APPENDIX A - FUNCTION BLOCK DESCRIPTIONS

UM344-2

3.Process Variable - When process variable is selected, the input will be displayed in process variable units.

Auto Rerange automatically rescales the Process Variable in proportion to the Measured Variable in the Sensor Input Block. It will also rescale the Measured Variable range if the Process Variable range is changed. For example, if the Measured Variable is set at 0-100 Ohms, and the Process Variable is set at 0-500 deg C, then a change in Measured Variable range to 0-200 Ohms will result in the Process Variable being automatically rescaled to 0-1000 deg C.

A.3 TRANSMITTER ID BLOCK

 

 

Tag

8

Character ASCII

Descriptor

16

Character ASCII

Message

32

Character ASCII

Date Format

DD/MM/YY

Device Serial Number (8 Digit)

0 to 16777215

Short Address

 

 

Analog Mode

0

Digital Mode

1-15

Transmitter ID

Tag

Description

Message

Date

Device Serial Number

Short Address

The Transmitter ID block contains ASCII strings that can be entered to aid in record keeping and identification of the transmitter. These ASCII strings include an 8-character Tag, a 16-character Descriptor, and a 32-character Message. In addition, a date code and an 8-digit Device Serial Number that can be used to identify the transmitter can be entered.

Set the Short Address to 0 to place the transmitter in Analog or Point-to-Point mode. Set the Address to 1-15 for Digital or Multidrop mode.

NOTE

Each transmitter in a Multidrop network must have a unique address. An analog mode transmitter should never be used in a Multidrop network.

A.4 OUTPUT BLOCK

Failsafe Level

Lo, Hi, or Last Value

The Output Block converts the internal 0 to 100% it receives to an output signal. The input to the block represents either the actual Process Variable when the transmitter is configured as a transmitter only, or the valve signal when configured as a controller. A 4 mA signal wll be output if in Digital mode.

Output

+ Failsafe Level 4 - 20 mA -

The failsafe level is the value to which the transmitter output will go if an error is detected while the transmitter is performing its self-diagnostic program. This value may be set at Lo (≤ 4 mA), Hi (≥ 20 mA), or at the last value the transmitter recorded before entering failsafe mode.

A-2

September 1995

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Siemens UM344-2 user manual Transmitter ID Block, Dd/Mm/Yy, Output Block
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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.
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