitor firmware now reports a fixed value (25 degrees) when   ambient temp sensor is not installed.

3

 Implement PCR NX007   — fix the EOD auto-start in a MMS system when the units EOD at different   times. Corrected firmware   now allows all units in the system to auto-restart.
V2.40 Release

1

 If the system goes   to battery mode for no longer than four (4) seconds, the “On   Battery” status is not captured. V2.40 monitor   firmware increases the priority of the status polling higher than fault data   uploading, ensuring the “On Battery” status to be captured by the   monitor firmware once the system has transferred to battery mode.
V2.50 Release

1

 In the hardware,   interface definition between the U2 board and the BCB Box has changed in NX   480V to be opposite with NXa/b/e/f. Monitor firmware   V2.50 has resolved this issue.

2

 In a Parallel   System, if modules go to battery mode and reach EOD separately (at different   times), unit overload and DC Bus Abnormal   fault may result. DC Bus   Abnormal locks the system out from auto-restarting on return of input   supply. Monitor V2.50 will   also report EOD event if alarms System   Transfer and Unit Over Load   are present while on battery mode.”Auto-restart” also functions on   return of input supply (if the option is enabled via Paramset).

3

 When the monitor   resets or re-powers, Battery Remain Time value is not maintained. Monitor V2.50   corrects the issue (value is maintained in the mentioned condition).
V2.60 Release

1

 Incorrect LCD   messages in Russian and Swedish languages. Implemented CR2049   to correct LCD messages.

2

 NXa/NXa+ units   enter Battery Period Self Test too frequently. Monitor firmware   V2.60 resolves this issue.

3

 There is a   communication issue with HID7 card and the NX UPS Intellislot 2 (Intellislot   1 by silkscreen) — the transmit to receive mask interval during   communication is reduced. Monitor firmware   V2.60 resolves this issue.

4

 Input zero sequence   current is enlarged 10 times when sending to Paramset. Monitor firmware   V2.60 resolves this issue.
V2.70 Release

1

 No new bug fixes   implemented.
V2.80 Release

1

 No new bug fixes   implemented.
V3.00 Release

1

 Battery charge   status information not available externally. Monitor firmware   V3.00 resolves this issue.
V3.10 Release

1

 No new bug fixes   implemented.
V3.20 Release

1

 No new bug fixes   implemented.

NXa   New Features Since Previous Release

Version

No

Features   Description

Modified   Result
V1.40 Release

1

 Add “Frequency   Converter Mode” If user sets   “”Frequency Converter Mode” warning related to bypass,   “Input Neutral Absence” will be disabled and battery capacity can   be set to zero in order to disable “No Battery” warning.

2

 Battery automatic   test and maintenance test 1. When load is   20-100% and battery is fully charged, battery test can be started.
2. 15% rated UPS load will be supplied by battery, the rest will be supplied   by rectifier.

3

 Battery Curve 1. Maintenance   power in battery curve is deleted.
2. EOD is moved from battery curve to “Battery Parameter” in   Paramset.

4

 Range of some items   in “Battery Parameter” 1. Battery Life
2. Battery Temperature Alarm
3. Temperature Compensation Factor
4. Maximum Discharging Time Protection
5. Battery Maintenance Test Interval

5

 Support NiCd   battery In Paramset   “Battery Parameter”, information of NiCd battery can be set.

6

 System Test All LEDs will be   lighted and buzzer will beep in “System Test”.

7

 Interrupt Transfer   remind If user presses   “Inverter Off” button and bypass is “Out of   Synchronization”, the popup message in LCD will be “Transfer with   Interrupt”.

8

 Bypass LED Bypass LED will be   RED if “Bypass STS Fail”.

9

 Add “MBP-T   Cabinet Fans Fault” warning. MBP-T cabinet Fans   Fault

10

 Default value of   “Hot-standby Master/Slave Alternative Operation Time” Default value is   “0”.

11

 Internal battery   contactor If user sets   without internal battery contactor in Paramset in NXa (above 40KVA), the   state of internal battery contactor will not appear.
V1.50 Release

1

 CR19-04—-clients   can set automatic battery discharge test. Automatic battery   discharge can be disabled or enabled through Paramset.

2

 CR18-04—-display   to indicate the primary voltage and the secondary voltage with an output   transformer. Primary voltage of   input transformer will be displayed in LCD data window “TX Input”   if setup item “Input Transformer” in Paramset is “Yes”.   Secondary voltage of output transformer will be displayed in LCD data window   “TX Output” if setup item “Output Transformer ” in   Paramset is “Yes”.

3

 CR16-04—-battery   charge can be set in generator mode. In generator mode,   battery charge current limitation will be changed to user set.

