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The Cat® Electronic Technician (ET) can be used to view certain parameters that can affect the operation of the engine. Cat ET can also be used to change certain parameters. Some parameters cannot be changed and some applications do not allow any changes to the programmable monitoring system. The parameters are stored in the Electronic Control Module (ECM). Some of the parameters are protected from unauthorized changes by passwords. Parameters that can be changed have a tattletale number. The tattletale number shows if a parameter has been changed.The parameters are divided into two different types:Customer Specified Parameters - Customer passwords may be required to change the values of customer specified parameters.System Configuration Parameters - System configuration parameters affect the emissions of the engine or the power of the engine. Factory passwords may be required to change the values of system configuration parameters.
Illustration 1 g06207108
Typical configuration screen
Connect to Cat ET.
Select the Service tab.
Select the Configuration tab to view the configuration parameters.If an ECM is replaced, the appropriate parameters must be copied from the old ECM. Copy the parameters with the "Copy Configuration" feature of the Cat ET. The "Copy Configuration" tab is below the "Configuration" tab. Alternatively, the settings can be recorded on paper and then programmed into the configuration screen that is for the new module.
Changing the parameters during engine operation can cause the engine to operate erratically and can cause engine damage.Only change the settings of the parameters when the engine is STOPPED.
Check Programmable Parameters
Illustration 2 g06207111If a programmable parameter has not been programmed, the ECM will generate a 268-2 or 630-2 diagnostic code. The programmable parameter that is not programmed will be listed under the code. Illustration 2 shows the parameters that are not programmed under the 630-2 code. The unprogrammed parameters will be set to default. Certain aspects of the engines performance and engine monitoring may be affected.If "Injector Trim" is displayed below a 268-2 or 630-2 diagnostic code on Cat ET, refer to Troubleshooting, "Injector Trim File - Install".A complete list of configuration parameters are listed in Table 2.
Table 2
Configuration Parameters for 3512B Engines
ECM Identification Parameters
"Equipment ID"
"Engine Serial Number"
"ECM Serial Number"
"Software Group Part Number"
"Software Group Release Date"
"Software Group Description"
Selected Engine Rating
"Rating Number"
"Rated Frequency"
"Rated Engine Speed"
"Rated Real Genset Power"
"Rated Apparent Genset Power"
"Rated Configuration"
Engine/Gear Parameters
"Gas Substitution System Installation Status"
"Engine Acceleration Ratio"
"Engine State Control Input Configuration"
"Engine State Control Default Value"
"Cooldown Duration"
"Low Idle Speed"
"Engine Speed Droop"
"Droop Mode Selection"
Starting System
"Starting System Selection Mode"
"Starter Pinion Engagement Detection System Enable Status"
"Starting System #1 Assignment"
"Starting System #1 Maximum Number of Crank Cycles"
"Starting System #1 Crank Duration"
"Starting System #2 Assignment"
"Starting System #2 Maximum Number of Crank Cycles"
"Starting System #2 Crank Duration"
"Crank Terminate RPM"
I/O Configuration Parameters
"Desired Speed Input Configuration"
"Secondary Desired Speed Input Configuration"
"Air Shutoff"
"Air Intake Shutoff Detection Installation Status"
"Exhaust Temperature Module Installation Status"
"Emergency Shutdown Override Switch Installation Status"
"Emergency Shutdown Override Input Configuration"
"Remote Emergency Stop (E-Stop) Switch Input Type Configuration"
"Coolant Lever Sensor"
"Direct Fuel Control Mode"
"Desired Engine Rotation Direction Configuration"
"Fuel Correction Factor"
"Ether Solenoid Configuration"
Power Monitoring
"Generator Output Power Primary Input Type Configuration"
"Generator Output Power Primary Input Minimum Data Range"
"Generator Output Power Primary Input Maximum Data Range"
"Generator Output Power Secondary Input Type Configuration"
"Engine Driven Accessory Load Configuration"
"Generator Efficiency"
System Settings
"Governor (Proportional) Gain Percentage"
"Governor (Integral) Stability Percentage"
"Governor Transient Response Loop Gain Percentage"
"FLS"
"FTS"
Security Access Parameters
"CAN Communication Protocol Write Security"
"CAN Communication Protocol Read Security"
"Total Tattletale" Configurable Parameters
The system configuration parameters must be programmed when the application is installed. Program parameters before the initial engine start-up. Incorrect programming of parameters may lead to complaints about performance and/or to engine damage.Data from a gas analysis is required for determining the correct settings for the fuel quality and for the specific gravity of the gas. The data must be entered into the Caterpillar Software, LERW4485, "Gas Engine Rating Pro (GERP)".
Table 3
Configuration Parameters for 3512B Engines
Configuration Parameter Default Value Configurable Options
Engine /Ge