The information in this section applies only to the earlier version of the CDVR. There are notes placed in each of the other stories, where applicable, that inform the reader to refer to the information contained in this section.
The part number for the earlier version of the CDVR is 314-7755 Voltage Regulator Assembly.
Parameter Viewing and Configuration (Caterpillar PC Software)
Installing the Caterpillar PC Software
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Starting Caterpillar PC Software
The PC software is started by clicking the Windows "Start" button, pointing to "Programs", the "Caterpillar" folder, and then clicking the voltage regulator icon. At startup, a dialog box with the program title and version number is displayed briefly. After this dialog box is displayed, the "System Configuration" screen is displayed. See Illustration 1.
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
The settings are arranged into the following five groups:
- System configuration
- Setting adjustments
- Control gain settings
- Protections settings
- Metering/operation and alarms
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| Illustration 1 | g01393989 |
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Systems configuration screen (1) System configuration button (2) Setting adjustment button (3) Control gain button (4) Protection setting button (5) Metering/operation button (6) Get from unit button (7) EEPROM button | |
Each setting group has a corresponding button that can be selected to access that group of settings. Refer to Illustration 1. The five setting groups can also be accessed by clicking "Screens" on the menu bar and then selecting the desired setting group from the list. Once a setting group is accessed, the individuals settings of the group can be viewed and changed.
A setting is changed by clicking within the setting field and typing the setting. The minimum, maximum and increments (steps) for a setting are displayed on the status bar when the cursor is placed within that setting field. A changed setting is sent to the voltage regulator when the "Enter" key on the PC is pressed. A setting in a field with the drop-down menu is sent to the voltage regulator when the setting is selected from the drop-down menu.
A setting can be selected from the drop-down menu. The setting can then be sent to the voltage regulator.
Sending and Receiving Settings
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Each of the five setting groups have a corresponding screen in the PC software. The setting of each screen is categorized by one or more tabs. In the following paragraphs, setting are arranged and defined according to the organization of the PC application screens and tabs.
The "System Configuration" screen consists of one tab labeled "Configuration". Click the "Configure" button (1) in order to access the "System Configuration" screen or click "Screens" on the menu bar and click "System Configuration".
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| Illustration 2 | g01393995 |
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
The "Setting Adjustments" screen consists of two tabs labeled "Setpoint" and "Startup". Click the "Settings" button (2) in order to access the "Setting Adjustments" screen or click "Screens" on the menu bar and click "Setting Adjustments".
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| Illustration 3 | g01009341 |
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Set point tab as seen without AVR voltage control and VAR/PF control desired input configuration (for original firmware). | |
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| Illustration 4 | g01418840 |
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Set point tab with AVR voltage control and VAR/PF control desired input configuration | |
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
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| Illustration 5 | g01393997 |
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
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| Illustration 6 | g01009752 |
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
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| Illustration 7 | g01009884 |
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Metering, Operation, and Alarms
The "Metering, Operation, and Alarms" screen consists of a single tab labeled "Metering". Click the "Metering" button to access the "Metering, Operation, and Alarms" screen or click "Screens" on the menu bar and click "Metering/Operation".
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| Illustration 8 | g01010266 |
Note: When communication is established, a "Metering" choice becomes available in the menu bar. Metering can be disabled by selecting "Disable Metering" from this choice. When metering is disabled, contact inputs will still work normally, but will not indicate. "Alarms" will still work normally and indicate. The raise and lower buttons will still work and show a changed set point. If another tab is selected when metering is disabled, then the "Metering" tab is selected, metering will become enabled automatically.
GEN VOLTAGE (V): Vab - This field is a read-only field that displays the phase-to-phase voltage of phase A and phase B.
GEN VOLTAGE (V): Vbc - This field is a read-only field that displays the phase-to-phase voltage of phase B and phase C.
GEN VOLTAGE (V): Vca - This field is a read-only field that displays the phase-to-phase voltage of phase C and phase A.
GEN VOLTAGE (V): Vavg - This field is a read-only field that displays the average value of the three phase-to-phase voltages.
GEN CURRENT (A): Ib - This field is a read-only field that displays the value of the current on the B phase of the generator.
GEN FREQ (Hz): Freq - This field is a read-only field that displays the value of the frequency of the generator voltage.
