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Quantum Backplane Expander Installation Tip

The 140XBE10000 Back-plane expander and Cable allows you to add a second back-plane to a local or remote drop.  The cable (P/N 140XCA71703/6/9, depending on length) can be 1, 2, or 3 meters long respectively.  The back-plane expander modules are identical,...

Going Green in the Controls World?

It may have unexpected, unintended, and dangerous consequences During the past several months, we at Delta have noticed a huge increase of tech support inquiries and field service calls regarding what would normally be simple discreet I/O problems. The issue has been...

No extra charge for reptile extraction!

LIZARDS CHECK IN… A client in a tropical region recently sent us a piece of equipment for repair. Like a box of Cracker Jacks, inside, we found a little surprise. This poor lizard either got trapped there and starved and dehydrated or he possibly was electrocuted. But...

Communications network troubleshooting:

Delta uses a systems approach When the remote well monitoring and communications system at a large pulp and paper mill failed after a summer thunderstorm, the plant’s maintenance personnel went into action. The typical troubleshooting procedures were performed. The...

Hands-on training for network certifications

A plant with many Modicon remote I/O and Modbus Plus networks had been interested in getting their systems certified by Delta Automation for some time. During a recent single line shutdown, they requested that Delta come on site and train their maintenance folks while...

Thoroughness in Repair reveals System issue

  A new understanding of dual cable J890 A recent discovery was made during the repair of a Modicon J890 dual cable remote I/O interface. The repair technician had been testing this unit which appeared to be a “No Trouble Found” device. The tech had subjected the unit...

A Recipe for Savings

If you have an application that requires a large amount of recipe data then more than likely you have an HMI to access it. When an HMI and PLC coexist in an application always store the recipe data in the HMI where memory is less expensive. A number of customers have...

Knowledge of Obsolete part aids client in need

Late one evening after Thanks-giving, a call came into Delta, and fortunately, I was still at the office. The caller had an urgent need for a 200 series Modicon analog output module. They had a part number, but it was outdated. In the early days of production, Modicon...

Early-morning response saves Power Plant

On a Monday morning just before 4:00 a.m., we received a call from a client requesting service for a power station in Virginia. The technician went into the shop, gathered the needed parts and tools, and arrived. The client had replaced a 484 controller from their own...

After hours? No problem!

Production break- downs happen anytime and  that’s exactly when DELTA Automation, Inc.is available. A call came in around 9:30 p.m. July 17, 2006 from a good client in the deep south. The client’s customer was a large automotive plant whose production line was down...

Celsius to Fahrenheit Conversion

The figure shows a conversion from Celsius to Fahrenheit done in PLC ladder logic. When using a Panelmate HMI to display the temperature for an operator, it is much easier to do the conversion in the Panelmate. i.e. ([30001]*9)/5 + 32 Unless the converted value is...

Power supply issues when upgrading older systems

When upgrading older PLC or control systems, typically just the related hardware is replaced, such as the processor, power supply, I/O structure, etc. Other items within the standard control cabinet are most often reused to save time and money. This also assists in...

Legacy Modicon PLC Class

Recently, Roy Caudle, Delta’s National Sales and Service Manager, held a customized Modicon PLC maintenance course specifically designed to meet the requirements of a large national manufacturer of paper products. The course covered all aspects of troubleshooting,...

Oil platform—dead in the water—calls on Delta

With the summer gasoline demand in full force, an offshore platform near Santa Barbara, CA. was down. They weren’t producing any product at all. The pressure was on to get back on-line. The platform was having issues with a 200 series analog card with three...

Conveyor Avoidance Algorithm

A Simple Pacing and Collision Avoidance Algorithm THE TASK – A cross conveyor (D) and three induction conveyors (A, B, and C).  The three induction conveyors receive a boxed product at differing rates.  The induction conveyors must release product onto the cross...

Panelmate 1000 Repairs Continue

The most common failures to the Panelmate 1000 product line that we here at Delta Automation, Inc. see is the power supply section of the unit.  The root cause comes from several sources.  Industrial plants have surges and spikes on their incoming power...

True High or True Low?

How many times over the years have you or your customers ordered a true high or true low card, only to get it and realize that the polarity is reversed from what you intended ? The terms true high and true low are usually used together as well as sink and source. ...

