3500B High Displacement Generator Set Engines Programmable System Parameters Caterpillar


Programmable System Parameters
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1.1. Configuration Parameters
2.2. Air Shutoff
3.2. Cold Cylinder Cutout
4.2. Droop
5.2. Ether Control
6.2. Fuel Correction Factor
7.1. Display of Engine Performance
8.2. Histogramming
9.2. Incrementing the Hours of the ECM
10.2. Adjusting the Total Fuel Consumption for the ECM
11.1. Data Link Features
12.2. CAT Data Link Flash
13.2. Secondary CAT Data Link

Configuration Parameters

Configuration parameters concern various engine features. Some parameters can affect the performance of the engine. Most of the parameters may be programmed with an Electronic Technician (ET) service tool. Some of the parameters require a password in order to be programmed.

Note: For information on programming the parameters, use the appropriate ET service tool and see the Service Manual, "Troubleshooting" module.

Some parameters may not be available on all applications. If a parameter is not available the ET service tool will indicate that the parameter is "unavailable" when the parameter is selected.

Table 1 is a list of typical configuration parameters.

Table 1
Typical Configuration Parameters    
Parameter     Programmability    
"Air Shutoff" (ON/OFF)     Yes    
"AVS Datalink #2 ID"     Yes    
"Crank Duration"     Yes    
"Crank Terminate Speed"     Yes    
"Cold Cylinder Cutout"     Yes    
"Cooldown Speed"     Yes    
"ECM Serial Number"     No    
"Engine Accel. Rate"     Yes    
"Engine Cooldown Duration"     Yes    
"Engine Cooling System Config." (1)     Yes    
"Engine Pre-Lube Duration"     Yes    
"Engine Serial Number"     Yes    
"Equipment ID"     Yes    
"Ether Control" (ON/OFF)     Yes    
"Fuel Correction Factor"     Yes    
"Fuel Ratio Control Offset"     Yes    
"Low Idle Speed"     Yes    
"Maximum No of Crank Cycles"     Yes    
"Personality Module Part Number"     Software dependent    
"Personality Module Release Date"     Software dependent    
"Rated Engine Speed"     Software dependent    
"Rated Fuel Position"     Yes    
"Total Tattletale"     No    
( 1 ) Jacket water aftercooling or separate circuit aftercooling

The following parameters are programmed at the factory to "0":

  • "Crank Duration"

  • "Maximum Number Of Crank Cycles"

The "0" settings prevent the Electronic Control Module (ECM) from engaging the starting motors. The settings must be reprogrammed before the engine will crank.

Ensure that the "Air Shutoff" and the "Ether Control" parameters are "Enabled/ON" (if equipped). If the engine does not have these options, ensure that these two parameters are "DISABLED/OFF".

If the engine is equipped with Prelube, the "Engine Prelube Duration" must be programmed to a value that is greater than "0" seconds. Otherwise, the prelube pump will not cycle. If the engine is not equipped with Prelube, the parameter must be programmed to "0".

The engine will have either jacket water aftercooling or separate circuit aftercooling. The correct configuration of the aftercooling system must be programmed.

No password is required for programming a new ECM during the first 100 hours of service life. This 100 hour "free configuration" feature enables the customer to tailor the programmable setpoints to the requirements of the installation. Exceptions are "Fuel Limit" and "Personality Module Mismatch".

Air Shutoff

Note: This is an optional feature.

The air shutoff uses a plate that slides when the mechanism is activated in order to shut off inlet air to the aftercooler. The engine stops because of the restricted air supply to the combustion chamber. The air shutoff only actuates for the following conditions:

  • The Emergency Stop button is pressed.

  • An overspeed shutdown occurs.

  • The operator manually activates the air shutoff with the emergency air shutoffs on the engine.

The air shutoffs must be reset before the engine is restarted.




Illustration 1g00393147

Reset knob for the air shutoff

To reset the air shutoff, turn the reset knob to the "OPEN" position.

Ensure that the air shutoffs are reset.

Cold Cylinder Cutout

Note: This feature can be enabled or disabled with an electronic service tool.

The Cold Cylinder Cutout feature provides the following benefits:

  • Reduction of white smoke during cold starting

  • Reduction of the duration of advanced timing (cold mode)

  • Reduction of ether injection

The ECM automatically turns off one electronic unit injector at a time during the following occurrences:

  • Cold start-up

  • Extended time at low idle

The ECM monitors the change of the fuel rack in order to determine if a cylinder is firing. If the cylinder is firing the ECM activates the electronic unit injector. If the cylinder is not firing the electronic unit injector remains deactivated. This reduces white smoke.

