UPS 120, UPS 150, UPS 250, UPS 300, UPS 301, UPS 500, UPS 600, UPS 750 and UPS 900 Uninterruptible Power Supplies Caterpillar


UPS Operating Parameters

Usage:

UPS 250 APZ


Note: A password for the service level provides access to all of the parameters in Table 1.

Note: The "Field Adjustment" column represents parameters that are most likely to be set when a UPS is commissioned for a specific customer.

Note: Many parameters will not be set to the parameter default values, especially on a 400V, 50 Hz system.

Note: The low limit and the high limit are only software limits. The limits are not functional limits.

Table 1
Name  Min  Max  Default (1)  Field Adjustment  Definition  Level 
Accelerometer Gain  0.1  1.67    The "Accelometer Gain" parameter is a scale factor that is applied to the vibration signal in order to achieve accurate vibration readings.  Service 
AHC Enable    The "AHC Enable" parameter turns on the Automatic Harmonic Correction. The "AHC Enable" parameter will improve the UPS input current THD for various nonlinear loads.  Service 
ATS Cmd Level Off Delay  600  Yes  The "ATS Cmd Level Off Delay" parameter sets the amount of time to open (clear) the ATS command relay after all conditions are met. The ATS command relay is also referred to as the remote output. The three conditions that must exist to clear the bit:
1) The UPS must be in stand-by.
2) The system % of energy must be greater than the ATS Command Level.
3) The ATS stop delay has timed out. 
Service 
ATS Command Level  100  Yes  The "ATS Command Level" parameter is a system (flywheel) % energy setting. The parameter controls when the ATS transfer command is given via a remote output relay. The four conditions that must exist to set this bit: UPS in discharge, UPS in discharge for more than 1 second, UPS not in walk-in, and System % energy < ATS Command Level. ( A typical setting is 85%.) Full load testing is recommended to insure sufficient generator start times.  Service 
Auto Load and Start  Yes  The "Auto Load and Start" parameter defines what the UPS will do automatically when power is applied to the UPS after a complete outage. 0 = The UPS will require manual intervention to get the UPS in bypass and online. 1 [default] = The UPS will require manual intervention to get the UPS on-line. The UPS will power up in bypass. 2 = The UPS will go to the on-line state without any intervention.  Service 
Bearing Install Day  31  Yes  The "Bearing Install Day" parameter sets the day when the flywheel was started up or when the most recent bearing change occurred.  Service 
Bearing Install Month  12  Yes  The "Bearing Install Month" parameter sets the month when the flywheel was started up or when the most recent bearing change occurred.  Service 
Bearing Install Year  2031  Yes  The "Bearing Install Year" parameter sets the year when the flywheel was started up or when the most recent bearing change occurred.  Service 
Bot. Bearing Force  100  650  150    The "Bot. Bearing Force" parameter sets the amount of magnetic lifting force that is applied to the rotor of the flywheel when the UPS is in standby.  Service 
Bypass Break Duration  30    When a break-before-make transition occurs, the "Bypass Break Duration" parameter controls the amount of time that no voltage will be applied to the load. The closing time of the bypass contactor or breaker is not taken into account in this timer.  Service 
Bypass Range Checking  Yes  The "Bypass Range Checking" parameter is valid only on UPS's with system cabinets: 0 = off, 1 = on with full messages, 2 = on with message suppression during discharge. When "ON" the UPS will compare output to the bypass source before making a transition. This check is ONLY performed when a transition to bypass is made. Once the UPS is in bypass, this parameter has no function. The items checked are bypass voltage (+/-10%), frequency difference (0.5Hz), and phase difference (15 degrees).  Service 
DC Bus Hi Trip Offset  10  200  70    If the DC bus rises above the DC Bus Voltage setpoint plus this number, the UPS will go into discharge.  Service 
DC Bus Low Trip Offset  10  200  70    If the DC bus falls below the DC Bus Voltage setpoint minus this number, the UPS will go into discharge.  Service 
Def. Data Log Rate  7200  3600  Yes  The "Def. Data Log Rate" parameter sets the time, in seconds, that the telemetry will be sent to the UPSView data log files if a computer is connected. When the UPS is discharging, the log rate is the maximum (Two samples per second).  Set. 