4

 CR24-04—-If   transformers are overheated from any abnormal fault, the cabinet will send   out a signal to UPS to alarm in its LCD display. “Ext Input TX   Overtemp” will appear on LCD if setup item “Input Transformer”   in Paramset is “Yes” and external input transformer is overheated.   “Ext Output TX Overtemp” will appear on LCD if setup item   “Output Transformer ” in Paramset is “Yes” and external   output transformer is overheated.

5

 NXa derate to   10-20KVA—-configuration software (Paramset) to permit derating of the NXa   30 model into 10, 15 and 20kVA models. The capacity of NXa   UPS module can be set to 10, 15 and 20KVA.

6

 CR29—-Some local   codes require that battery charging be stopped due to certain room   conditions. If there is   “Battery Room Alarm”, battery charger will be closed.

7

 Safeguards against   upgrading a unit that was previously derated. The capacity of UPS   can only be derated.

8

 Version Display Base line version   of Monitor, Rectifier, and Inverter are all displayed on LCD   “Version” window. In V140 and earlier, version of inverter,   rectifier and monitor is displayed as “IxxxRxxxMxxx”. In version   V150, version of inverter, rectifier and monitor are displayed as   “VxxxBxxx”. For example, monitor version is “V150B000”.

9

 Dry contact Note: There are   some changes about some dry contacts warning between V1.50 and V1.40 or   before which are listed below:
“ENV”, Battery Room Alarm
“BTG”, Battery Ground Fault
“F_FAN”, MBP-T Cabinet Fans Fault
“T_IT”, Ext Input TX Overtemp
“T_OT”, Ext Output TX Overtemp
The warning will occur with above dry contact “CLOSE” in V1.40 or   earlier, but it will occur with above dry contact “OPEN” in V1.50.   The other warning is the same.
V1.60 Release

1

 The lower limit for   the threshold between equalize and float charge revised to 0.001C in V160.
V1.61 Release

1

 CR41—-Battery   capacity display Battery capacity   display revised to estimated battery time remaining.

2

 CR42—-Rename   “UPS Shutdown” message Alarm message   “UPS Shutdown” changed to “Check UPS Output” to address   user concerns when starting inverter.

3

 CR55—-Add data to   download files Added firmware   revisions and UPS details to history and fault files.
V1.62 Release No features added   in V1.62.
V2.20 Release

1

 This version   implements CR 007-05 in order to change the method of EOD to provide   adjustable EOD voltages for short and long duration discharges as well as   provide adjustable time for each voltage.

  1. Add four parameters in battery management, which        would be set from Paramset: Battery EOD Lower set point (VPC), Battery        EOD Upper set point (VPC), Battery EOD Lower set point time (T1) and        Battery EOD Upper set point time (T1).
  2. Support general battery curve. Specified battery        curve or recommended general curve could be selected though Paramset.

2

 CR0053-04:   Provide a freshening charge function that can be manually initiated with a   return to normal charging after an adjustable time period.

  1. Add two commands into the LCD menu.
  2. Range of adjustable time period is 1 to 36 hours.
  3. Default value is 24 hours.

3

 CR0015-05:   The auto restart sequence, whether set to “Enable” or   “Disable”, shall be ignored and a normal start-up sequence will be   invoked if the system finds its maintenance switch closed.

4

 When   battery over-temperature is detected, the battery charger will be turned off   to protect the battery.

5

 CR019-05:   The default value of Generator Maximum Power is changed from 10kW to 240kW.

6

 To   comply with the latest ESP2 version (Esp2V15.IDL), the ESP2 communication   module is modified.

7

 The   system window of the LCD will only display NX rather than NXa/b/e. In the   version menu of LCD UPS model, information will add the NXa/b/e information.

8

 “DSP   Firmware Error” fault is added to the alarm list. The condition of this   fault is when the Monitor firmware detects an error between the Inverter   firmware and Rectifier firmware. For example, if both inverter DSP and   Rectifier DSP have installed the NXa firmware in an NXa UPS, this condition   is OK and the UPS model line will display “400V-50Hz-a”. If the   Rectifier DSP has the NXb firmware installed, then the Monitor firmware will   report “DSP Firmware Error”; model line will display “208V-50Hz-XX”;   inverter version line will display “Vxxx-NXa” and the rectifier   version line will display “Vxxx-NXb”.

9

 The   default value of kVA is changed from 30kVA to the maximum kVA according to   the model. For example, 120kVA is for NXa, 30kVA is for NXb/e, 200kVA is for   NXa extension and 80kVA is for NXb extension.

10

 Records   for EPO and Fault Clear are independent in the event log. Prior to this   version, records for EPO and Fault Clear are exclusive.
V2.21   Release

1

 No   features introduced with V2.21.
V2.30   Release

1

 Added   support for NXf series UPS.

2

 Added   support for NXb extension series UPS.

