ABB ControlMaster Series Manual page 38

ControlMaster CM15
Universal process indicator,
Problem solving flexibility
Extensive functionality is available to provide flexible problem-
solving capability; making the CM15 much more than just a
process indicator.
Process alarms
8 independent process alarms can monitor any analog signal
within the CM15, enabling extensive process monitoring
capability. Alarms can be used to drive physical outputs or
soft-wired to other functions within the indicator.
Real-time alarms
The 'alarm clock' functionality provided by the CM15's real-
time alarms enables time-of-day decisions to be introduced
into the indicator's actions or specific functions to be triggered
routinely at specified times.
Delay timers
Event sequencing is enabled through the use of the CM15'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 CM15 has 2 independent 20-point custom linearizers that
can be applied to any analog signal within the indicator. 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.
6 DS/CM15–EN Rev. J | ControlMaster CM15 | Universal process indicator,
/ DIN
1
8
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 'multiplexing' 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 indicator to maximize
flexibility.
Totalizer
2 totalizers are available on the CM15. 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
Frequency input
For maximum accuracy the CM15 can accept a frequency
signal from an electromagnetic flow meter. The frequency
signal can be totalized and displayed; an instantaneous flow
rate can also be calculated and displayed on screen.
1 / DIN
8