Disable +-15V PS Check    The "Disable +-15V PS Check" parameter disables the 15 VDC power supply checking. Newer APCs have some enhanced power supply checks. The "Disable +-15V PS Check" will need to be disabled on older units.  Service 
Disch Min. Byp-Inp Lock  100  30    The "Disch Min. Byp-Inp Lock" parameter is valid only on UPS's with dual inputs: If the flywheel energy falls below the parameter set point, when the input returns and the UPS are synchronized to the Bypass source, the following will occur:
The UPS output will stay synchronized to the bypass source.
The UPS will exhaustively discharge.
No interruption to the output will occur. 
Service 
Frequency Slew Rate  0.05  Yes  The "Frequency Slew Rate" parameter controls the speed in which the UPS output voltage will be brought in-phase (phase match) with the input to begin the process of ending a discharge (walk-in).  Service 
Gen Set Dis. Volt. Match  Yes  When the UPS is ready to start a walk-in from a discharge and the "ON Generator" signal from a remote input is high, the parameter will match the input and output voltages before closing the main static switch. If the parameter is set to 0, the parameter will not match the input and output voltages. Instead, the parameter will maintain the Nominal Voltage set point throughout the walk-in.  Service 
Gen Set Max. Current  10  400  400  Yes  The "Gen Set Max. Current" parameter sets the maximum input current while the "ON Generator"signal from a remote input is high (closed). The parameter could be used with "GS Max. MtrIn Current" to prevent a generator overload when the generator rating smaller than the UPS. A successful installation involving an undersized generator requires the transient response of the generator to be good.  Service 
Gen Set Transient Tol  50  25  Yes  The "Gen Set Transient Tol" parameter sets the Transient VAC Tolerance while the "ON Generator" signal from a Remote Input is high (closed).  Service 
Gen Set Walk-in Rate  10  750  85  Yes  The "Gen Set Walk-in Rate"parameter sets the Walk-in Rate while the "ON Generator" signal from a remote Input is high. If the walk-in rate is set too high, the generator voltage can sag or slow down in frequency. The frequency will cause the input voltage to be disqualified and the UPS to go back into discharge before the walk-in is complete.  Service 
Genset Motoring Delay  120  Yes  The "Genset Motoring Delay" parameter sets the amount of time the controller will wait after the walk-in before the controller will start motoring the flywheel. (MMS) The Genset Motoring Delay parameter must be set in each MMU. The "Genset Motoring Delay" parameter can also be a different value in each MMU.  Service 
Genset Start Level  100    The "Genset Start Level" parameter is a system (flywheel) % energy setting that controls when the generator start command is given via a remote output relay. Caterpillar recommends the use of the ATS Command relay to accomplish the function.  Service 
Genset Stop Delay  10  600  60    After the flywheel is at speed and the UPS is being powered from the utility, the remote output relay will de-energize after this time delay. (seconds)  Service 
GS Max Motor Current  10  400  200  Yes  The "GS Max Motor Current" parameter sets the maximum motor current while the "OnN Generator" signal from a remote input is high (closed). A smaller number will reduce the step unload that occurs at the end of flywheel motoring. This reduction is useful on generators with poor transient performance. This parameter should not be set to 0 and be greater than the minimum motoring current.  Service 
GS Max. Mtr In Current  10  440  440  Yes  The "GS Max. Mtr In Current" parameter sets the maximum motoring in current while the "ON Generator" signal from a remote input is high (closed).  Service 
GSC Current Limit  94  45    The "GSC Current Limit" parameter is the AC current limit of the Genset Start IGBTs.  Service 
GSC Current Limit Hys  94  10    Once the GSC current limit is reached, the controller will not turn the Genset start IGBTs back on until the current has fallen below the GSC current limit minus the GSC current limit hysteresis.  Service 
GSC Enable    The "GSC Enable" parameter must be set to 1 if the UPS has the Genset start option. (power electronic version)  Service 
Hard Grounded System    The "Hard Grounded System" parameter is set to 0 when the power distribution system feeding the UPS has a Neutral grounding resistor. (This option has never been implemented.)  Service 