3

 Added   support for “Adaptive Capacity” feature (requires Monitor firmware   V2.30) in NXb extension series UPS.
This feature is triggered only by the DSP firmware.

4

 Added   support for “Remote Monitor Panel” communication.

5

 Implemented   CR002-06: Added a new command in the LCD that configures the MODEM at the   UPS-side to “Auto-Answer” mode to support remote commissioning   (requires Paramset V1.11).

6

 Implemented   CR005-06: Added display messages for new events and alarms.
V2.40   Release

1

 Added   support for all features in NX 480V series UPS. Added   display messages for the new alarm of “Input Current Abnormal” for   NX 480V.

2

 Implemented   PCR NX1218 in NX 480V: New UL Fire code regulation requires isolation when   Battery Overtemperature or DC Ground Fault is detected. The firmware has been   revised to detect Battery Overtemperature and DC Ground Fault, and provide a   shunt trip dry contact signal to the NX 480V Battery Cabinet CB, which has a   shunt trip installed. Currently, the feature is only implemented for NX 480V.
V2.50   Release

1

 Add   the output frequency as a default value when the NX series changes. Now,   when NX series changes from NXa to NXb 480, the output frequency will change   automatically from 50Hz to 60Hz.
V2.60   Release

1

 Implemented   CR2159 (Optimize EOD settings):

  • added a third point of (24h, 1.90V);
  • changed the voltage range of the second point from        1.67–1.75V to 1.67–1.85V;
  • third EOD point can be enabled/disabled through        Paramset (disabled by default).

2

 Implemented   CR2007: Modified the interval limit from “5hr” to “0”   when battery maintenance test is performed manually through the LCD Panel.

3

 Added   support for NX 480V 200kVA.
V2.70   Release

1

 Implemented   CR 14206: Changed the default equalize/boost charge and battery capacity (Ah)   settings to help prevent damage to connected batteries if the UPS battery   parameters are not configured properly in the field.(See items #2 and #3 below)

2

 Battery   AH takes a different default value depending on the kVA size of the   equipment. The   default Battery Ah values depending on the kVA size of the equipment are as   follows:

  • 12Ah for 10-20kVA
  • 26Ah for 30-40kVA
  • 40Ah for 60-80kVA
  • 80Ah for 100-120kVA
  • 150Ah for 140-200kVA

For   other sizes the default AH value is 150Ah.

3

 If   equalize charging takes longer than the preset equalize charge protect time,   the battery will be forced out of equalize charge. After   going out of equalize charge, the battery will not enter equalize charge mode   until the battery begins to discharge.
V2.80   Release

1

 Added   Input Current Limitfunction. This function has two parameters:

  • Input Current Limit Allowed – This parameter        enables the Reduced Current Limit feature.
  • Input Current Limit Factor – This parameter sets        the factor between 50% and 200% (default) by which input current is        reduced.

When   the input current exceeds the customer’s setting level, the unit will   transfer to Battery Mode and the monitor should display an alarm signal. The   monitor supports 12 languages. The Monitor Board receives the parameter and   sends it to the Rectifier DSP.

 Allows   the customer to adjust the Input Current Limit Factor using the new   parameters in Paramset V1.16.
V3.00   Release

1

 For   NXa+ units, releases a BCB trip signal when battery EOD.

2

 For   NX 480V units, optimizes the time sequence control of ID device.
V3.10   Release

1

 Implement   PCR NX008:

  • Added enable/disable feature for the Audible        Alarms—Buzzer.
  • Delays the Audible Alarm for about 5 seconds when        an Overload Condition is detected.

2

 Compatible   with Remote Monitor Firmware V3.10.
V3.20   Release

1

 Added   flywheel mode support.

2

 Added   Battery Commission “Reset” into LCD.

3

 Compatible   with Remote Monitor Firmware V3.20.

P24 012.2, Service Bulletin, NXa / NXa+

Flash Upgrade DSP and Monitor Boards
Originator: Gary Shuttleworth 5th May 2006, Revised 14th September 2006

REVISION DESCRIPTION:
Updated table Part Number Details under CONCERN.

CONCERN:
With the introduction of new Monitor and DSP boards with flash update facility (refer to table Part Number Details below) which are backward compatible, care is required when replacing existing first release Monitor and DSP boards in NXa as the replacement DSP board can be programmed for other models. Applying power to the rectifier section during programming checks may result in power component failure. Ensure that the NXa / NXa+ flash upgrade procedure is strictly followed.

If both the DSP and Monitor boards are upgraded, the interconnecting RS485 cable must also be replaced with the revised cable P/N 04115885.

