PD Controller

UM344-2

APPENDIX A - FUNCTION BLOCK DESCRIPTIONS

Block Diagram, PID Controller

TDs

TDDG s + 1

+ / -

TI s + 1

Output

X02879S0

PD Controller
Controller	On/Off
Controller Type	PID/PD/ID
Action	Reverse/Direct
Proportional Gain (PID & PD)	0.01 to 100.0
Time-Integral	0.01 to 1000 min/repeat
Time-Derivative	0.01 to 100.0 min
Derivative Gain	1.00 to 30.00
Manual Reset (PD only)	0.0 to 100.0%
Manual Reset Tracking (PD only)	No/Yes

PD Controller

PID

Output

The PD controller is a proportional only controller with manual reset which can be selected as tracking or non-tracking.

The track function block will force the controller output to track the feedback, and if manual reset tracking is selected, the manual reset (MR) will also track the feedback when the controller is in manual. In either case, the controller will always go back to AUTO with the output equal to the feedback. The reset value will then return to the value of MR with the time constant established by the integral time (TI). Since the default value of TI is 100 min., it should be reduced (e.g. 0.01 min) when using this controller type. The TI Time Constant is selected for the rate at which the controller should return to normal operation after switching from manual to auto. Bear in mind that the TI time in the PD Controller is not an integral time and does not affect control stability.

If the derivative time TD is set equal to 0.0, the derivative section is eliminated.

September 1995

A-5

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.

Siemens UM344-2 user manual PD Controller

Models: UM344-2

PID/PD/ID

UM344-2 specifications