DEIF Multi line 2 Option X Guide

CAN 2: CAN bus communication and status relay output

Terminal resistance: DIP switch 1 is used to enable 120 Ω terminal resistance, switch 2 is not used

5.4 Wiring method

AOP-2 also supports two types of cables:

Cable type 1 wiring

Pin color signal

1 Red/White CAN H

2 brown/white CAN GND

3 Red CAN L

4 brown unused

5 Black/White+5 VDC

6 Black GND

Cable type 2 wiring

Cable type 2 uses different color coding schemes, and detailed diagrams in the documentation should be referred to when wiring.

Power supply: AOP-2 is delivered with a DC/DC converter and two 1-meter-long cables, one end of which has an RJ12 plug and the other end is a stripped end.

Cable requirements: The cable between terminals should be shielded twisted pair.

5.5 Terminal Resistance Configuration

Same as DU-2:

Number of connected devices, terminal resistance setting

DIP switch 1 for both devices is set to ON

Set DIP switch 1 of the first and third devices to ON

Set the first and last devices on more than 3 CAN buses to ON

5.6 CAN ID Configuration

Configuration steps:

Press buttons 7 and 8 simultaneously to activate the CAN ID change menu

The LED corresponding to the current CAN ID will light up

LED 16 starts flashing

Use button 7 (increase) and button 8 (decrease) to change the CAN ID

CAN ID indication

0 CAN bus is turned off, LED 16 is flashing

1 LED 1 constantly on+LED 16 flashing (default value)

2 LED 2 constantly on+LED 16 flashing

3 LEDs are always on+16 LEDs are flashing

4 LEDs are always on+16 LEDs are flashing

5 LED 5 constantly on+16 LED flashing

Press button 6 to save the CAN ID and return to normal operation mode

5.7 Status Relay

AOP-2 has a built-in status relay that activates approximately 5 seconds after the device is powered on. This relay can be used for:

Remote status indication

Fault alarm output

System interlocking control

5.8 Lamp testing and dimming function

AOP-2 is equipped with an independent light test/dimming button:

Lamp testing function: Short press the button to activate the lamp testing function, and all LEDs will light up. If there is no further operation within 3 seconds, AOP-2 will return to the normal display state.

Dimming function: Pressing the button continuously or multiple times can cyclically adjust the LED brightness to achieve the desired light intensity.

5.9 Programming Methods

AOP-2 is programmed using the same PC utility software as AOP-1.

Chapter 6 Multi device Collaborative Work

6.1 System Topology Structure

The complete Option X system can include:

1 Multi line 2 controller

1 main DU-2 display unit (CAN ID=1, connected to ML-2)

Up to 2 additional DU-2 display units (CAN ID=2 and 3)

Each DU-2 can connect up to 1 AOP-1 (via serial interface, distance ≤ 0.5 meters)

Up to 5 AOP-2 operation panels (via CAN bus, distance ≤ 200 meters)

6.2 Communication bus requirements

CAN bus specifications:

Maximum length: 200 meters

Cable type: shielded twisted pair cable

Terminal resistance: 120 Ω at each end

CAN ID must be unique and cannot be duplicated

6.3 Error Handling

Repeat CAN ID detection

When DU-2 detects devices with the same CAN ID on the CAN bus, it will display a warning message:

"Warning: Two displays have same CAN ID Press Enter."

After pressing ENTER, the CAN ID change menu will automatically display, and the user can select another CAN ID for the current device.

Chapter 7 Application Scenarios and Selection Suggestions

7.1 Large power plant control room

Requirement: The main control room, engineer station, and on-site operation points all need to monitor the generator set

Solution:

Install main DU-2 (with full read-write permission) in the main control room

Engineer station installation auxiliary DU-2 (read-only permission)

On site installation of AOP-2 (via CAN bus, with a distance of up to 200 meters)

Each DU-2 can be connected to AOP-1 extension local buttons and LED indicators

7.2 Distributed power plants

Requirement: Multiple generator sets are arranged in a dispersed manner and require centralized monitoring

Solution:

Each generator set is equipped with ML-2 controller and DU-2

Connect all DU-2 to the central control room via CAN bus

The central control room is equipped with a main DU-2, which can monitor all units

7.3 Ship Power System

Requirement: Operating interfaces are required for the cabin, driver's cab, and control room

Solution:

Cabin installation of main DU-2 and AOP-2

Driver's cab installation auxiliary DU-2 (read-only mode)

Install AOP-2 in the control room for alarm confirmation and status indication

Chapter 8 Troubleshooting Guide

8.1 DU-2 communication failure

Possible causes and solutions for the phenomenon

Unable to communicate with other DU-2. Check for CAN ID setting errors and ensure that the CAN ID is unique and correct

Unable to communicate with ML-2 protocol selection error. Choose the correct protocol based on ML-2 software version

Intermittent communication interruption. Terminal resistance not set correctly. Ensure that 120 Ω terminal resistance is enabled at both ends of the bus

Insufficient communication distance and cable quality issues. Use shielded twisted pair cables to avoid parallel wiring with power lines

8.2 AOP-1/AOP-2 malfunction

Possible causes and solutions for the phenomenon