With the introduction of monitor firmware V2.20, the new flash upgrade board is now compatible with all product groups: NXa, NXa+, NXe and NXb. If either board requires replacement, it is recommended to replace both boards with flash capability and the cable to fully utilize the additional features. If the original DSP board needs to be upgraded, take note that NXa and NXa+ spare boards have unique part numbers; each of which is supplied with the latest firmware appropriate for the rating of the UPS. Refer to table Part Number Details below.

As of May 1, 2006, the flash update boards are installed in all NX models.

Part   Number Details

Version

Description

Part   Number
NXa

Part   Number
NXa+
First   Release Boards

DSP Board UHW241U11

03034192

N/A

Monitor Board   UHW241U21

03034193

N/A
Flash   Upgrade Boards

DSP Board UHA241U12

03034192

03034305

Monitor Board   UHA241U21

03034301

03034301

SYMPTOM:
None.

SOLUTION:
When upgrading the boards or installing new firmware, use the flash programming procedures for NXa/NXa+ in TKO so as to isolate power to the rectifier while confirming or upgrading the firmware.

Flash Programming

This is a procedure for upgrading or downgrading the firmware version on the UPS.

The procedure can be only be carried out by Emerson Trained Engineers with TKO license.

TOPTECH Engineering Limited will carry out the procedure free of charge (excluding board replacement) for clients that are on Service Level Agreement (SLA) with them.

Giving a presentation

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Introduction

Recently, the idea of rating presentation came up and now presenters are being rated on the preparation, the design of the presentation, the content relevance, presentation and other rating as may be applicable.

 

I’m aware that some of us here are good orators, but permit me to present to you my presentation on “GIVING A PRESENTATION”

 

Content

  • What is a good presentation?
  • Pitfalls of giving presentation
  • Basic rules of presenting
  • Format of a presentation
  • Key points

 

What is a good presentation

A good presentation is the one that the presenter has an idea of the target audience’s knowledge, and tailored the talk in a way to convince the audience about his / her ideas.

 

A good presentation must be well prepared, such that the presenter must have chosen a topic or theme or an idea that he/she is capable to share. The design of the presentation tool must be simple and the content must be relevance to the audience.

 

Pitfalls of giving presentation

  • You don’t need to impress your audience by making too many points.
  • Don’t direct your presentation to some particular sect of people in your audience. Endeavor to keep the interest of everybody.
  • Don’t use specialist terms or jargons while addressing your audience and if you must use any jargon, endeavor to explain it.
  • Keep abreast the knowledge of your audience on the topic of discuss.
  • Don’t be constraint to speaking too quickly because of time limitation.
  • Don’t be nervous to the extent of speaking too quietly.
  • Don’t result to reading your presentation from a prepared script but instead, connect with the audience and make them involving in the presentation.

 

 

Basic rules of presentation

  • Keep it simple. Don’t pack your talk with information and ideas. Leave ample margins on all four sides with an extra wide margin at the bottom since many in the audience will have their line of sight to the bottom of the screen obstructed. Use a very large font (even for a talk in a small room), if you reproduce printed materials, enlarge it. Don’t use features of PowerPoint that don’t contribute significantly to the presentation. Use color for emphasis but do not overdo it.
  • Make it clear as you can. Explain everything as though to a beginner. Give examples and remember that clarity is much more important than quantity and cleverness. Use keywords and phrases on the slides instead of entire sentences. Make sure to proofread for spelling errors.
  • Don’t read it, talk to your audience. Don’t memorize your talk.
  • Don’t rush it – take your time. Cut materials rather than rush. Restrict each slide to a small number of lines. People come to listen to you talk not to read your slides
  • Use slides to provide the backbone of your presentation. If you need a particular slide more than once in your talk, reproduce it at the appropriate place rather than going back to it.
  • Keep reminding yourself that the audience is not concerned with how clever you are but with how well they can understand what you say. When possible, relate your topic to their fields.

 

 

Format of a presentation

Broadly the same principles apply as when one writes an essay. You workup on outline but instead of writing it out as an essay, you speak it. Your note will be quite similar to an essay outline, but direct and punchy. As with an essay your presentation need:

  • A title
  • An introduction where you set things up so that your audience knows what you are talking about.
  • A sequence of main points
  • A conclusion where you remind your audience of the title and say how you have addressed it.

 

 

Conclusion

I have shared with you what is a good presentation, pitfalls of giving presentation, some basic rules of presentation, and format of a presentation.

Just before you go, have these tips:

ü  When you make a presentation, keep it simple and make it as clear as you can.

ü  Use examples to give your audience rock on which to anchor their thoughts.

ü  Make your slides do the work of presenting your main points so that your mind is free to focus on communicating with your audience.

ü  The day before, practice going through your slides and practice relaxation.

ü  Check the equipment and make yourself feel at home.

ü  Take your time.

ü  Remember your audience doesn’t care how clever you are- they just want to be able to follow what you say.

 

THANKS