Delta Automation, Inc. to the Rescue

A Modicon customer in Salt Lake City, Utah had a failure of their E984-485 with no backup files of the program.  They did however have a spare controller. They searched and found Delta Automation’s web site and phone number.  They called and wanted to know...

Converting a 484 Sequencer During an Upgrade

When converting from a 484 Controller that uses a sequencer, (the 2XXX reference addresses), to a Quantum system it is necessary to build a sequencer in software.  The following network can be used as an example and modified to meet the number of steps your...

PLC Battery Replacement

Almost every PLC has a battery installed to backup the memory in the event of a power loss/failure. There has always been some confusion as to the function of this battery backup arrangement. The battery does NOT allow the PLC to continue performing it’s job. It...

Advantages of fiber optics for large networks

We all know the basic problems encountered with installing a Modicon remote I/O network.  They range from unbalanced systems to weak signals at the remote drops.  Factors adding to the communications problems such as noise from other electrical equipment, improper...

Analog Scaling of Inputs and Outputs

Scaling is necessary on analog input or output module values so calculations can be performed.  The scaled values are often referred to as engineering units.  Several terms are associated with scaling.  Raw value is the signal produced by or to the analog module.  Raw...

Modbus to Ethernet Bridge 174CEV30020

A solution for plant engineers that have their desktop computers on the company intranet and still have the need to query a Modbus Plus network PLC on the factory floor can do so without having to purchase a Modbus Plus card for their computer.  By using the Modbus to...

Why Delta Automation Engineers like the B200 conversion connector

When a customer decides to upgrade an older Modicon PLC system that utilizes 200 series I/O connected to the field devices and the window of opportunity is short; the B200 conversion connector offers several advantages as the solution.  One of the biggest risks...

2000 miles 58 hours 4 days. Whew!

9.28.06Skip Langley and George Myers headed out to certify a remote I/O system for a client in Georgia. The job was scheduled for 7 a.m. on Friday, Sept. 29 with plant power being shut- down at 12:00 p.m. that day. They arrived at 7 a.m. and started terminating their...

Items of Concern when Updating 484 Systems

Typical 484 System Components These items and others may influence what hardware options are selected for each application. Please consider Delta Automation, Inc. when providing an upgrade solution.

Delta Discovers Potential Disaster in Upgrade Proposal

Recently, a large paper products manufacturer contacted Delta Automation, Inc. to issue a quotation to install a product upgrade for an older Modicon system. This particular system was a 584 controller with one local channel of I/O and one remote channel of I/O. What...

Complete Service for Push Button Panels

Many customers have been plagued by the inability of many repair organizations to service and competently repair their Modicon Push Button Panels. This has been partially due to the lack of replacement parts and partially due to the lack of desire with some repair...

Items to be concerned with when Upgrading 884 Systems

The items pointed out here are just some of the important items to consider when contemplating an upgrade for an 884 system. Not all systems have this many options; however you must consider them if present.  More importantly, there are not always  direct replacements...

Redundancy System I/O Hold-up Time

The default setting for the remote I/O hold up time (HUT) on a Modicon PLC system, is 300 milliseconds. This determines the amount of time that the discrete outputs associated with a particular drop will remain in the “on” state once communication with the processor...

The Disadvantages of Automatic Firmware Upgrades

The definition of firmware is the chip or chips containing the code (software) to determine how the equipment will function. The manufacturer performs upgrades to the code for several reasons. Many times added functionality to a given product may require alterations...

Two 200 Series I/0 Channels Replaced in Record Time

The product distribution system for a large production facility was in need of upgrading a 584 redundancy system installed in the early 80’s. This system had been initially commissioned by Bob Culley, so Delta Automation Inc. was the logical choice for the company to...

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Delta Automation - The Leader in VFDs, PLCs, and Motors & Controls 

Located in Richmond Virginia, Delta Automation is an Industry Leader in Industrial Electronics Remanufacturing (depot type repair), On-Site Field Service, New Equipment Sales, and Mature Equipment Sales. Our focus is on Programmable Controllers (PLCs), Drives (VFDs), Control Screens (HMIs) and Peripheral Hardware Support (to include, Software & Firmware). With over 50 years of Repair and Support, we proudly offer our services.

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