RPS, Technical information, IT-HIST-S3T DSP-075.
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Subject: Firmware history for systems S3T-S3M.
M. Ghirelli, Date: 06/08/25
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Modification category:
B=bug fix
C=critical bug fix
I=improvement
N=new feature
T=technical

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FW075-0131: S3T-S3M_0131.hex     [03/07/2025] CRC32:[C54EB546] Standard production

I   - Increased filter time for battery overvoltage diagnostics when switching from charge
      to floating state (to avoid false warnings [F19] and [F20]).
I   - Increased resolution of the manual bypass switch debounce filter, to avoid false
      signals in case of auxiliary contact problems.
I   - Added management of the parameter "Power walk-in start delay" to make mains return
      verification time configurable.
T   - Added check for "SEQ_BUSY == 0" before generating the "OMNG_UNLK" pulse.
T   - Added a redundant safety feature to the battery charger current limitation
      calculation to avoid the possibility of out-of-range value.
T   - Filtered diagnostics "[F52] Battery Contact Locked RL2" during the initialization
      phases and up to the STAND-BY state (only for the S3T/S3M 10-20kW model).
T   - Added an initial fan speed-up phase (2sec) to compensate for the change in minimum
      speed reduction.

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FW075-0130: S3T-S3M_0130.hex     NOT RELEASED

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FW075-0129: S3T-S3M_0129.hex     [04/04/2025] CRC32:[F2F76686] Standard production

Note: NOT RELEASED FOR STANDARD PRODUCTION

N   - Added mixed mains/battery absorption function depending on the input frequency value
      for a special application.
I   - Added output contact configuration for "Start ICB reduction" and "Start Share"
      signaling (special function).
I   - Increased ICBAT-Max saturation to better manage a number of batteries greater
      than 21+21 in the second level charge phase.
I   - Added backfeed test mode configuration to ensure full compatibility in case of
      special loads.
B   - Fixed a bug in the communication protocol (R/S command) that in some situations
      could cause a false overtemperature alarm.
T   - In ECO mode, the request for inverter intervention due to VOUT control must also
      be made by the slaves. Currently, slave UPSs request intervention only for MIN_R
      control.
T   - Introduced BYP_FLAT check for one of the backfeed test triggers to make the system
      more filtered.
T   - Improved the logic of the additional regulator during the backfeed test.
      Now it remains active during this phase.
T   - Increased the additional regulator gain corresponding to 100% from 0.6 to 1.0.
      This allows for higher default values of the "Resonant scale" parameter from
      100% to 167%.

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FW075-0128: S3T-S3M_0128.hex     NOT RELEASED

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FW075-0127: S3T-S3M_0127.hex     NOT RELEASED

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FW075-0126: S3T-S3M_0126.hex     NOT RELEASED

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FW075-0125: S3T-S3M_0125.hex     [03/05/2024] CRC32:[1B57DDFE] Standard production

Note: NOT RELEASED FOR STANDARD PRODUCTION

N   - In case of UPS configured for Naval use, it's now possible to customize the model
      of any input and output transformers.
I   - In case of UPS configured for Naval use, the [A60] and [A61] signals are excluded
      from the "Any alarm" condition.

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FW075-0124: S3T-S3M_0124.hex     [25/03/2024] CRC32:[147DE4E6] Standard production

I   - Improved the power recirculation mode controller, to reduce input current
      absorption.

B   - In case of UPS in parallel and without batteries, if the System has a totally
      shut down of the input mains of both UPS, both UPS show the message "Load Off"
      and of course, we loss the output voltage, but if before that the UPS are
      completily off the input mains returns, both UPS don't restart by itself.
      It is necessary to restart manually both UPS with the panel command.

B   - If during a shutdown with absent input voltage, the mains returns before the
      time expires, at the end of the time the UPS output always remains on and the
      correct procedure of switching off, waiting for 10sec and switching back on is
      not carried out.

