PLC / HMI Programming California

Programmable Logic Controller (PLC) Program Development & System Design

• PLC programming service for various PLC vendors including Allen-Bradley ( A-B ), Modicon, Seimens.
• HMI screen development.
• Documented ladder logic and HMI programs.
• Modular programming methods use to help make fault finding easy.
• PID control programming.
• Industrial network communication design and implementation such as Ethernet, ControlNet, DeviceNet, DH+, Modbus Plus.

Unified Theory, Inc. 1320 Flynn Road, Suite 201, Camarillo, CA 93012

Ph: 805-389-7420 Fax: 805-389-7418  www.utieng.com        

 

VOC emission control using an Thermal

Regenerative Thermal Oxidizers – RTOs are used to capture and eliminate VOCs from an air stream.


Thermal treatment of VOC's and other air pollutants works by a simple reaction of the harmful air pollutants with oxygen and heat. In this environment the VOC's are converted to CO2, water vapor (H2O), and usable heat. These harmless by-products are released to atmosphere or use an energy recovery technique to further lower the operational costs.

UTI and its personnel have years of VOC's experience and have developed, through years of experience, process strategies and system configurations:

• Solvent Handling, including VOCs Emission Reductions and Recovery
• Odor Control through various technologies: Scrubbers, Carbon Adsorption, Bio Technology and Thermal Oxidation
• Thermal Oxidation Systems ranging in size from 2,000 cfm to 250,000 cfm
• Solvent Recovery Systems ranging in size from 5,000 cfm to 25,000 cfm
• Bio Technologies up to 30,000 cfm
• Incident Investigation of Failed Systems
• Improved VOC Capture Efficiency for Process Systems
• Provided the Design and Specification for VOC's Emission Reduction Equipment and Systems
• Developed Standard CAD Details for VOC's Emission Reduction Systems
• Redesigned Stack and Source Dampers in Conjunction with VOC's Emissions Reduction Equipment to Improve Process Optimization, Comply with MACT Standards and Reduce Energy Costs
• Optimized Thermal Oxidation Systems
• Specified Solvent Recovery Coil Replacements
• Provided Financial Analysis for VOC's Emission Reduction Systems to Provide the Most Cost Effective System for given Applications
• Provided Incident Investigation for Misapplied VOC's Emission Reduction Systems and Equipment Failures
• Provided Expert Witness for Failed VOC's Emission Reduction Systems
• Provided Solvent Extraction Systems Engineering Design
• Designed Solvent Handling, Storage and Unloading Facilities
• Designed Inline Moisture Process Control Systems
• Developed Pulp & Paper Plant P&ID Drawings for Hazardous Systems
• Created Process Flow Drawings & Mass Balance Tables
• Designed Tether (Life Line) Certification
• Provided Calendaring Roll Design and Consultation
• Design Overhead Material Handling Systems and Hoist Certification
• Engineered Polyester Fiber Handling System
• Created Trim/Weed Conveying System
• Provided Ammonia Engine Room Redesign and Certification
• Designed Sewer System Design
• Construction Management for Chemical Plants, Food Plants and Greenfield Facilities
• Designed Furnace Gas Train Evaluation and Design
• Provided Gas Train Design and Specifications
• Designed and Developed Laminator and Sputter Platform Equipment
• Provided Engineering for an Automotive Plant Expansion

Basic PLC system concept

A PLC system comprises of Input and Output modules that allow information to be monitored and to be controlled.

Typical Input and Output modules for any PLC control system are:

• Digital Inputs
• Digital Outputs
• Analog Inputs
• Analog Outputs

 

There are also many specialty modules available for the more expensive systems such as:

• High speed input modules
• HART interface modules
• Hydraulic control modules
• Controlnet Interface modules
• Devicenet Interface modules

 

Unified Theory, Inc. 1320 Flynn Road, Suite 201, Camarillo, CA 93012

Ph: 805-389-7420 Fax: 805-389-7418

E-Mail: thowsham@utieng.com Web: www.utieng.com        

 

Using a Programmable Logic Controller (PLC) to make your machine design go smoothly

Nothing takes the fun out of machine design more than thinking about how to control it in real time. Even small machine control applications require a lot of specifying, purchasing, and design.

Enter the PLC - Programmable Logic Controller. The concept of a PLC system is to help replace as many relays and wiring as possible in a control system. By doing this, the control of the system becomes more flexible. It is more practical to use a PLC based control system for any automation system as it will allow designers and end users alike, more control over the final operation of any machine. Real world examples of this are:

 

• Adding time delays on to Inputs from Limit switches and Proximity switches
• The ability to “filter” an analog process value. This ability has the effect of smoothing out the peaks and troughs of an analog signal so that machine control can be implemented without reacting to quick process value changes.
• Easy implementation of PID control loops. Most PLC’s have some form of PID control built in to them. It is quite an easy process to add or modify an PID control to PLC logic. PID control is used in applications such as, but not limited to: Robotics, temperature control, pressure control, speed control, air flow control, humidity control, feed rate control and position control.
• Easy access to live data within the automation system. These days, everyone from the operators on the factory floor to the CEO of the company wants information about machine operation in some form. PLC systems can help immensely in this arena. A majority of PLC controllers these days can be accessed via some form of network communication system. The most common form of this is Ethernet communications. Ethernet gives the ability to allow a local screen to show an operator some machine information that they need (E-Stop status, Door status, position status, Temperatures, Pressures, Run time, etc.)

 

Unified Theory, Inc. 1320 Flynn Road, Suite 201, Camarillo, CA 93012

Ph: 805-389-7420 Fax: 805-389-7418

E-Mail: thowsham@utieng.com Web: www.utieng.com