Access to the control system is typically through a graphical computer interface Supervisory Control And Data Acquisition (SCADA) interface, such as Visual Tag System (VTS TM) operator interface, running on a dedicated PC computer. This enables process adjustments and logging data/trends of levels and alarms. Operator adjustable process variables are accessible through the computer interface. The interface also enables access to logged information on float switch positions, tank levels, alarms, hour meters readings, pump and blower running status, etc. The levels in the reactors are monitored by pressure transducers mounted in each reactor tank. The VTS provides accurate metering of the flow through the plant eliminating the need for a plant flow meter.
The control system can be accessed from virtually anywhere in the world using a computer,
software, modem link and telephone access. By this method the operator and support personnel
can remotely check plant status and operational trends. This is particularly useful for alarm "call
outs" so the operator can check the priority of the call and determine before leaving home (or a
remote office) the type of response required. Also if the operator is away for a period of time, the
operator can check the plant status by a modem link from anywhere in the world. The data
acquisition is particularly useful for trouble shooting the plant. The system will incorporate a
dialer for alarms.
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