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FW075-0123: S3T-S3M_0123.ehx     [11/09/2023] CRC32:[5C954694] Standard production
FW075-0123: S3T-S3M_0123.hex     [11/09/2023] CRC32:[C8DED60F] Standard production

I   - Improved Input contact fault detection.
I   - Improved Battery charger short circuit detection.
I   - Improved Backfeed check.
I   - Added 10s delay before start.

B   - Fixed bug related to Latch bypass detection when redoundant Latch bypass
      configured and not active.
B   - Fixed bug related to start when mains 3 phases are detected and are good.
B   - Fixed bug related to start from battery.

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FW075-0122: S3T-S3M_0122.ehx     [20/06/2023] CRC32:[29A2688D] Standard production
FW075-0122: S3T-S3M_0122.hex     [20/06/2023] CRC32:[A2719414] Standard production

I   - R/X command (Gpser protocol) extended to all serial ports,even for slots.
B   - Fixed bug that did not allow the UPS to turn on in the event of an active
      external SWMB (false latch bypass condition detected).
T   - Normal UPS start and auto-restart has been disabled if one or more input
      grid phases are missing.
T   - Tuning of measurement routine enhancing calculus model (fine tuning filters
      capacity value).
T   - Threshold backfeed current set to 0.025 p.u.
T   - Long timeout Battery Overvoltage control increased from 2 minutes to 4 minutes.

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FW075-0121: S3T-S3M_0121.ehx     [16/01/2023] CRC32:[82F58839] Standard production
FW075-0121: S3T-S3M_0121.hex     [16/01/2023] CRC32:[33243BF2] Standard production

N   - Added Management fault fan for a specific fan hardware autodetecteded.
T   - Power derating up to 10% of nominal power.

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FW075-0120: S3T-S3M_0120.ehx     [23/11/2022] CRC32:[DADA85DD] Standard production
FW075-0120: S3T-S3M_0120.hex     [23/11/2022] CRC32:[067F22D1] Standard production

N   - Added simplified algorithm to estimate and shows on display the input 
      voltage of a transformer eventually connected on the UPS input. The 
      feature is available selecting appropriate input transformer model via 
      S3Config software (min rev. XXXX).
N   - Added new UPS output transformer model selectable via S3Config software
      (min rev. XXXX).

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FW075-0119: NOT RELEASED FOR STANDARD PRODUCTION

N   - First release for the special model S3T 12kW In/Out 200Vac - Transformer
      without neutral (AF U 1862).
N   - Added simplified algorithm to estimate and shows on display the input
      voltage of a transformer eventually connected on the UPS input.
I   - Added new UPS output transformer model 0TCU0059B (400V-200V, 50Hz)
I   - Added new UPS input transformer model 0TCU0078B (200V-400V, 50Hz)

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FW075-0118: S3T-S3M_0118.ehx     [20/05/2022] CRC32:[4CCE9EDB] Standard production
FW075-0118: S3T-S3M_0118.hex     [20/05/2022] CRC32:[D876B3AA] Standard production

N   - Added two new trigger events for output contact: "High voltage on dc bus"
      and "Very high voltage on dc bus". To configure this output mode is required
      the S3Config software release 3.0.5 or later (parameter Remote I/O:Output mode).
I   - Increased the time in the DC bus overvoltage control ([L06] and [L07] alarms;
      voltage range 430Vdc-450Vdc) from 4sec to 10sec.
I   - Modified the CSS intervention threshold from 80% to 85% of the nominal output
      voltage value, to comply with the new standard.
I   - Improved the management of lithium batteries to force recharging, when the
      power supply returns, even if the BMS has disconnected the batteries after a
      complete discharge.
B   - Fixed a bug on reporting "[F13] Boost voltage error". In previous releases
      in case of booster error, the code "[F25] Power absorption" was always
      indicated instead of the correct code [F13].
B   - Fixed a bug on the "Power walk-in duration". In previous releases the duration
      of the function was 90% of the set value.
B   - Fixed a bug on the option "Buzzer mode:Reduced". In previous releases this mode
      was not working properly.
T   - Added the compatibility with the alternative model of input board 8UB0452-01A.
      Management of different types of temperature sensors and temperature thresholds.
T   - Changed the default value for the parameter "Resonant scale" from 43% to 60%.
T   - Optimized the management functions of the RTC.