Input Over Volt Trip  10  10  Yes  The "Input Over Volt Trip" parameter sets the percent of deviation above the Nominal Voltage set point. If the percent of deviation is above the set point, the system will disqualify the input voltage and the system will enter into discharge.  Service 
Input Under Volt Trip  15  10  Yes  The "Input Under Volt Trip" parameter sets the percent deviation below the Nominal Voltage set point. If the percent of deviation is below the set point, the system will disqualify the input voltage and the system will enter into discharge.  Service 
Internal CAN Enable    The Internal CAN Enable parameter enables the CAN network. This parameter must be turned on in Multi Module [flywheel] Systems (MMS).  Service (Hidden) 
Internal CAN Node ID  0x0e  0x01    The "Internal CAN Node ID" parameter is set to identify the MMU number. Each MMU requires a unique ID and should be numbered sequentially 1 to the total number of MMUs in the system.  Service (Hidden) 
KW Compare Setpt 1  1000  Yes  The "kW Compare Setpt 1" parameter sets the kW levels that will cause the output kW Remote Output to change states. Each set point must be at least 10 kW apart in order for the output to work. Setting each set point to zero disables the function. The logic works as follows: 1) If set point 1 is less than set point 2, then the relay is energized when the output kW is less than set point 1. The relay is de-energized when set point 1 goes back above set point 2. 2) If set point 1 is greater than set point 2, then the relay is energized when the output kW is greater than set point 1 and de-energized when the output kW goes below set point 2. To energize relay: OutputKW < set point 1 < setpoint 2, or OutputKW > set point 1 > setpoint 2 Once energized, de-energize relay: OutputKW < setpoint 2 < setpoint 1, or OutputKW > setpoint 2 > setpoint 1  Service 
KW Compare Setpt 2  1000  Yes  The "KW Compare Setpt 2" parameter sets the KW levels that will cause the output KW Remote Output to change states. Each setpoint must be at least 10KW apart in order for the output to work. Setting the parameter to zero disables the function. The logic works as follows: 1) If set point 1 is less than set point 2, then the relay is energized when the output kW is less than set point 1 and de-energized when the output kW goes back above set point 2. 2) If set point 1 is greater than set point 2, then the relay is energized when the output KW is greater than set point 1 and de-energized when the output kW goes below set point 2. To energize relay: OutputKW < set point 1 < setpoint 2, or OutputKW > set point 1 > set point 2 Once energized, de-energize relay: OutputKW < setpoint 2 < setpoint 1, or OutputKW > set point 2 > set point 1  Service 
LC Startup Low Limit  550  600  550    The "LC Startup Low Limit" parameter sets the minimum load cell measured weight that must exist for the flywheel to be motored or discharged.  Service 
LCD Contrast  25  100  70  Yes  The display stores contrast data in the "LCD Contrast" parameter.  Service 
Load Cell Cal. Constant  1.8  2.2  Yes  The "Load Cell Cal. Constant" parameter comes from the load cell certificate. This parameter is unique to each load cell.  Service 
Load Cell Offset  -0.9  0.9  Yes  If the load cell zero pound offset is known, then the offset is recorded in the
Load Cell Offset
parameter. (mV) 
Service 
Load Cell SN(no letters)    Yes  The "Load Cell SN (no letters)" parameter comes from the load cell certificate. This parameter is unique to each load cell.  Service 
Max Peak Inv. Current  100  1500  900    The "Max Peak Inv. Current" parameter is the maximum inverter current that can go through the utility Skiips (IGBTs) before PWM current limiting occurs.  Service 
Max RMS Inv. Current  10  400  400    The "Max RMS Inv. Current" parameter is the maximum current that can be drawn through the filter inductor when the UPS is Online (not discharging).  Service 
Max Xfer Ph. Angle Diff  179  15    The "Max Xfer Ph. Angle Diff" is valid only on UPS's with system cabinets: If bypass range checking is on, the function sets the maximum allowable phase angle difference between the output and bypass source. The phase angle is set before a transfer to bypass will be attempted.  Service 
Max. Mtring In Curr.  10  440  440  Yes  The "Max. Mtring In Curr." parameter sets the maximum input current per MMU when the UPS is motoring. 5) The UPS will reduce the amount of voltage correction if the input voltage and load conditions exist that allow the input current to reach the "Max. Mtring In Curr." parameter setting. The UPS will continue to reduce the amount of voltage correction until the conditions change. The input voltage must be at least -10% and the load conditions must be 100% load and 0.8pf lag  Service 