GEN POWER: kWatts - This field is a read-only field that displays the value of real power that is being output from the generator.
GEN POWER: kVA - This field is a read-only field that displays the value of apparent power that is being output by the generator.
GEN POWER: kVAR - This field is a read-only field that displays the value of reactive power that is being output by the generator.
GEN POWER: PF - This field is a read-only field that displays the value of the power factor that the generator is operating at.
AUX DC INPUT (V): Vaux - This field is a read-only field that displays the level of dc control voltage that is applied from a remote device to the voltage regulator terminals "P12-3" (B) and "P12-6" (A).
Note: The "Aux DC Input" terminals can be used as an alternate method of adjusting voltage in "AVR" mode. The "Aux DC Input" terminals can be used as an alternate method of adjusting PF. The "Aux DC Input" terminals can be used as an alternate method of adjusting VAR in PF. adjustingVAR mode when used with an existing remote VAR/PF controller. A DC input on these pins acts as a DC bias. When the CDVR is in "AVR" mode, a 1 VDC change on the terminals corresponds to a 1 percent change in the voltage set point. A 1 VDC change gives a 10 percent VAR change (in "VAR" mode) and a 0.04 PF change (in "PF" mode). If the DC voltage is removed from the ±10 VDC control input, the operating set point will return to the original value regardless of pressing the EEPROM button.
Note: Adding a DC voltage when the operating set point is near the voltage adjust band limit may allow the regulator to operate outside of the voltage adjust band.
EXCITER FIELD: Vfd (V) - This field is a "read-only" field that displays the value of the exciter field voltage.
EXCITER FIELD: Ifd (A) - This field is a "read-only" field that displays the value of the exciter field current.
OPERATING MODE - One of three operating modes may be selected as active: "AVR", "VAR", or "PF". When an operating mode is active, the corresponding indicator color changes from black to red for "AVR" mode. When an operating mode is active, the corresponding indicator color changes from black to green for the "VAR" mode and the "PF" mode.
Note: When either KVAR or PF mode are selected, the appropriate button must be selected and the auxiliary breaker contact that is connected to "P9-6" (KVAR/PF enable contact) and "P9-9" (contact sense common) must be closed.
Note: "Droop" should be enabled whenever the CDVR is operated in PF or VAR mode. The newest version of the CDVR PC firmware will not allow the operator to select PF or VAR mode unless "Droop" is selected in the "Settings" menu first. The "Droop" setting can be set to 0 percent.
FINE ADJUSTMENT - The "Raise" and "Lower" buttons control the fine adjustment of the operating set point. These buttons perform the same function as closing the appropriate set of contacts connected to the "Contact Sense – Raise" input (terminal P9-5) and "Contact Sense - Lower" input (terminal P9-4) of the voltage regulator. Each click of the "Raise" button increases the voltage set point by 0.1 V, each click of the "Lower" button decreases the voltage set point by 0.1 V.
Note: The PT ratio will affect this setting.
Note: An alternate method of adjusting voltage is to adjust the DC voltage between terminals "P12-3" and "P12-6".
SET POINT: AVR (V) - This setting field is used to enter the desired generator terminal voltage. The background color of this field is green when the voltage regulator is in AVR mode.
Note: The PT ratio will affect this setting.
SET POINT: VAR (percent of nominal) - This setting determines the level of generator VARs maintained by the voltage regulator when operating in VAR mode. The background color of this field is green when the voltage regulator is regulating the VAR set point. A percentage value of zero to 100.0 may be entered in 0.1 percent increments.
SET POINT: Power Factor - This setting determines the level of power factor regulation maintained by the voltage regulator. The background color of this field is green when the voltage regulator is regulating the power factor set point. A power factor value of –0.600 to 0.600 may be entered in 0.001 increments.
STATUS - Four indicators indicate the operating status of the voltage regulator: "Droop", "Line Drop", "Under Frequency" and "Soft Start".
The "Droop" indicator turns red when the "Reactive Droop Compensation" feature is selected. The "Reactive Droop Compensation" feature is used during parallel generator operation to assist in the sharing of reactive load.
The "Line Drop" indicator turns red when the "Line Drop Compensation" feature is selected The "Line Drop Compensation" feature is used to compensate for voltage drops in the lines between the generator and the load.