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FW075-0117: S3T-S3M_0117.ehx     [30/11/2021] CRC32:[AD205AC2] Standard production
FW075-0117: S3T-S3M_0117.hex     [30/11/2021] CRC32:[48A0A362] Standard production

N   - Management of Ni-Cd batteries. To configure this batteries type is required
      the S3Config software release 3.0.4 or later (parameter Battery:Battery type).
      Due to different models of Ni-Cd batteries, is necessary to verify with our
      presale service the compatibility between the batteries you want to use and
      the battery models managed by this firmware release (parameter Battery:
      Battery model).
T   - Improved the management of the input and output power sections in the phase
      of production test.
T   - Changed the meaning of the char04:bit02 in the "RX" command. Now it represents
      the state of the battery charger relay.
T   - Management of battery voltage measurements in the serial protocol ("RX" and
      "DS" commands) in case of UPS without batteries.

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FW075-0116: S3T-S3M_0116.ehx     [15/10/2021] CRC32:[2077DE4C] Standard production
FW075-0116: S3T-S3M_0116.hex     [15/10/2021] CRC32:[367AAE2D] Standard production

N   - First release for the new models Sentryum with SuperCaps (P/N code SC,C5,C6,
      C7 e C8).
N   - Management of the number of batteries different from the standard 20+20.
      It is now possible to use different battery configurations from 21+21 to 22+22
      and from 15+15 to 19+19 (with power reduction).
      To configure the batteries number is required the S3Config software
      release 3.0.3 or later (parameter Battery:Batteries number).
N   - Management of lithium batteries by interfacing with the Energy Manager accessory.
      To enable the communication with the Energy Manager, is required the S3Config
      software release 3.0.3 or later (parameter Battery:Battery type:Lithium + BMS).
N   - Added a new command, configurable on a remote input, to temporarily disconnect
      the inverter from the load. To active this command is required the S3Config
      software release 3.0.3 or later (parameter Remote I/O:Input mode:
      System DISCONNECT).
I   - The "Power reduction" configuration and the automatic "Power reduction" function,
      are now activated in real time even with the UPS switched on and the load powered.
I   - Improved the accuracy of the input peak current measurement.
I   - Added the special function ESCC.
      Notes: reserved function, applicable for Sentryum model 40KVA only.
B   - Fixed bug related to the logic of the backfeed protection remote output contact.
      IMPORTANT NOTE: the logic level was reversed. After the fix,in case of backfeed
      protection alarm, the associated relay is energized (with the default configuration
      "Relay on").
B   - In states [S61] and [S65], the function of waiting for the minimum battery charge
      (performed before powering the load from the inverter) has been removed.
B   - Removed the auto-clear function for the "Battery overvoltage" alarms
      [F19] and [F20].
B   - Fixed bug related to the current reduction of the battery charger required in case
      of overheating.     
B   - Fixed the error of non-reporting of the "Booster fault" alarm [F11],in case of
      failure to reach the required voltage.
T   - Improved the functionality of the "Power circulation test" in battery mode.

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FW075-0115: S3T-S3M_0115.ehx     [18/03/2021] CRC32:[979AC373] Standard production
FW075-0115: S3T-S3M_0115.hex     [18/03/2021] CRC32:[92A5A098] Standard production

C   - Fixed bug related to an abnormal start of the UPS with power supply voltages
      between 250 and 257 Vrms.
      In this condition:
      1. The UPS start-up with input stage (PFC, boost) not working.
      2. The bus voltage remain below the nominal value.
      3. The UPS can't supply load (fast drop of the bus voltage).
        
