Operator Panels The Micromaster 420 and 440 series models are supplied with a Status Display Panel (SDP). When a higher level of control, information feedback or the ability to change parameters is required, an operator panel must be used. There are 2 options: Basic Operator Panel (BOP) or Advanced Operator Panel (AOP). Basic Operator Panel (BOP) With this panel the user can change the default settings for a particular application. Using the BOP it is possible to access to levels 1 to 3 of the parameter set. Factors which can be modified include: Speed Frequency Direction of motor rotation Jog Advanced Operator Panel (AOP) Additional feature over BOP: Communication via RS-232 interface Expanded language facility Diagnostic menu & fault finding assistance Values displayed e.g. speed, frequency Capacity to store & download up to 10 parameters sets Digital & Analogue inputs Serial link via USS Protocol Automated system via Profibus connection Siemens Micromaster 420//440 Range The 400 series family is the next step in the evolution of the Micromaster inverter range. It builds on the success of the previous versions, which made it a global favourite for motor control.