Maximum Input Current  10  400  400  Yes  The "Maximum Input Current" parameter sets the maximum input current per MMU when the UPS is not motoring. If the input voltage (-10%) and load conditions (100% load, 0.8pf) exist such that the input current hits this number, the UPS will reduce the amount of voltage correction until the conditions change.  Service 
Maximum Motor Current  10  400  200  Yes  The "Maximum Motor Current" parameter sets the peak current that will be applied to the armature while motoring. The parameter ultimately controls the amount of power that will be drawn from the source to motor the flywheel.  Service 
Min. Motoring Current  10  150  100    The "Min. Motoring Current" parameter is the minimum that the current will be reduced to whenever the armature motoring current is reduced. The current can be reduced due to input or filter current limits.  Service 
MMU Serial Number      The "MMU Serial Number" parameter is a unique number for each MMU that is set by manufacturing. Loading defaults will not change this number. This parameter should never be changed. If the parameter is set to 0, the ethernet option will not work.  Service 
Modbus Baud Rate  9600  19200  9600  Yes  Modbus option setting  Set. 
Modbus TCP/2W/4W  Yes  The "Modbus TCP/2W/4W" parameter determines the Modbus type. 0 = TCP, 1 = 2W, 2 = 4W The TCP type must have the Network option enabled. The 2W/4W types must use the newer SIOD (30126-2) and have the JMPA (on SIOD) in the RS485 position.  Service 
Modbus Unit ID  247  Yes  Modbus option setting  Set. 
Modbus TCP Timeout  7200    The "Modbus TCP Timeout" parameter sets the time (seconds) in which inactive Modbus connections will be closed. The connections will be closed to prevent the UPS Modbus code from locking up due to the maximum number of connections being exceeded.  Service 
Model Index  13    The "Model Index" parameter sets the model of the system (# of MMUs, Etc.)  Service 
Modem Type  Yes  The "Modem Type" is set based on the modem that is installed (0 = internal, 2 = v.everything, 3=zoom)  Set. 
Monitor S/W Baud Rate  38400  38400  38400    The "Monitor S/W Baud Rate" is the speed in which the UPS communicates serially with a laptop using UPSView.  Set. 
Motor Ramp Down Factor  10  Yes  The "Motor Ramp Down Factor" sets the rate in which the flywheel charging current will be reduced as the flywheel approaches full speed. This results in a several second (step unload) reduction in the charging power at the input of the UPS. The "Motor Ramp Down Factor" should minimize the chance of a generator over speed at the end of motoring. Setting this parameter to a 0 will result in an ~ three cycle step unload of the charging power.  Service 
Motoring Bearing Force  100  650  250    The "Motoring Bearing Force" parameter sets the amount of magnetic lifting force that is applied to the rotor of the flywheel when the flywheel is being motored.  Service 
Neutral Connected    The "Neutral Connected" parameter must be set for a four wire system.  Service 
No DC Bus Fuses    The "No DC Bus Fuses" parameter is set to 1 for the new fuseless DC bus  Service 
Nominal Voltage  300  600  480  Yes  The "Nominal Voltage" parameter sets the target output voltage for the voltage regulator. The system will regulate to this value unless the conditions are such that the maximum input current or maximum filter current have been reached. In this case the system will back off on the regulation to keep the input or filter current limits from being exceeded. The parameter value is also used with parameters 6, 7, 97, & 98.  Service 
Output Over Volt Tol.  10  10    The "Output Over Volt Tol." parameter sets the percent deviation above the Nominal Voltage setting at which the system will disqualify the output voltage and go to bypass. The parameter allows the system to be overloaded while the Maximum Input Current or the Maximum Filter Current have been reached without causing the output voltage to rise too far out of tolerance with increasing load.  Service 
Output PN Volt Factor  1.2  1.3  Yes  The "Output PN Volt Factor" parameter sets the output voltage phase to neutral limit that is used to detect a non-firing neutral static switch.  Service 
