Electronic Modular Control Panel II (EMCP II) For PEEC Engines Caterpillar

The normal mode monitors the generator set and the normal mode controls the generator set. The GSC controls the engine through information that is received from panel switches, controls, and engine sensors. The GSC performs the following functions in normal mode.

• Starting the engine

• Monitoring of important conditions for the generator set

• Showing important conditions of the generator set to the operator

• Fault Detection

• Engine Stopping

The operator can identify the normal mode by observing the display area. When the GSC is in the 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.

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

Engine Starting Sequence

1. The GSC will receive 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/RESET. The GSC also checks that the engine is not already running.

3. The GSC activates the starting motor relay (SMR) and the run relay (RR). The activated run relay removes the shutdown signal from the PEEC electronic control module.

4. The GSC activates the fuel control relay (FCR). This is not used in applications of the PEEC electronic control module.

5. The GSC cycle cranks the engine until the cycle crank time reaches the setpoint (P17) for total cycle crank time or until the engine starts. The factory default of setpoint P17 is 10 seconds crank time and 10 seconds rest.

6. While the starting motor is cranking, the GSC shows the status of the relays on the relay status indicators of the lower display. The relays that are shown are K4 (SMR), K5 (RR), and K7 (FCR).

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 P11 crank terminate speed. The factory default of setpoint P11 is 400 rpm.

8. The GSC activates the oil step relay (OSR) when the oil pressure reaches the setpoint P14 for low oil pressure at idle speed. The factory default of setpoint P14 is 70 kPa (10 psi). The OSR signals the PEEC electronic control module to accelerate the engine to rated speed.

   Note: The optional Customer Communication Module (CCM) can remotely activate the OSR when the low oil pressure setpoint is exceeded. The optional Customer Communication Module (CCM) can remotely deactivate the OSR when the low oil pressure setpoint is exceeded.

9. The GSC shows AC voltage, current, and frequency for one phase at a time on the upper display. The GSC shows system battery voltage, engine hours, engine rpm, oil pressure, and coolant temperature on the lower display. The GSC shows the relay status on the relay status indicators of the lower display. The status is shown for the relays K1, K3, K5, and K7.

Engine Stopping Sequence

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

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

3. The GSC begins the adjustable cooldown period (setpoint P19). The factory default of setpoint P19 is five minutes.

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

5. After the cooldown period (setpoint P19), the GSC deactivates the run relay (RR). The normally closed contacts of the run relay now send a shutdown signal to the PEEC electronic control module. The PEEC turns off the fuel shutoff solenoid which shuts down the engine.

   The OSR is deactivated after the engine oil pressure drops below the setpoint P14.

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

   If the GSC receives a start signal before the engine speed reaches zero rpm. Then, 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 indicators of the lower display. All relay indicators should be OFF.

Note: The engine may be shutdown by turning the ECS to OFF/RESET. The cooldown timer is bypassed and the spare data output is deactivated.