How to install GE IC695CRU320 redundant control unit?

Controller compatibility

The primary and backup controllers must be RX3i CPU modules of the same model, supporting models including IC695CPU315, IC695CPU330, IC695CPU340, and the CPU firmware version must be consistent (recommended V3.0 and above).

Environmental Requirements

The installation environment should be kept away from strong electromagnetic interference (such as frequency converters, high-power motors), and avoid sudden temperature changes or dusty/humid environments;

Reserve a heat dissipation space of ≥ 50mm around the module to ensure good heat dissipation (without forced air cooling, the ambient temperature does not exceed 55 ° C).

（2） Configuration steps

Hardware Installation

Insert IC695CRU320 into the dedicated slot of RX3i rack and tighten the panel screws;

Connect the synchronization interface between IC695CRU320 and the main and backup controllers using a synchronous cable (twisted pair or fiber optic);

Connect the power supply, I/O module, and communication module separately for the primary and backup controllers (ensuring consistent configuration of primary and backup I/O).

Software configuration (via Proficy Machine Edition)

Create a new RX3i redundancy project, select the "dual machine redundancy" architecture, specify the primary and backup CPU models and IC695CRU320 as redundant control units;

Configure synchronization parameters (such as synchronization rate, timeout) to enable the "automatic switching" function;

Download the program to the main controller, and the software will automatically trigger the synchronization of primary and backup data. After the synchronization is completed, the redundant system will enter the "normal operation" state.

Compatibility and selection suggestions

（1） List of compatible hardware

Example of compatible device types and models

RX3i Controller IC695CPU315 (Compact), IC695CPU330 (Standard), IC695CPU340 (High Performance)

RX3i rack IC695CHS012 (12 slots), IC695CHS024 (24 slots), IC695CHS008 (8 slots, small system)

Redundant I/O modules IC695RIO001 (remote I/O adapter), IC695RIO002 (redundant I/O interface module)

Communication modules IC695ETM001 (Ethernet module), IC695COM001 (RS485 module)

（2） Selection suggestions

Applicable scenarios

Industrial scenarios that require continuous operation, such as chemical production lines, power dispatch systems, water treatment equipment, etc., require a system availability requirement of ≥ 99.99%.

Selection precautions

The primary and backup controllers need to be completely consistent (model, firmware version, memory configuration) to avoid synchronization failure due to hardware differences;

If the system includes remote I/O, redundant I/O modules (such as IC695RIO002) should be used to ensure that the I/O layer also has redundancy capability;

It is recommended to use shielded twisted pair cables (short distance, ≤ 100m) or multimode optical fibers (long distance, ≤ 2km) for synchronous cables to reduce synchronization anomalies caused by interference.

Troubleshooting and Maintenance

（1） Common faults and solutions

Possible causes and solutions for the fault phenomenon

The redundant status light "FAULT" is always on. 1. The synchronization link between the primary and backup controllers is interrupted; 2. The firmware versions of the primary and backup CPUs are inconsistent; 3. CRU module hardware failure: 1. Check the synchronization cable connection and replace the faulty cable; 2. Upgrade the primary and backup CPUs to the same firmware version; 3. Replace the IC695CRU320 module

Primary/backup switching failure: 1. Backup controller data synchronization is not completed; 2. The switch enable is not turned on; 3. Inconsistent I/O configuration: 1. Wait for synchronization to complete (the synchronization light is always on to indicate completion); 2. Enable "automatic switching" in the software; 3. Verify the primary and backup I/O configurations to ensure consistency

The backup controller cannot synchronize. 1. Poor contact of the synchronization interface; 2. Memory error in the main controller; 3. CRU synchronization logic fault 1. Re plug and unplug the synchronization cable, clean the interface; 2. Restart the main controller and check the memory status; 3. Reset CRU module (via software or power off restart)

（2） Daily maintenance suggestions

Regularly (every 3 months) check the redundancy status indicator lights to confirm that the primary and backup are running normally and the synchronization link is normal;

Export redundant system diagnostic logs through Proficy Machine Edition every 6 months to analyze potential risks such as frequent synchronization failures and switching records;

Avoid plugging and unplugging CRU modules or synchronous cables while they are live to prevent hardware damage; When replacing modules, power off first to ensure that the primary and backup controllers are in a "stop" state.