Callidus Design has extensive experience of the successful design, specification and installation of Building Management Systems (BMS), Building Energy Management Systems (BEMS) and Process Control Systems including SCADA (Supervisory Control and Data Acquisition) for PLCs. Applications include those which provide environmental control, process control and central plant control.
Controls strategies play a vital role in maximising the efficiency of all mechanical systems. It is the application of more and more comprehensive controls packages which have led to some of the most significant advances in efficiency which we have witnessed it the past decade. Of course, control of plant or indeed energy cannot be achieved without first measuring and monitoring. It is the installation of a myriad of sensors and sensing technologies which provide the controls systems with their 'eyes' and 'ears'. Only by monitoring energy consumption is it reasonable to expect to be able to reduce it.
Fault Monitoring, Investigation & Resolution
As well as the controls functionality itself, a BMS or BEMS provides a further critical function in the operation of complex processes, namely Alarm Handling. On a large site with a high I/O count, keeping track of the operational condition of the plant can be a substantial task. Once the process limits are programmed, the resulting alarms can be by marshalled and filtered by priority to enable the operator to distinguish those that need the most urgent attention. Logging of alarms and coincident operational conditions allows a high degree of fault finding and troubleshooting to be carried out from the Front End or Graphical Interface. This can save a significant amount of time on site as the maintenance team can be directed with more accuracy to the cause of the failure.
State of the art production facilities increasingly rely on close control of critical environments to provide ideal conditions under which their manufacturing process can be carried out.. These include close temperature control as well as close humidity control environments (control range: <5%RH and >98% RH can be achieved where necessary). Temperature control of large spaces to within +/- 1DegC is now commonplace for close tolerance manufacturing processes.
As the sophistication of controls systems have increased ,so has their interoperability with complementary technologies. Control systems can now be integrated with preventative maintenance systems to improve the accuracy of maintenance targeting and thus reduce maintenance costs. Condition monitoring of plant components allows parts replacement on a qualitative basis rather than on breakdown or by timed forecasting.