UM344-2CALIBRATION AND MAINTENANCE

TABLE 6.2

Message - No Transmitter Found, Continued

 

 

 

Possible Cause: Loop Power

 

Check power supply output voltage for installed network resistance:

Supply Failure

 

17 Vdc minimum at 250Ω

 

 

42 Vdc maximum at 1100Ω

 

 

Check power supply for blown fuse or tripped circuit breaker

Possible Cause: Transmitter

 

Replace Electronics Module. Refer to Section 6.5.2.

Electronics Module Failure

 

 

 

 

 

TABLE 6.3 Message - Communication Error

This message results when, after having successfully established communications with a transmitter, an error flag is detected in a received message and the message is not accepted. Error types are: Vertical Parity Error, Overrun Error, Framing Error, Longitudinal Parity Error, and Buffer Overflow.

 

 

POSSIBLE CAUSE

CORRECTIVE ACTION

 

 

Possible Cause: Noise on Loop

Press RETRY (F3) at least 3 times, waiting at least 1 minute between retries. If

Wires

not successful, continue troubleshooting

Loop Wiring Failure

Check for 12 Vdc minimum across SIGNAL +/- terminals in transmitter terminal

 

compartment.

 

Check polarity of loop wiring.

 

Check that loop resistance is between 250Ω and 1100Ω to support HART

 

communications.

 

Check for loose or broken loop wiring at power supply terminals, Supply

 

Barriers (if used), junction boxes, and transmitter terminal compartment.

 

Check for disconnected or broken Current Sense Resistor.

 

Check for short between cable shield and SIGNAL + loop wire.

 

Check for accumulation of moisture in transmitter terminal compartment.

 

Check for the proper type and length of loop cable and for electrical

 

interference between the loop cable and any adjacent cables in a cable tray or

 

conduit.

Loop Power Supply Failure

Check power supply output voltage: 17 Vdc minimum, 42 Vdc maximum.

 

Check power supply for blown fuse or tripped circuit breaker.

Transmitter Electronics Failure

Replace Electronics Module. Refer to Section 6.5.2.

 

 

September 1995

6-21

Page 123
Image 123
Siemens UM344-2 user manual Message Communication Error, Message No Transmitter Found

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.