Symptom High Output | Siemens UM344-2 manual

UM344-2CALIBRATION AND MAINTENANCE

TABLE 6.5 Symptom - Zero or Low Output, Continued


Loop Wiring/Power Supply	Check for 12 Vdc minimum across SIGNAL +/- terminals in transmitter terminal
	compartment.
	Check power supply output voltage for specified level: 17 Vdc minimum, 42
	Vdc maximum.
	Check power supply for blown fuse or tripped circuit breaker.
	Check polarity of loop wiring.
	Check that loop resistance is between 250Ω and 1100Ω.
	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 of loop cable and for electrical interference between
	the loop cable and any adjacent cables in a cable tray or conduit.
Transmitter stuck in Loop Override	Re-enter Loop Override from MXC Main Menu and properly exit Loop
Mode.	Override Mode.

	TABLE 6.6 Symptom - High Output

POSSIBLE CAUSE		CORRECTIVE ACTION

Transmitter Electronics Failure		Establish communications between the MXC and transmitter, then check the
		STATUS of the transmitter. If a FAILSAFE message is posted, refer to Section
		6.3.2.1, paragraph A, for troubleshooting procedures.
		If transmitter STATUS checks OK, EXIT the Status screen to the On -Line
		Menu and select LOOP OVRD (loop override). Verify the loop by setting the
		output current to 4, 12 and 20 mA (read at Digital Meter or ammeter connected
		to TEST +/- terminals.
		If selected loop currents are significantly out of tolerance as measured by the
		Ammeter, or loop current cannot be set, replace the Electronics Module. See
		Section 6.5.2. If transmitter passes loop override test, continue
		troubleshooting.

September 1995

6-23

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 Symptom High Output

Models: UM344-2

TABLE 6.5 Symptom - Zero or Low Output, Continued

TABLE 6.6 Symptom - High Output

POSSIBLE CAUSE

UM344-2 specifications