Output Under Volt Tol.  15  10    Sets the percent deviation below the Nominal Voltage setting at which the system will disqualify the output voltage and go to bypass. The parameter allows the system to be overloaded while the Maximum Input Current or the Maximum Filter Current have been reached without causing the output voltage to drop too far out of tolerance with increasing load.  Service 
Over Frequency Trip  50  66  62  Yes  Sets the maximum input frequency for which the system will remain in Line Mode operation. Beyond this frequency, the system will enter discharge. A step unload on a generator may cause the generator to speed up and go above this level. The Over Frequency Trip is the maximum frequency which the load will be exposed to unless the system transitions to a bypass source at a higher frequency.  Service 
Overload Transfer Limit    Sets the number of overload transfers to Bypass that can occur within a 10 minute period before Online mode will be disabled without operator intervention.  Service 
Overload Warn Disable  Yes  The parameter provides the ability to turn off overload alarms.  Service 
Redundant Switch Hour  24    On redundant systems only (model index), the redundant MMU will rotate every 24 hours. The redundant switch hour is the hour (0-24) that the redundant MMU will change.  Service (Hidden) 
Remote Input 1  25  Yes  Defines the programmable remote input number 1.  Set. 
Remote Input 2  25  Yes  Defines the programmable remote input number 2.  Set. 
Remote Input 3  25  Yes  Defines the programmable remote input number 3.  Set. 
Remote Input 4  25  Yes  Defines the programmable remote input number 4.  Set. 
Remote Input 5  25  Yes  Defines the programmable remote input number 5.  Set. 
Remote Input 6  25  Yes  Defines the programmable remote input number 6.  Set. 
Remote Output 1  120  101  Yes  Defines the programmable remote contact output number 1.  Set. 
Remote Output 2  120  102  Yes  Defines the programmable remote contact output number 2.  Set. 
Remote Output 3  120  103  Yes  Defines the programmable remote contact output number 3.  Set. 
Remote Output 4  120  50  Yes  Defines the programmable remote contact output number 4.  Set. 
Remote Output 5  120  104  Yes  Defines the programmable remote contact output number 5.  Set. 
Remote Output 6  120  105  Yes  Defines the programmable remote contact output number 6.  Set. 
Single Display    Set to 1 when a MMS only has 1 display. 2.4 hardware release  Service (Hidden) 
Stepped Phase Match    Sets the stepped phase match instead of a ramped phase match.  Service 
Sweep Field Current  12    Field Current setpoint used during the start-sweep. (0-60RPM)  Service 
Sweep Motoring Current  10  150  100    Motoring Current Limit used during the start-sweep. (0-60RPM)  Service 
Transient VAC Tolerance  50  15  Yes  Sets the percent deviation from the prevailing input voltage in which the system will disqualify the input voltage and enter into discharge. Lowering this parameter causes the system to enter into discharge on small events and improves the output transient performance. Increasing this parameter decreases the likelihood that the system will enter discharge on utility noise events.  Service 
Under Frequency Trip  45  60  58  Yes  Sets the minimum input frequency for which the system will remain in Line Mode operation. Below this frequency, the system will enter discharge. A step load on a generator may cause the generator to slow down below this level. The under frequency trip is the maximum frequency which the load will be exposed to unless the system transitions to a bypass source at a higher frequency.  Service 
UPS Net Enable    Enables the UPS network. The UPS Net Enable must be turned on in Multi Module Systems (MMS) or system with a system cabinet. It must be turned OFF in an SMS.  Service (Hidden) 
Walk-in Rate  10  750  85  Yes  Sets the rate in which the real part (KW) of the load is transferred from flywheel to the input when the system is transitioning from Discharge mode to Online mode. This rate is used at the system level regardless of the number of MMUs. A fast Walk-in Rate can result nuisance trips back into discharge during the Walk-in due to a sagging input voltage.  Service 
Xtra Disch. VAC Tol.  50  10    Sets the % tolerance that is added to the Transient VAC Tolerance (or the Gen Set Transient Tol.) after the UPS goes into discharge. The tolerance is removed 1 second after the flywheel starts motoring.  Service 
(1) Default values are for general information. Actual defaults may differ depending on system configurations, installation sites, and local codes. Check each individual unit.

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