Rockwell Automation 1794-Lxxxx PhaseManager - Manual (Page 115)

Publication LOGIX-UM001B-EN-P - April 2010 113
Glossary
This manual uses the following terms:
Term Definition Example
Unit A group of equipment that works together to produce the product or
interim product. The equipment of a unit operates independent
(relatively independent) from other equipment.
 brew kettle
 mixing tank
 bottle filling machine
 bottle capping machine
Equipment module A group of input devices, output devices, motors, drives, and soft
controls (PID loops, totalizers, and so forth.) that go together to perform a
specific activity (task, function) of a unit. The devices within an
equipment module:
 work as one entity.
 operate independent (relatively independent) from other
equipment.
 fill a tank with water
 mix the contents of a tank
 drain a tank
 fill bottles
 cap bottles
Equipment module
interface Collection of data values that you supply to an equipment module or get
from it to monitor and control it. An equipment module interface includes
on/off/start/stop commands, mode requests, set points, and fault/health
status. It acts as a faceplate for your logic to the equipment module.
 BOOL tag: Go_To_This_State
 BOOL tag: In_This_State
 BOOL tag: Go_To_This_Mode
 BOOL tag: In_This_Mode
Unit procedure The sequence of processing activities that a unit performs to produce the
product or interim product.
 A unit procedure directs the execution of phases.
 A unit procedure could be a hierarchy of SFCs that is subdivided
into specific operations. Each operation directs the execution of a
group of phases.
 A unit may have multiple unit procedures depending on how the
sequence changes for different products.
Brew
Phase A specific task that your equipment does. A phase directs the actions of
your equipment. It tells the equipment what to do and when to do it.
 Fill bottles with product.
 Put bottles in carton.
 Fill tank with water
 Mix ingredients in tank
State The condition of your equipment in relation to normal production. A
phase can have up to 11 different states, some of which are active and
other are waiting.
 Active (…ing) states represent the things your equipment does at
a given time (running, holding, restarting, stopping, aborting,
resetting). Each state contains a separate blocks of code (routine)
and can call other routines.
 Waiting states represent the condition of your equipment when it
is in-between active states (stopped, complete, idle, held,
aborted, stopped). Waiting states have no associated routines or
logic
A phase transitions from one state to another only in a specific order.
Your equipment can go from its current state to only certain other states.
 In the running state, fill the tank
with water.
 In the holding state, temporarily
stop filling the tank with water.
 In the resetting state, reset the
logic and clear the totals.
Charge
Boil
Drain