      Affected revisions: FW075-0114 ; FW075-0113 ; FW075-0112

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FW075-0114: S3T-S3M_0114.ehx     [23/02/2021] CRC32:[E0C0F02F] Standard production
FW075-0114: S3T-S3M_0114.hex     [23/02/2021] CRC32:[66790B3A] Standard production

B   - Fixed bug related to saturation of the load percentage up to 255% 
      in GPSer protocol and in the history data log.
B   - Fixed bug related to the power derating algorithm of the battery charger.
T   - The L01 signal now no longer includes the fault inherent to the power 
      good inverter.
T   - Increased the reliability of the temperature reading of the inverter and 
      boost module.

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FW075-0113: S3T-S3M_0113.ehx     [19/01/2021] CRC32:[A783BAA4] Standard production
FW075-0113: S3T-S3M_0113.hex     [19/01/2021] CRC32:[1765570E] Standard production

N   - Added "System DISCONNECT" mode in I/O signal management 

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FW075-0112: S3T-S3M_0112.ehx     [13/01/2021] CRC32:[41415835] Standard production
FW075-0112: S3T-S3M_0112.hex     [13/01/2021] CRC32:[2680CC74] Standard production

N   - First release for the new models Sentryum 30kVA and 40kVA
N   - First release for the new models Sentryum Central Supply Systems CBT and CBM
I   - Added autorestart function after a "Load off" event for overload, during
      battery working and bypass not available.
I   - Modified the default factory value for the parameter "Delay to switch
      when not synchronized [ms]:" from "Disabled" to "Enabled 10ms".
B   - Fixed a bug related to the polarity of the "External Sync signal".
      Before this correction the polarity of inverter voltage phase 1 was 180
      out of phase respect to the External Sync signal, if connected as shown
      in the user manual.
T   - Modified battery charger parameters to improve factory test.
      
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FW075-0111: NOT RELEASED

N   - Added information for the display related to countdown timer Shutdown,
      Restore, etc.
N   - Added "Energy reserve" function (CEI-016).
N   - Added "SF-0001" function.
N   - Added triggers events for output contact : Battery charge off, Synch on
      ext. source, External input, Emergency only switch EOS, Battery circuit alarm.
N   - Introduced high efficiency transformer compensation for the model P/N HS3TK10B1618.
I   - Added an additional regulator for asynchronous motor loads.
I   - Added "Auto unlock" function, after 5 Inverter or Bypass short time repeated faults.
I   - Added the logic to manage the automatic commutation between synchronization source
      (from bypass sync. to external sync and vice versa).
I   - Improved standard transformer compensation in OT models.
I   - Improved control for checking the maximum continuous output voltage.
I   - Improved management of external SWOUT
I   - Added the signaling of the alarm [A01] in case of "Cold start" with batteries
      connected but not configured.(Note: in this case the UPS doesn't starts).
I   - Added the possibility to set-up the time and the power(%) related to the
      "Power circulation" mode. To change this parameters is necessary to use the
      debug software "S3Debug".
I   - Added the possibility of forcing the Battery charger ON for debug pourpose,
      even in a system with unconnected batteries. To execute this function is necessary
      to use the debug software "S3Debug".
I   - Added DL1 and DL2 alternated blinking if the control board is ready and
      works normally.
I   - Added new features to the internal oscilloscope.
B   - Fixed a bug related to alarm signaling in case of inverter block due to overload.
      In previous revisions, even the alarms [L17][L22] were erroneously reported as
      the cause of the block.
B   - Fixed a bug related to the non-reporting of the "Battery polarity error" alarm
      in some cases of incorrect battery wiring.
B   - Fixed a bug related to the "Battery manual charge" algorithm in a parallel system.
T   - Improved filter on the line PAR_BYP_IN.
T   - Added default I/O configuration for the new models CBT and CBM.
T   - Added the alarm code "[F61] Calibration error BYP".

