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Rockwell Automation Publication 1756-UM010C-EN-P - June 2021
Glossary
Minor revision
A module revision that is updated any time there is a change to the module that
does not affect its function or software user interface (e.g. bug fix)
Multicast
Data transmissions which reach a specific group of one or more destinations
Network update time (NUT)
The smallest repetitive time interval in which the data can be sent on a
ControlNet® network. The NUT can be configured over the range from 2 ms to
100 ms using RSNetWorx software
Nonresettable Totalizer Mode
Operational mode in which 1756-CFM module counts pulses from a Flowmeter
and scales them into volume (engineering units). In this mode, though, the
count total cannot be reset during normal module operation.
Owner controller
The controller that creates and stores the primary configuration and
communication connection to a module
Producer/consumer
Intelligent data exchange system devices in which the CFM module produces
data without having been polled first
Program mode
In this mode, the controller program is not executing.
Inputs are actively producing data.
Outputs go to their configured program mode state
Prover
Device used for the calibration of liquid meters in custody transfer
applications. Calibration compares a metered throughput to a known volume
in the prover.
Remote connection
An I/O connection where the controller establishes an individual connection
with I/O modules in a remote chassis
Removable terminal block (RTB)
Field wiring connector for I/O modules
Removal and insertion under power
(RIUP)
ControlLogix feature that allows a user to install or remove a module or RTB
while power is applied
Requested packet interval (RPI)
A configurable parameter which defines when the module will multicast data
Run mode
In this mode, the controller program is executing Inputs are actively
producing data. Outputs are actively controlled
Service
A system feature that is performed on user demand
System side
Backplane side of the interface to the I/O module
Tag
A named area of the controller’s memory where data is stored like a variable
Totalizer Mode
Operational mode in which CFM module counts pulses from a Flowmeter and
scales them into volume (engineering units).
Trickle
Operational mode in which the CFM module controls two lines in a filling
application, a full flow and a trickle flow. The trickle flow line provides users
greater accuracy by slowly finishing thefill process.
