UM344-2

APPENDIX A - FUNCTION BLOCK DESCRIPTIONS

A.5 ALARM BLOCK

 

Alarm 1

Enable/Disable

Alarm 1 Setpoint

-999999 to 999999

Alarm 1 Type

High/Low

Alarm 2

Enable/Disable

Alarm 2 Setpoint

-999999 to 999999

Alarm 2 Type

High/Low

Self Clearing NAKS

On/Off

Alarms Out Of Service

On/Off

Alarm

Absolute Alarm #1

Absolute Alarm #2

This function block includes 2 absolute alarms. The action of these alarms can be selected as HI or LO. The setpoint for the alarms is entered in the units selected in the operator display block.

The Not Acknowledge bit (NAK) in the alarm status word is set whenever the alarm goes from a no- alarm to an ALARM condition. When the ALARM condition clears, the NAK bit will reset if the Self Clearing NAKS paramter is set to ON. If the Self Clearing NAKS parameter is set to OFF, then the NAK but must be reset via a HART command.

The Alarms Out of Service parameter determines if the out of service bit in the alarm status word is set.

A.6 SETPOINT TRACK AND HOLD BLOCK

Tracking Setpoint

Yes/No

Power-Up Setpoint

-999999 to 999999

PV

This function block is a setpoint track and hold block and its operating value can be changed from the pushbuttons of the XTC or from the CHANGE SP key of the MXC. This function block can be configured as tracking or non-tracking. If it is configured as tracking, the SP will track the PV when the controller is in manual. If it is configured as non-tracking the SP will remain at its hold value.

SP Track and Hold

SP Track and Hold

Output

On power-up, the operating value in the function block is initialized to the Power-Up value. The Power- Up value can only be changed by editing the parameter in this function block with the MXC or by storing a new value via the pushbuttons of the XTC.

A.7 A/M TRANSFER BLOCK

 

 

Power-Up Mode

Automatic/Manual PV

.................................................Automatic Mode Only

 

Power-Up Valve

-1.0 to 110%

The A/M transfer function block consists of 1 Single Pole/Double Throw switch. The switch is controlled with the pushbuttons of the XTC or from the A/M key of the MXC. When the block is in AUTO, the output is equal to the controller output. When the block

A/M Transfer

Output

M

A/M

September 1995

A-3

Page 161
Image 161
Siemens UM344-2 user manual Alarm Block, Setpoint Track and Hold Block, A/M Transfer Block

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.