Technologies / Control systems
NIS have a vast array of control system experience gained throughout our diverse market sectors. As system integrators we are adept at matching existing systems to new, state of the art control systems. We offer a full in-house service from concept design to panel build, including simulation, works testing, installation and commissioning.
Technologies applied on previous projects have included:
Programmable Logic Controller (PLC)
Over the last 20 years PLCs have replaced the discrete panel components and relay logic of older systems. This has allowed panels to be compact, the wiring time/cost to be reduced, processing speed to increase and changes to control systems became easier to implement. PLCs can now handle a wide range including analogue, thermocouple, RTD, encoders etc.
Distributed input/output (I/O)
Further developments in PLC systems have put the I/O closer to the device. The advantage is that it is possible to observe status indications from a local position, and it is now possible to connect a laptop virtually anywhere within the system (even wirelessly) and monitor or interrogate the controls.
Human-machine interface (HMI) / Supervisory Control And Data Acquisition (SCADA)
NIS can integrate full colour touch screen HMIs that allow graphical representation of the plant, operator prompts, and diagnostic information including trending, recipes, history, etc. It is also possible to use the HMI locally for changes to process or for maintenance purposes. For larger systems a PC based system that allows SCADA to be used is available which can communicate with factory management, allowing processes to be monitored and changed remotely (e.g. manager’s office).
Vision systems are normally used for inspection purposes. This takes out the requirement for an operator, and lends itself to automated processes. In other applications a vision system can be used to determine whether a product is orientated correctly to allow a process to continue, which can then trigger manipulation systems to make adjustments.