UM344-2

CALIBRATION AND MAINTENANCE

MXC STATUS and Diagnostic Displays require fault-free HART communications between the MXC and the transmitter. In the event of communication problems, the MXC can display communication error messages. Refer to Section 6.3.2.1, paragraph B for details.

B. Optional Digital Meter

The Model 344 routinely performs self-diagnostic tests and will display the message “FAIL” if a fault is detected. If the controller function is “OFF” the LCD will flash whenever the process temperature is over or under the range limits by 3%.

C.Console Station, Work Station or Controller

Troubleshooting information can be displayed on a video monitor associated with a console station or work station that is configured to monitor the loop. Refer to the literature supplied with the station.

A panel mounted controller or other station accepting a loop signal generated by a transmitter, or using HART signals to communicate with a transmitter, can display information about the status of the loop and transmitter. Again, refer to the literature supplied with the station.

6.3.2 Troubleshooting

The following procedures can assist maintenance personnel in identifying and isolating a transmitter or loop problem and its source. Diagnostic messages and symptoms related to transmitter malfunction help in diagnosing a problem. Begin troubleshooting by noting the diagnostic message or symptom that accompanies a transmitter malfunction.

6.3.2.1 Diagnostic Messages

Transmitter diagnostic messages consist of displays initiated by transmitter self-diagnostics (paragraph A) or communication warnings (paragraph B) shown on an MXC.

A.Transmitter Self-Diagnostics

Microprocessor initiated transmitter self-diagnostics perform tests on the Electronics Assembly but not the temperature measuring sensor.

NOTE

Faults such as a failed digital meter or erratic sensor are not detectable by the self-diagnostics.

A transmitter failing its self-diagnostics can result in one of the following displays. Perform the procedure given below to access the diagnostic displays and remedy the problem.

September 1995

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Siemens UM344-2 user manual Troubleshooting, Diagnostic Messages

UM344-2 specifications

The Siemens UM344-2 is a cutting-edge industrial controller designed to meet the demands of modern automation and control systems. This powerful device is specifically developed for use in various applications, including manufacturing, process control, and machinery integration. The UM344-2 stands out for its versatility and robust performance in harsh industrial environments.

One of the main features of the Siemens UM344-2 is its high processing speed, which allows for real-time data processing and decision-making. The controller utilizes advanced microprocessor technology, ensuring quick response times and efficient operation. Its architecture supports multitasking, enabling it to manage multiple processes simultaneously without compromising performance.

The UM344-2 features a modular design, which provides flexibility in configuration and scalability. Users can easily add or remove modules to tailor the system to specific application requirements. This adaptability is beneficial for businesses that need to scale their operations or adjust to changing production demands. The controller is compatible with a variety of I/O modules, allowing for seamless integration with other equipment and systems.

In terms of connectivity, the Siemens UM344-2 supports various communication protocols, including Profibus, Profinet, and Ethernet. This versatility ensures smooth data exchange between the controller and other devices in the automation ecosystem, facilitating comprehensive monitoring and control. The inclusion of these communication standards enhances interoperability and allows for the integration of legacy systems with newer technology.

The Siemens UM344-2 is equipped with advanced diagnostic tools, which enable users to monitor system performance and detect potential issues in real-time. This feature reduces downtime and maintenance costs by allowing for proactive management of the system. The controller also supports remote access capabilities, enabling technicians to troubleshoot and configure systems from off-site locations.

Safety is a critical consideration in industrial environments, and the UM344-2 is designed with this in mind. It incorporates safety-certified features, ensuring compliance with international safety standards. Users can implement safety functions directly within the controller, streamlining system design and reducing the need for external safety components.

Overall, the Siemens UM344-2 exemplifies the fusion of technology and practical application, making it an essential component for businesses looking to enhance their automation processes. With its high performance, flexibility, and focus on safety, the UM344-2 is a reliable choice for industries aiming for efficiency and innovation in their operations.