DEIF PPM Power Management System Operation and Troubleshooting

DEIF PPM Power Management System Operation and Troubleshooting Complete Guide

In ship electric propulsion systems, offshore platform power stations, and large emergency power stations, the DEIF PPM (Power Management) power management system serves as the core control unit, undertaking key tasks such as automatic parallel operation of multiple generator sets, load distribution, overload inquiry, and unloading of non critical loads. Its highly integrated HMI human-machine interface, flexible AOP-2 operation panel, and powerful Utility Software upper computer software provide operators with a complete toolchain from on-site monitoring to remote parameter tuning. However, faced with complex menu levels, numerous protection parameters, and potential communication failures, on-site engineers often need a detailed guide from a practical perspective. This article is based on the PPM operation manual (version 2.40.0 and above), which systematically sorts out human-computer interaction, alarm handling, parameter tuning, and typical fault mode analysis, helping operation and maintenance personnel quickly get started and calmly deal with various abnormalities.

Overview of Human Computer Interface System

The PPM system provides four complementary human-computer interaction pathways, covering on-site, remote, and debugging scenarios:

Display Unit: Connected to the main controller via a 9-pin Sub-D cable, it provides a 4-line x 20 character backlit LCD text display, equipped with 14 status LEDs and 6 navigation buttons (up, down, left, right, enter, return). Suitable for daily data reading, alarm confirmation, and simple parameter modification.

AOP-2 additional operation panel: connected to the main unit through an internal CAN bus, with a maximum distance of 500 meters. The panel provides 16 LED status lights and 8 function buttons for power station mode selection (semi-automatic/automatic/shaft generator/shore power/split bus), overload inquiry, safety parallel operation, and light testing. The meaning of LED light colors is clear: green indicates activation, yellow indicates status switching or request not confirmed, and red indicates serious alarm or lockout.

Utility Software upper computer software: Connected via USB or Modbus (RS-485/Ethernet), it provides graphical parameter browsing and modification, real-time trend recording, event log export, and firmware upgrade functions.

External alarm and monitoring system: Connected to third-party SCADA through RS-485 RTU or Ethernet TCP/IP Modbus, supporting DNP3.0 and MODBUS protocols.

Detailed explanation of display unit operation

1. Quick reading of LED status lights

The 14 LEDs on the display unit panel provide real-time status perception for operators:

Alarm (red): Flashing indicates the presence of an unconfirmed alarm; Constant illumination indicates that all alarms have been confirmed but there are still faults present.

Alarm inh. (yellow): An alarm has been suppressed or an external suppression input has been activated.

Cool. down (green): The cooling shutdown process is in progress.

Run (green): The generator is in operation.

Ready (green): The controller is ready to start.

Deload (yellow): Load shedding function activated, ready to disconnect.

On (green/yellow): Green indicates that the circuit breaker has been closed; Yellow indicates that the synchronization function is in progress.

PMS control (green): The unit is under power management control; Extinguishing is controlled locally.

Regulator on (green): Load distribution function activated.

1st Standby (green): This diesel engine is the next unit to be started.

Base load (green/yellow): Green indicates activation of the base load function; Yellow indicates that the base load has been selected but not activated.

Power (green): The auxiliary power supply has been connected.

Self check OK (green): Controller self-test passed.

1st Prior (green): This unit has the first startup priority.

2. Menu Structure and Navigation

The menu system is divided into two major systems: the "View" menu and the "Setup" menu

View menu (V1, V2, V3): used for daily operation monitoring. V1 can contain up to 15 user-defined windows (such as generator voltage, current, power, frequency, etc.), which can be manually switched by pressing the up and down keys; V2 and V3 automatically switch based on the unit status (start preparation → synchronization → load lifting → normal operation), without the need for manual intervention. In actual operation, the first line of V3 dynamically displays the current status text, such as "FIxed Frequency", "Gov LOAD SHARING", "RAMP DOWN", etc., which complement the specific measurement values displayed in the second and third lines.

Setup menu: divided into four submenus: PROT (protection), CTRL (control), I/O (input/output), SYST (system). Before entering, you need to enter a password (factory default 2000), and if there is no operation for 3 minutes, it will automatically exit and you need to log in again.

Engineering Tip: The display content in the View menu can be cropped through the "User View Configuration" function of Utility Software. It is recommended to place the most important parameters (such as power, current, frequency) in the first 5 windows for quick viewing.