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FW075-0110: S3T-S3M_0110B.ehx     [20/11/2020] CRC32:[97EC3C04] Standard production
FW075-0110: S3T-S3M_0110B.hex     [20/11/2020] CRC32:[F66D8603] Standard production

Note: NOT RELEASED FOR PRODUCTION

T   - Adjusted the Zero Load Current map of the transformer High Efficiency.

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FW075-0110: S3T-S3M_0110.ehx      [09/09/2020] CRC32:[C1ADFA5C] Standard production
FW075-0110: S3T-S3M_0110.hex      [09/09/2020] CRC32:[AC627E18] Standard production

Note: NOT RELEASED FOR PRODUCTION

B   - Fixed bug related to the time synchronization (milliseconds synch.) used in the history
      data log, between the UPSs of a parallel system.
B   - Fixed a minor bug related to battery time estimation in particular conditions.
T   - Added bypass lock in case of transformer overtemperature [L35].
T   - Added informations in the history data log (Status b16-b22).
T   - Increased filtering time of the alarm [L01] (from 5ms to 10ms).
T   - Added filtering time of 200ms for Power-good BOOST and Power-good Inverter signals.
T   - Increased filtering time of the alarm [F53] from 20ms to 1s.
T   - Removed automatic slatch of the alarms [L01],[L02],[L34] and [L35].

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FW075-0109: S3T-S3M_0109.ehx      [03/09/2020] CRC32:[C92534F7] Standard production
FW075-0109: S3T-S3M_0109.hex      [03/09/2020] CRC32:[A7B1C06C] Standard production

Note: NOT RELEASED FOR PRODUCTION

I   - Improved the accuracy of the input current measurement.

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FW075-0108: S3T-S3M_0108.ehx      [22/05/2020] CRC32:[644F8892] Standard production
FW075-0108: S3T-S3M_0108.hex      [22/05/2020] CRC32:[F447806A] Standard production

N   - Introduced high efficiency transformer compensation (size 10kVA).
I   - Improved standard transformer compensation in OT type (size 10kVA 15 kVA and 20kVA).
B   - Fixed bug related to every x day battery test in scheduler action.
B   - Fixed bug related to ANY ALARM and NORMAL OPERATION output contact setting.
      During Battery test with this setup UPS shows a temporary alarm due to battery operation.
T   - Battery fuse diagnostic check disabled during battery charger factory test.

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FW075-0107: S3T-S3M_0107.ehx      [14/02/2020] CRC32:[7FD7A2F2] Standard production
FW075-0107: S3T-S3M_0107.hex      [14/02/2020] CRC32:[1F85D4A9] Standard production

N   - Added the parallel battery management for the "Common battery mode".
      To configure this type of battery connection is required the S3Config
      software release 1.0.3 or later (parameter Battery:Battery mode:Common).
I   - Added a check to identify any fault of the booster (alarm code [F11]).
I   - Added an alarm related to the thermal protection of an output transformer
      when required (alarm codes [F35] and [L35]).
I   - Improved battery test management.
I   - Improved autonomy estimation (added a filter for the active power value).
I   - Improved manual bypass management.
I   - Improved management of the switch-out auxiliary contact.
B   - Fixed the bug of the wrong registration in the historical archive of the
      measures of Watt% and VA%. Before the change, the values were always zero.
T   - Added checks for the configuration parameters "Battery mode" and
      "Recharging mode" when loaded from the configuration memory.

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FW075-0106: NOT RELEASED

B   - Fixed bug related to this situation: an UPS turned on in ECO mode, while the
      output is already powered by other UPSs, is not enabled to become Master in
      the system.
T   - Changed the exit condition from test mode with power.