The "Under Frequency" indicator turns red when the generator frequency decreases below the "Knee Frequency" setting and excitation is terminated.
The "Soft Start" indicator turns red when the "Soft Start" feature is active to control the time for generator voltage to ramp up during startup.
CONTACT INPUTS - Five indicators provide the status of the voltage regulator switch inputs: "Raise", "Lower", "VAR / PF", "Excitation Disable" and "Fault Reset".
The "Raise" indicator turns red when contact closure at terminals "P9-5" "Contact Sense - Raise" and "P9-6" "Contact Sense - Common" is detected.
The "Lower" indicator turns red when contact closure at terminals "P9-4" "Contact Sense - Lower" and "P9-6" "Contact Sense - Common" is detected.
The "Var/PF" indicator turns red when contact closure at terminals "P9-9" "Contact Sense - Var/PF Enable" and "P9-6" "Contact Sense - Common"is detected.
The "Excitation Disable" indicator turns red when contact closure at terminals "P9-7" "Contact Sense – Excitation Disable" and "P9-6" "Contact Sense - Common" is detected.
The "Fault Reset" indicator turns red when contact closure at terminals "P9-8" "Contact Sense - Fault Reset" and "P9-6" "Contact Sense - Common"is detected.
ALARMS - Ten indicators annunciate alarm conditions. Alarm indicators include the following alarms: "Internal Memory Failure", "Internal Watchdog Failure", "Exciter Diode Monitor", "Excitation Loss", "Generator Over voltage", "Generator Undervoltage", "Over excitation", "Loss of Sensing", "Field Over current (28 Amps instantaneous shutdown)" and "Fault Reset Too Long". When the voltage regulator detects an alarm condition, the appropriate indicator changes from black to red.
ALARMS: Shutdown Override Status - This indication provides the status (position) of the "Shutdown Override Button". The button displays "ENABLED" when selected and "DISABLED" when deselected.
The CDVR does some diagnostic code logging and diagnostic code broadcasting. These codes are transmitted over CANbus. When the CDVR is operating, any active diagnostic codes will be transmitted along with a description of that code and the occurrence count.
If power is removed from the CDVR, the nonvolatile memory will retain the following information for each of the ten alarms if any codes have been logged:
- Code
- Description
- Service meter hours first
- Service meter hours last
- Real-time clock first
- Real-time clock last
- occurrence count
Note: The CDVR does not know the actual time. The CDVR only knows the elapsed time from CDVR power up.
Caterpillar PC software enables you to print a list of voltage regulator settings, save voltage regulator settings in a file, and open a settings file in order to upload those settings to a voltage regulator. A settings file may also be opened and edited with any text editing software.
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| Illustration 9 | g01394300 |
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Print icon | |
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| Illustration 10 | g01016740 |
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| Illustration 11 | g01016741 |
A printout of voltage regulator settings can be useful for record keeping or comparison purposes. The voltage regulator settings can be printed by clicking the print icon (1) or clicking "File" on the menu bar and then clicking "Print". When the print command is given, a dialog box provides the opportunity to add a title and comments to the settings list. See illustration 10. Each entry is limited to a maximum of 54 characters. After this information is entered, click on "OK". The "Print Settings" box will appear. See Illustration 11. The dialog box is used in order to select the desired printer, change and verify the printer settings, and preview the printed settings list. Click on the "Print" button in order to print the settings list.
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Uploading the Settings Files to the Voltage Regulator
A voltage regulator settings file downloaded from a voltage regulator or created within the PC software can be uploaded to multiple voltage regulator units. Only a voltage regulator settings file with a ".dv2" extension can be uploaded to a voltage regulator unit. Before uploading a file, communication must be initiated with the voltage regulator that is to receive the settings. See Systems Operation, "Remote Communication".
The upload process is started by clicking the open icon or clicking "File" on the menu bar and then clicking "Open". An "Open" dialog box is then displayed where the desired settings file is navigated to and selected. Clicking "Open" uploads the settings file. The default settings for the CDVR are stored in a file called "Defaults.DV2" in the "CDVR PC Software" folder on the PC.
