ABB ControlMaster Series Manual page 16

ControlMaster CM30
Universal process controller,
Problem solving flexibility
Extensive functionality is available to provide flexible problem-
solving capability; making the CM30 much more than just a
process controller.
Process alarms
8 independent process alarms can monitor any analog signal
within the CM30, enabling extensive process monitoring
capability. Alarms can be used to drive physical outputs or
soft-wired to other functions within the controller.
Real-time alarms
The 'alarm clock' functionality provided by the CM30's real-
time alarms enables time-of-day decisions to be introduced
into the controller's actions or specific functions to be
triggered routinely at specified times.
Delay timers
Event sequencing is enabled through the use of the CM30's
delay timers. A predetermined delay and output duration can
be programmed into each delay timer and timers can be linked
together.
Custom linearizers
The CM30 has 2 independent 20-point custom linearizers that
can be applied to any analog signal within the controller. These
linearizers can be used in applications such as level-to-volume
conversion of a non-linear tank level or to accommodate
special input signals or output devices.
8 DS/CM30–EN Rev. L | ControlMaster CM30 | Universal process controller,
/ DIN
1
4
Math
8 math blocks provide arithmetic, averaging, min. / max. hold,
square root and signal switching functionality. Simple
equations can be performed in a single math block or multiple
math blocks can be nested together to construct complex
equations.
Signal switching 'multiplexer' math blocks switch between 2
analog signals based on a trigger signal. For example, a
backup sensor could be selected automatically on failure of a
primary sensor.
Logic
8 comprehensive logic equations provide powerful interlock
functionality. Inputs and outputs of the logic equations can be
soft-wired to any digital signal within the controller to maximize
flexibility.
Totalizer
2 totalizers are available on the CM30. The totalizers can
configured to perform multiple functions:
— integration against an analog signal to totalize flow
— counting digital pulses
— totalization of flow based on a frequency signal from an
electromagnetic flow meter
1 / DIN
4