The material to be packed was within an explosive atmosphere within a kiln.

The product was being discharged at a temperature of well over 100 deg C into steel drums, each containing approximately 350 kg. The drums were on a weigh platform which gave us a signal when target weight was reached, and printed a label to attach to the drum.

This was a little project to be used for the testing of the annodising of small parts used in the aviation industry. The system was to heat a water bath to 96 degrees C, and maintain that temperature (+/- 2 degrees) throughout the 45 minute test period

The system was to recycle material which was previously only used once, then disposed of.

The "used material" was vacuum conveyed into a small silo. It was then passed through a sifter with two separate meshes to separate out the particles which were either too large, or too small. This then left the material which was suitable for reusing.

After sieving, the material was blown into a flexible storage silo ready for use.

This system took pelletised material direct from the pelletiser, and conveyed it to a pair of storage silos. It had previously only fed a bagging station. The result was that considerably longer runs were possible without the need for labour to monitor the situation all the time. Material from the silos was then fed back to a new bagging station at a much higher rate. Consequently, the whole process became less labour-intensive.

This system was to control a Land Based Blower, discharging a road tanker of sugar into a silo. Although a road tanker has it's own on-board blower, it is considerably noisier than a land-based blower. At this site there were houses in close proximity to the factory, so noise was a major issue.

The plant is used for coating items with a thin film; typically putting the silver reflective surface on the inside of car indicators.

The items to be coated are placed within the vessel, and the vessel sealed. Air is extracted to make the vessel a complete vacuum. Once evacuated a heater element melts the coating medium which is then scattered across the chamber and any components within it. Air is then re-introduced into the vessel before allowing the door to be opened and the coated products removed.

This system involved the design of a standard control panel to control a tanker loading spout. The panel had to cater for a number of options which may or may not be present on each spout. PJC Systems designed the control system, specified the components, oversaw the panel manufacture and the wiring of the prototype spout, and proved the correct functionality.

This is a system that PJC Systems originally installed in 1996 to blow material from a compounding machine to a number of bins and silos. Recently, several more bins were added to the system. The practicalities of replacing the mimic diagram to one of the same size, but incorporating additional bins was considered impractical. PJC Systems replaced the mimic diagram with an hmi, which easilly fitted within the existing panel. By removing some of the plc driven lamps, and by incorporating the operator controls which were previously on the front of the panel onto the hmi, PJC Systems managed to free-up sufficient inputs and outputs for the modifications.

PJC Systems also carried out modifications to the mixing plant control and SCADA systems to incorporate the new bank of silos.

This system controlled the tanker filling of three storage silos, and the transfer from these three silos, plus a number of big bag discharge stations, to nine plastic extrusion lines. The supply of material to the extruders is critical, to maintain continuous production.

PJC Systems designed, built, and commissioned the system on site

PJC Systems designed and built the panel, and factory tested the system at our customer's works.

This system injected Lime into the flu containing gasses from a process plant. The lime was used to neutralise the harmful substances from the processes. PJC Systems designed, built, and commissioned the system, which took signals and setpoints from the end user's SCADA system, and, interfacing with another supplier's feeder, blew the correct amount of lime into the system to neutralise the output gasses.

This system consisted of the unloading of tankers into two flour silos, the transfer of flour to four dispensing stations, and the loading of a mixing bowl via loss-in-weight discharge. PJC Systems designed, built, and commissioned the system which comprised a main control panel incorporating a Mitsubishi Q series plc, ethernet communications to four operator station E300 hmis, inverters, and a number of current monitoring devices. Additionally, PJC Systems supplied a tanker fill panel showing both silo weights and the condition of silo equipment.

Tankers were previously loaded via loading spouts directly under each of the bank of eight silos. The system was initially changed so that two of the silos discharged via screw conveyors to a shared loading spout. PJC Systems designed, built, and commissioned the system which controlled the silo discharge, and interfaced with the loading spout. Since then, the other six silos have been modified in the same way, and PJC Systems have built and commissioned the control panels.

This was a high vacuum application used to increase the efficiency of a filtration process. PJC Systems designed and built the control panel, wrote the application software, and proved the functionality of the system at our customer's workshop.

At each side of the lift was a row of LED light arrays. The project was to make a bank of three light arrays, on each side, follow the lift up and down. The panel build and site installation was by another company, but PJC Systems were approached to write the plc software. An encoder was fitted to the lift drive mechanism, and signals were picked up from the lift control system. The plc used was a Mitsubishi FX1S, which PJC Systems programmed to incorporate a "set-up" mode, and a "test" mode.

Alongside these modifications, PJC Systems also installed an hmi panel, and brought on stream a section of plant which had not previously been commissioned.

The mechanical equipment was being re-installed in a slightly different configuration, and with additional conveyors and sensors. PJC Systems changed the plc to a Mitsubishi FX1S, rewrote the plc software, and commissioned the system on site. PJC Systems spent time to evaluate the system, which had to be set up to allow the faster lines to have priority over the slower lines.

The control system for this PTU involved both electrical and pneumatic components. The panel we built separated the two diciplines to prevent contamination of the electrical content by the exhausted lubricated air from the pneumatic content.

PJC Systems designed and built the panel, and proved the correct functionality when connected to the PTU at our customer's workshop.