The defaults are displayed here for reference.
| CDVR PC Software Settings | |
| Rated kVAR (@ 0.8 Power Factor): | 75 |
| Sensing Mode: | 1 (0= Single-Phase, 1= Three-Phase) |
| Rated Generator Frequency: | 0 (0=60 Hz, 1=50 Hz) |
| Rated Generator Voltage: | 120 (Volts) |
| Generator PT Primary Voltage Rating: | 120 (Volts) |
| Generator PT Secondary Voltage Rating: | 120 (Volts) |
| Generator CT Primary Current Rating: | 600 (Amps) |
| Generator CT Secondary Current Rating: | 5 (Amps) |
| Rated Generator Current: | 600 (Amps) |
| Power Input Frequency: | 60 (Hz) |
| Load Compensation Mode: | 0 (0=Off, 1=Droop, 2=Line Drop) |
| Operating Mode: | 2 (0=AVR[Off], 1=PF, 2= AVRVAR) |
| AVR Set point: | 120.0 (Volts) |
| AVR Minimum Set point: | 102.0 (Volts) |
| AVR Maximum Set point: | 138.0 (Volts) |
| VAR Set point: | 0.0 (%) |
| PF Set point: | 1 |
| AVR Voltage Control: | 0 (0= CAN Input, 1= Switch) |
| VAR/PF Control: | 1 (0= CAN Input, 1= Switch) |
| Soft Start Bias: | 10.00 (%) |
| Soft Start Time: | 5.00 (Seconds) |
| Knee Frequency: | 50.00 (Hz) |
| Decreasing Slope 1: | 2.00 (Volts/Hz) |
| Minimum Voltage: | 50.00 (% of rated) |
| Frequency Deviation from Knee Frequency: | 5.00 (Hz) |
| Decreasing Slope #2: | 2.00 (Volts/Hz) |
| Minimum Frequency: | 25.00 (Hz) |
| AVR Proportional Gain: | 200 |
| AVR Integral Gain: | 600 |
| AVR Derivative Gain: | 30 |
| Noise Filter Time Constant: | 0.00 (Seconds) |
| Regulator Loop Gain: | 50 |
| Pre-defined PID Gains: | 21 (1-20 or Custom) |
| Voltage Adjustment Band Limit: | 15.00 (% of rated) |
| Over excitation Type: | 0 (0 = Threshold, 1 = Inverse Time) |
| Over excitation Trip Value: | 12.0 (Amps) |
| Over excitation Time Setting: | 10 |
| Excitation Loss (Reverse VAR): | 1 (0=Disabled, 1=Enabled) |
| Excitation Loss (Reverse VAR) Fault Type: | 0 (0=Alarm, 1=Shutdown) |
| Excitation Loss (Reverse AVR) Trip Value: | 10 (%)(1) |
| Excitation Loss (Reverse AVR) Time Delay: | 3 (Seconds)(1) |
| Generator Over voltage: | 1 (0=Disabled, 1=Enabled) |
| Generator Over voltage Fault Type: | 0 (0=Alarm, 1=Shutdown) |
| Generator Over voltage Trip Value: | 135 (%) |
| Generator Over voltage Time Delay: | 2.0 (Seconds) |
| Generator Under voltage: | 1 (0=Disabled, 1=Enabled) |
| Generator Under voltage Fault Type: | 0 (0= Alarm, 1= Shutdown) |
| Generator Under voltage Trip Value: | 60 (%) |
| Generator Under voltage Time Delay: | 30.0 (Seconds) |
| Loss of Sensing Time Delay: | 2.0 (Seconds) |
| Exciter Diode Monitor Trip Value: | 2.0 (Amps) |
| Fault Reset Too Long: | 1 (0=Disabled, 1=Enabled) |
| Fault Reset Too Long Fault Type: | 0 (0=Alarm, 1=Shutdown) |
| Shutdown Override Flag: | 0 (0=Disabled, 1=Enabled) |
| VAR Integral Gain: | 5 |
| VAR Loop Gain: | 2.5 |
| PF Integral Gain: | 5 |
| PF Loop Gain: | 3 |
| (1) | The default settings for software 279-0916 Generator Set Software Gp and before are 40 (%) and 0.5 (Seconds). |
Uploading Embedded Firmware Using the CDVR PC Software
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.
Flash the CDVR Using Cat ET Software
Refer to Specifications, Systems Operation, Testing and Adjusting, RENR7941, "Parameter Viewing and Configuration (Caterpillar PC Software)" for more information related to this topic.