Advanced Microprocessor with Graphics Control Setup

4.11.3Read Digital Inputs

The four custom alarm inputs can be defined to be digital inputs. Digital inputs are used to sense cus- tomer devices for status display purposes only and will not activate the audible alarm.

4.11.4Set Up Digital Inputs

A digital input is enabled by defining one of the four custom alarms to be STATUS ONLY type in the alarm setup screen. The digital input is given a name by specifying it to be one of the optional alarms or a custom text alarm. See 4.4.3 - Setup Alarms and 4.4.4 - Set Up Custom Alarms.

4.12Main Menu (AG)—View Run Hours Log

Selecting VIEW RUN HOURS LOG will step to the following menu:

•VIEW 24 HOUR RUN TIME HISTORY

•VIEW TOTAL RUN HOURS

4.12.1View 24 Hour Run Time History

The history of each load for every hour during the past 24 hours is displayed in the run hour history. The percentage of each hour that the load was on is displayed from 0 to 100% in increments of 5% or 3 minutes. Loads with a variable output are displayed as a percentage of their capacity for an hour. For example, a variable load that is 50% on for 1/2 of the hour will be displayed as 25% on for that hour.

4.12.2View Total Run Hours

The total operating hours of all major components in the unit can be monitored from the display and are retained in nonvolatile memory. Run times are available for the following:

•COMPRESSOR 1

•COMPRESSOR 2

•GLYCOOL COIL (or DUAL COOL COIL)

•FAN

•HUMIDIFIER

•REHEAT 1 (or HOT WATER REHEAT)

•REHEAT 2

•REHEAT 3

•CHILLED WATER COIL

•HEAT REJECTION

The component run hours for each individual component can be reset by selecting the run hours dis- play screen for the desired component, then pressing ENTER within five (5) minutes of applying power to the control. The user will then be prompted to press ENTER to clear the selected compo- nent's run hours.

NOTE

A component’s run hours should BE RESET ONLY when the component has been replaced.

4.13Load Control Features

4.13.1Short Cycle Control

The control system monitors both compressors and prevents each from turning on within 3 minutes of being turned off. If this (on, off, on) occurs too often, ten (10) times in one hour, a Short Cycle alarm could occur.

4.13.2Sequential Load Activation Control

The control allows only one load output to be energized at a time on a restoration of power or micro- controller reset. Each additional load output will be activated at one second intervals until desired operating conditions have been met.

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Emerson VE, VH Main Menu AG-View Run Hours Log, Read Digital Inputs, Set Up Digital Inputs, View 24 Hour Run Time History
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VE, DH, VH, DE specifications

Emerson is a well-known brand in the field of automation solutions, offering a range of products that cater to various industries. Among its diverse portfolio, Emerson’s products like DE (Digital Electronics), VH (Variable Frequency Drives), DH (Distributed Control Systems), and VE (Valve Positioners) stand out for their advanced features, cutting-edge technologies, and unique characteristics.

Digital Electronics (DE) from Emerson represents the backbone of modern automation systems. These devices are characterized by their highly reliable digital communication capabilities, providing robust solutions for process monitoring and control. DE products integrate seamlessly with various automation platforms, allowing for easy data exchange and system interoperability. The advanced analytics embedded in these systems enable predictive maintenance strategies, enhancing overall operational efficiency.

Variable Frequency Drives (VH) are integral to motor control technologies, maximizing energy efficiency in various applications. Emerson's VH drives are designed for flexibility, supporting multiple motor types and configurations. These drives utilize pulse width modulation (PWM) technology, allowing for precise speed control and improved application performance. Their built-in protection features help extend motor life, prevent downtime, and reduce maintenance costs. Furthermore, the user-friendly interfaces of VH drives facilitate quick setup and troubleshooting.

Distributed Control Systems (DH) from Emerson provide a holistic approach to managing complex industrial processes. They enable centralized control while ensuring that local operations continue seamlessly. DH systems are characterized by their modular architecture, making them highly scalable and adaptable to changing operational needs. Advanced control algorithms within these systems help optimize processes, ensuring maximum productivity. Additionally, their enhanced cybersecurity features protect critical industrial operations from potential threats.

Emerson's Valve Positioners (VE) play a crucial role in regulating flow and pressure in various processes. These devices provide precise positioning capabilities, enhancing the performance of control valves. The VE systems incorporate smart technologies such as adaptive control and diagnostics, allowing them to self-tune and deliver accurate performance over time. Their compact design and robust build ensure they operate effectively in challenging environments.

In summary, Emerson's DE, VH, DH, and VE offerings embody the latest innovations in automation technology. Their main features, including digital communication, energy efficiency, scalability, and precision control, cater to the diverse demands of modern industries. With these products, Emerson not only enhances operational efficiency but also paves the way for intelligent automation solutions that are crucial for the future of industrial processes.
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