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FW075-0105: S3T-S3M_0105.ehx      [21/11/2019] CRC32:[186A7D3C] Standard production
FW075-0105: S3T-S3M_0105.hex      [21/11/2019] CRC32:[6CD30958] Standard production

N   - Added the possibility to set a default configuration of the "Input signals"
      from display. In this case the associated functions will be:
      IN 1: SWMB Aux closed / IN 2: SWOUT Aux open / IN 3: CB OFF / IN 4: Bypass ON
      To set this default configuration is required the display firmware release
      FW079-0103 or later.
N   - Changed the default of the "Input signal IN 5". It's now configured as:
      mode=System ON / logic=Contact closed / delay [ms]=100.
N   - Added the "UPS password" management to control the "S3 Configurator"
      software login. To connect the configurator at the UPS, it's not more
      necessary to activate the expert level on the display. To lock the access
      to the UPS it's now possible to use the UPS password. To use this function is
      required the S3Config software release 1.0.2 or later.
N   - Added the possibility to compensate the voltage drop of the line 
      connecting the UPS output to the load. To configure the parameters of the line
      is required the S3Config software release 1.0.3 or later (not released yet).
N   - Added the automatic compensation of the voltage drop and of the current losses
      of the output transformer in OT UPS type.
N   - The countdown for the timers of shutdown and restore is now displayed
      on the homepage (if they are active).
I   - Improved Eco mode management.
I   - Improved Bypass management.
I   - Added an alarm related to "Power Good Inverter" signal.
I   - Improved "Remote IN" mode function.    
I   - Improved management of the I/O configuration change of the contact card.    
I   - Improved battery test and battery presence management.    
T   - Improved latch bypass function logic.
T   - Operating status changed in the event of UPS overload.      

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FW075-0104: S3T-S3M_0104.ehx      [01/10/2019] CRC32:[8F4CA039] Standard production
FW075-0104: S3T-S3M_0104.hex      [01/10/2019] CRC32:[DFA08EA7] Standard production

B   - Fixed bug related to the management of input contacts configured as
      Eco mode forced or Stand by off mode forced.
N   - Implemented the check of the power cable detachment in a parallel system.
N   - Implemented the Master decay in a parallel system due to relay or fuse
      failure.
I   - Improved management of the battery test in parallel system.
I   - Improved parallel regulation check for active and reactive power
      displacement.
I   - Improved output current computation at weak loads.
T   - Monophase inverter current limitation to the max of the three phases.
T   - Added RMS saturation and peak limitation to the reference of the inverter.
T   - Extended battery discharge curves up to 5 IC via interpolation.

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FW075-0103: S3T-S3M_0103.ehx      [12/09/2019] CRC32:[799FD89C] Standard production
FW075-0103: S3T-S3M_0103.hex      [12/09/2019] CRC32:[4FE52EA0] Standard production

B   - Fixed bug related to bypass current in GPSER protocol and monophase UPS.
I   - Improved CSS mode.

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FW075-0102: S3T-S3M_0102.ehx      [30/08/2019] CRC32:[02E47462] Standard production

B   - Fixed bug in startup ramp (CSS mode).
B   - Fixed bug in UPS date and time synchronization in a parallel system when
      backup supercapacitor fails or during a hot-expansion of the parallel 
      system.
B   - Fixed bug in cycling battery recharge.
B   - Fixed bug in management battery test related to switch-out status.
B   - Fixed bug in message signaling on the display "Mains phase reverse".
B   - Fixed bug in message signaling on the display "Output overload L1".
B   - Fixed bug in message signaling related to battery end management.
I   - Filtered Anomaly message A05,A06,A07,A08,A09,A10,A13,A14,A15.
I   - Improved the PFC stability with the following configuration:
      INPUT: three-phase   OUTPUT:monophase.
I   - Reduced duration of the battery test to 5s.
I   - Improved CAN BUS communication (set-up parameters).
I   - Improved management of the link open in a parallel system at startup.
I   - Improved overload management.

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FW075-0101: S3T-S3M_0101.ehx      [18/07/2019] CRC32:[3A546D90] Standard production

N   - First release for production.

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FW075-0100: S3T-S3M_0100.ehx      [03/07/2019] CRC32:[B89A448C] Standard production

N   - First release.
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