Electronic Modular Control Panel II (EMCP II) Caterpillar

Normal mode is used in order to monitor the generator set. Normal mode is also used to control the generator set. The GSC controls the engine according to the information which is received from the operator and the information that is received from the engine sensors. The GSC performs the following functions in normal mode:

• Engine starting function

• Monitoring of the important GSC conditions

• Showing the important GSC conditions to the operator

• Fault detection

• Engine stopping

The operator can identify normal mode by observing the display area. When the GSC is in normal mode, all shutdown indicators are OFF. The fault alarm indicator is OFF and "SERV" is NOT SHOWING on the upper display. When the GSC is in normal mode, the engine is able to start or the engine is able to run.

Note: The optional Customer Communication Module (CCM) can remotely control certain generator set functions. This remote control can only occur when the engine control switch (ECS) is in the AUTO position. See Systems Operation, "System Communication Module (Customer)"for more information.

Engine Starting Sequence

1. The GSC receives an engine start signal. The signal will be one of three.
   • The operator turns the ECS to the Manual Start position.

   • The ECS is in the AUTO position and the remote initiate contacts (IC) close.

   • The ECS is in the AUTO position and a start command is sent by the optional Customer Communication Module (CCM).

2. The GSC checks the system before beginning the cranking sequence. The GSC checks that no system faults are present. The GSC checks that all previous shutdown faults have been reset. Note that shutdown faults are removed by turning the ECS to OFF/RESETposition. The GSC also checks that the engine is not already running. If the engine is equipped with prelube, the GSC checks the status of the prelube. If the prelube is not complete, the GSC will not crank the engine.

3. The GSC begins the crank sequence.

   1. On MUI engines, the GSC activates the starting motor relay (SMR) and the run relay (RR).

   2. On PEEC engines, the GSC activates the starting motor relay (SMR) and the run relay (RR). Once activated, the run relay (RR) removes the shutdown signal from the PEEC .

   3. On EUI engines, the GSC activates the starting motor relay (SMR), the run relay (RR) and the electronic governor relay (EGR).

4. The GSC activates the fuel control relay (FCR).

5. The GSC cycle cranks the engine until the cycle crank time reaches the setpoint (P017) for total crank time or until the engine starts. The factory default of the setpoint (P017) is 10 seconds of crank time and 10 seconds of rest time.

6. While the starting motor is cranking, the GSC shows the status of the relays on the relay status indicators of the lower display.
   • ETR fuel systems: K4 (SMR), K5 (RR), K7 (FCR)

   • ETS fuel systems: K4 (SMR), K5 (RR)

   • On EUI engines, K1 (EGR) is also shown

7. The GSC deactivates the starting motor relay (SMR) and the GSC activates the crank termination relay (CTR) when the engine speed reaches the setpoint P011 for crank terminate speed. The factory default of setpoint P011 is 400 rpm.

8. For MUI engines, the GSC activates the electronic governor relay (EGR) when the oil pressure reaches setpoint P014. Setpoint P014 is for low oil pressure at idle speed. The factory default of setpoint P014 is 70 kPa (10 psi). The EGR signals the certain types of electronic governor (EG) in order to accelerate the engine to the rated speed. On PEEC engines, the EGR signals the PEEC in order to accelerate the engine to the rated speed.

   Note: The electronic governor relay (EGR) is not used on "8NS" or "9ES" generator sets.

   Note: The optional customer communication module (CCM) can remotely activate the EGR when the low oil pressure setpoint is exceeded. The optional customer communication module can remotely deactivate the EGR when the low oil pressure setpoint is exceeded.

9. The GSC shows the following information.
   • Information for one or more phases on the upper display

   • Information for power meter on the lower display

   • Information for the engine system on the lower display

   • For ETR fuel system, the relay status of K1 (EGR), K3 (CTR), K5 (RR), and K7 (FCR) on the lower display

   • For ETS fuel system, the relay status of K1 (EGR), K3 (CTR), K5 (RR) on the lower display

Engine Stopping Procedure

1. The GSC will receive an engine stop signal. The signal will be one of three.
   • The operator turns the ECS to the STOP position.

   • The ECS is in the AUTO position and the remote initiate contacts (IC) open.

   • The optional customer communication module (CCM) sends a stop command to the GSC while the ECS is in the AUTO position and while the remote initiate contacts are open.

2. After receiving the stop signal, the GSC checks that there are no present system faults.

3. The GSC begins the cooldown period. The cooldown period is the setpoint P019. The factory default of setpoint P019 is five minutes.

4. The GSC may now activate the spare output. The spare output is activated only if the spare output SP07 has been programmed for this purpose. The spare output can activate the slave relay during the cooldown cycle. The optional circuit breaker is then activated and this takes the generator off load.

5. After the cooldown cycle (setpoint P019), the GSC deactivates the run relay (RR). The electronic governor relay is deactivated after the engine oil pressure decreases to less than the setpoint for low oil pressure shutdown at idle speed (SP14).

   1. On MUI and EUI engines, the GSC shuts off fuel by deactivating the fuel control relay (FCR).

   2. On PEEC engines, the run relay (RR) sends a shutdown signal to the PEEC. The PEEC turns off the fuel shutoff solenoid which shuts down the engine.

6. When the engine speed reaches zero rpm, the GSC deactivates the crank terminate relay (CTR) and a restart is now allowed.

   Before the engine speed reaches 0 rpm, a restart of the engine is possible. When the GSC receives an engine start signal, the GSC turns on the fuel and the GSC allows the engine to run. If the engine does not run, the starting motor relay (SMR) does not activate until the crank termination relay (CTR) is deactivated at 0 rpm.

7. The GSC shows the status of the relays on the relay status indicator of the lower display. All relay indicators should be "OFF" except on ETS systems. On the ETS systems, the "K7" indicator remains active for 70 seconds after the engine speed and oil pressure are at zero.

Note: The engines can be shut down immediately by turning the ECS to the OFF/RESET. The cooldown timer is bypassed and the spare data output is deactivated.