The following conditions must be met in order to activate the Cold Cylinder Cutout:

  • The Cold Cylinder Cutout parameter is programmed to "ENABLE".

  • The fuel rack is less than 13 mm (0.5 inch).

  • The temperature of the jacket water is less than 63 °C (145 °F).

The Cold Cylinder Cutout strategy is activated under either of the following conditions:

  • Ten seconds after the engine reaches the low idle rpm

  • Three seconds after ether injection is completed

The following conditions will deactivate the Cold Cylinder Cutout:

  • The Cold Cylinder Cutout parameter is programmed to "DISABLED".

  • The temperature of the jacket water is more than 70 °C (158 °F).

  • An ET service tool is used to test for the cold cylinder cutout.

  • The ether injection system is used.

  • The coolant temperature sensor has failed.

  • The engine is operating at a certain rpm when the Cold Cylinder Cutout is activated. If the engine rpm then varies by more than 50 rpm, the feature is deactivated for three seconds. A new engine speed is established when the feature is reactivated.

  • The engine is at low idle rpm for ten seconds. If the engine speed is then reduced by more than 50 rpm, the Cold Cylinder Cutout is deactivated for 30 seconds.

  • If the fuel rack is greater than 13 mm (0.5 inch), the Cold Cylinder Cutout is deactivated for one second.

Droop

This feature enables an engine to share a load with other engines. If an engine is operating at high idle rpm and a load is applied, the engine rpm is reduced. The engine rpm is reduced as the load increases. This reduction in rpm is the droop. The droop can be programmed from zero to ten percent. If the percent of droop is equal for two identical engines in parallel operation, the engines share the load equally.

Ether Control

Note: This is an optional feature.

The ECM automatically injects ether into the air inlet manifold when the following conditions are met:

  • The engine rpm is greater than 75 rpm.

  • The temperature of the jacket water is below 31 °C (88 °F).

The duration of ether injection varies linearly with the temperature of the jacket water. The duration of ether injection varies within the following range:

  • 10 seconds at the maximum temperature of 30 °C (86 °F)

  • 130 seconds at the minimum temperature of -40 °C (-40 °F)

The longest duration of ether injection is 130 seconds even if the temperature of the jacket water is less than -40 °C (-40 °F). See Illustration 2.




Illustration 2g00769594

Temperature of the jacket water and duration of ether injection

(Y) Temperature in °C

(X) Time in seconds

A switch is installed on the control panel or the instrument panel. The switch enables the operator to inject ether manually under the following conditions:

  • The switch for ether injection is in the manual position.

  • The engine rpm is greater than 75 rpm.

  • The temperature of the jacket water is less than 31 °C (88 °F).

Fuel Correction Factor

When the engine is shipped from the factory, an estimate of the engine's fuel consumption is programmed into the ECM. The estimate is based upon the engine's performance specifications. The actual fuel consumption can be determined with a meter that measures the flow of the fuel. Customers are likely to find a slight difference between the estimate of fuel consumption that was programmed and the actual fuel consumption. The customer can use an ET service tool to program the ECM for the actual fuel consumption. A factory level security password is required in order to change this parameter.

To program the ECM for the actual fuel consumption, change the Fuel Correction Factor that is already programmed into the ECM. The Fuel Correction Factor can be programmed in increments of 0.5 percent between ± 25 percent.

Display of Engine Performance

Histogramming

The ET service tool can display the trends of the engine performance. The information can be used to improve the overall performance of the engine. The historical information is stored in a format that can be used to construct histograms. Data is available for the following parameters:

  • Engine rpm

  • Percent of engine load

  • Left side exhaust temperatures

  • Right side exhaust temperatures

Incrementing the Hours of the ECM

A new ECM that is installed on an engine can be programmed to display the correct total number of operating hours for that engine. An ET service tool and a factory level security password are required.

Adjusting the Total Fuel Consumption for the ECM

A new ECM that is installed on an engine can be programmed to display the correct total fuel consumption for that engine. An ET service tool and a factory level security password are required.

Data Link Features

AVS Data Link Flash

Flash - This is a method of downloading or programming electronic information.

The AVS Data Link Flash provides the capability to flash the software for the engine control with the AVS Data Link.

Secondary AVS Data Link

The Secondary AVS Data Link provides the ability for each ECM to have a AVS Data Link that is "local" to that engine. This feature also provides a common data link to other engine controls. This enables the operator to communicate with multiple engines through a single Customer Communication Module (CCM).

The Secondary AVS Data Link provides the capability for two to eight engines to communicate via a single CCM.

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