Allen-Bradley ProcessLogix 1756-IA16, Reference Manual, Page: 14 / 120

Publication 1757-RM810A-EN-P - May 2002
1-6 Introduction to Control Builder Components
Functional block types
Table identifies the functional block types used to represent a group
of corresponding function blocks provided in Control Builder. These
block types are used as a way to simplify information retrieval for a
given function block, and do not necessarily correspond to an actual
Control Builder function.
Functional Blocks
Type Description
System/
Continuous Control/
Sequential Control Control Module (CM) is a Control Builder “container” that uses predefined continuous (discrete)
control function blocks to define a given process control strategy.
Sequential Control Module (SCM) is a Control Builder “container” that uses predefined sequential
control function blocks to define the sequential operation for a given process control strategy.
Auxiliary Includes block types for performing auxiliary control functions, such as: calculation, general
linearization and totalization.
Device Control Provides a multi-input/multi-output function that provides an interface to discrete devices such as
motors, pumps, solenoidValves, and motor-operatedValves.
Data Acquisition Provides signal conditioning for a process inputValue from another function block.
I/O Channel (IOC) Includes channel block types (analog input, analog output, digital input, digital output, pulse width
modulator) to represent I/O points that are device independent; each I/O channel type has a
standard interface with control function blocks.
This category also includes array channel blocks to support communications with the associated
Serial Interface Module and the connected Field Terminal Assembly (FTA) device. You assign an
array channel block to one of the SIM block’s 32 channels as well as designating which of the two
FTAs it is associated with. The array channel block types are flag, numeric, and text.
Logic Provides a set of Boolean, selection and comparison functions to be used as a basis for integrated
logic control.
Regulatory Control Includes block types for building internal control loops.
Sequential Control Module Includes block types for building a sequential control function.
Utility Includes block types for performing utility control functions, such as: status flag, numeric storage
and timer capabilities. Blocks have been added for message, data array, and parameter type
convert support.
ControlNet Interoperability
(Exchange) Blocks Includes block types for performing ControlNet Interoperability functions, such as: Flag, Numeric
and Text storage.
Pulse Input Channel/ Module Blocks Provides a standard interface to the Pulse Input Module, 1757-PIM.
PROFIBUS Interface Provides a standard interface to the PROFIBUS Interface Module, SST-PFBCLX.
Fieldbus Interface Provides a standard interface to the Fieldbus Interface Module, 1757-FIM.