3500B Marine Engines Caterpillar

System Configuration Parameters are parameters that affect emissions, power of the engine, and other features. The parameters are programmed at the factory. In most cases, the parameters do not need to be changed. The System Configuration Parameters must be reprogrammed if an Electronic Control Module (ECM) is replaced and/or the engine rating is reprogrammed. System Configuration Parameters do not need to be reprogrammed if the Personality Module is replaced. Proper values for these parameters are available on the Caterpillar Electronic Technician (ET). Certain Configuration Parameters are also stamped on the Engine Information Plate.

Note: If the parameters that are protected with the factory passwords are changed, the Caterpillar warranty may be voided.

Engine Serial Number

The engine serial number should be programmed to match the engine information plate. The serial number is not programmed on a new ECM.

Fuel Ratio Control (FRC) Offset

The ECM determines a value that is based on the atmospheric pressure. The value is used to adjust the fuel ratio control. This will control the exhaust while the engine accelerates. An offset value of ± 25 may be used to adjust for customer preference, fuel quality or other factors that affect engine performance.

Note: This parameter may not be available on all applications.

Rated Fuel Position

This parameter is used to set engine power. A Factory Password is required to change this setting.

Table 1

Minimum	Default	Maximum
Minimum Rack	Engine Dependent	Engine Dependent

Low Idle

The parameter defines the lowest rpm level.

Table 2

Minimum	Default	Maximum
300 rpm	600 rpm	900 rpm

Cooldown Speed

This parameter defines the engine rpm level when the Engine Control Switch (ECS) is placed in the STOP position.

Table 3

Minimum	Default	Maximum
300 rpm	600 rpm	1600 rpm

Cooldown Period

This parameter defines engine operation at the cooldown speed. Programming this parameter to 0 will disable this function.

Table 4

Minimum	Default	Maximum
0 minutes	5 minutes	30 minutes

Prelube Time

This parameter sets the engine prelubrication timeout period. Programming this parameter to 0 will disable this function.

Table 5

Minimum	Default	Maximum
0 seconds	0 seconds	210 seconds

Crank Duration

The crank duration determines when the starting motors will be energized. The crank duration determines when the starting motors will be disengaged. Programming this parameter to 0 will prevent the ECM from engaging the starting motors.

Table 6

Minimum	Default	Maximum
0 seconds	0 seconds	60 seconds

Cranking Cycles

This parameter is the total number of crank cycles that can be performed.

Table 7

Minimum	Default	Maximum
0	0	10

Crank Terminate Speed

This parameter determines when the starting motor will disengage.

Table 8

Minimum	Default	Maximum
100 rpm	400 rpm	500 rpm

Air Shutoff

Programming the parameter to "OFF" will disable the air shutoff. This parameter should be programmed to "OFF" if the function is not being used or installed on this engine. This will prevent diagnostics from being logged.

Note: This parameter can only be read from the secondary ECM.

Table 9

Minimum	Default	Maximum
DISABLED	ENABLED	ENABLED