Rockwell Automation Standby Motor Group Reference Manua
Reference Manual
Rockwell Automation Library of Process Objects: Lead/Lag/Standby Motor Group (P_LLS)
Version 3.5
IMPORTANT
This manual applies to the Rockwell Automation Library of Process Objects version 3.5 or earlier.
For Rockwell Automation Library of Process Objects version 5.0, see
• PROCES-RM200
For Rockwell Automation Library of Process Objects version 4.0 or later, use the following manuals:
• PROCES-RM013 contains logic instructions
• PROCES-RM014 contains display elements
Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the
use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property
damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.
IMPORTANT
Identifies information that is critical for successful application and understanding of the product.
Labels may also be on or inside the equipment to provide specific precautions.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).
Allen-Bradley, Rockwell Software, and Rockwell Automation are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
Table of Contents
Preface Software Compatibility and Content Revisions . . . . . . . . . . . . . . . . . . . 5
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Lead/Lag/Standby Motor Group
(P_LLS)
Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Required Files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Controller File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Visualization Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Controller Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Lead/Lag/Standby Motor Group InOut Structure . . . . . . . . . . . 13
Lead/Lag/Standby Motor Group Output Structure . . . . . . . . . . 21
Lead/Lag/Standby Motor Group Local Configuration Tags. . . 24
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Execution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Motor Sort Algorithm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Display Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
State Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Status/Quality Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Mode Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Alarm Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Maintenance Bypass Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Using Global Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Quick Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Operator Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Maintenance Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Engineering Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Diagnostics Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Alarms Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Lead/Lag/Standby Motor Group Faceplate Help. . . . . . . . . . . . . 54
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 3
Table of Contents
Notes:
4 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Preface
Software Compatibility and Content Revisions
Additional Resources
For the latest compatible software information and to download the Rockwell
Automation Library, see the Product Compatibility and Download Center at
http://www.rockwellautomation.com/rockwellautomation/support/pcdc.page.
Table 1 - Summary of Changes
Topic Page
Visualization Files: Global Objects (.ggfx) - Process Diagnostic Objects 11
Array Member Content - Navigation Tag 14
For the latest compatible software information and to download the Rockwell
Automation® Library, see the Product Compatibility and Download Center at
http://www.rockwellautomation.com/rockwellautomation/support/pcdc.page.
For general library considerations, see Rockwell Automation Library of Process
Objects, publication
PROCES-RM002.
These documents contain additional information concerning related products
from Rockwell Automation.
Resource Description
PlantPAx® Distributed Control System Selection Guide,
publication
PlantPAx Distributed Control System Reference Manual,
publication
Rockwell Automation Library of Process Objects Reference
Manual, publication
FactoryTalk® View Machine Edition User’s Guide,
publication
FactoryTalk View Site Edition User’s Guide,
publication
Logix5000™ Controllers Add-On Instructions
Programming Manual, publication
Rockwell Automation Library of Process Objects: Common
Alarm Block (P_Alarm) Reference Manual,
publication
Rockwell Automation Library of Process Objects:
Interlocks with First Out and Bypass (P_Intlk) Reference
Manual, publication
Rockwell Automation Library of Process Objects: Common
Mode Block (P_Mode) Reference Manual,
publication
Rockwell Automation Library of Process Objects:
Permissives with Bypass (P_Perm) Reference Manual,
publication
PROCES-SG001
PROCES-RM001
PROCES-RM002
VIEWME-UM004
VIEWSE-UM006
1756-PM010
SYSLIB-RM002
SYSLIB-RM004
SYSLIB-RM005
SYSLIB-RM007
Provides information to assist with equipment
procurement for your PlantPAx system.
Provides characterized recommendations for
implementing your PlantPAx system.
Provides general considerations for the PlantPAx system
library of process objects.
Provides details on how to use this software package for
creating an automation application.
Provides details on how to use this software package for
developing and running human-machine interface (HMI)
applications that can involve multiple users and servers,
distributed over a network.
Provides information for designing, configuring, and
programming Add-On Instructions.
Details how to monitor an input condition to raise an
alarm. Information includes acknowledging, resetting,
inhibiting, and disabling an alarm. Generally the P_Alarm
faceplate is accessible from the Alarms tab.
Explains how to collect (sum up) the interlock conditions
that stop or de-energize a running or energized piece of
equipment or prevent it from starting or being energized.
Explains how to choose the Mode (owner) of an
instruction or control strategy. The Mode instruction is
usually embedded within other instructions to extend
their functionality. It is possible to use a standalone Mode
instruction to enhance a program where modes are
wanted.
Details how to collect permissive conditions to start a
piece of equipment.
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 5
Preface
You can view or download publications at
http:/www.rockwellautomation.com/literature/. To order paper copies of
technical documentation, contact your local Allen-Bradley distributor or
Rockwell Automation sales representative.
6 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Lead/Lag/Standby Motor Group (P_LLS)
The P_LLS (Lead Lag standby motor group) Add-On Instruction provides
control of a parallel group of motors. Such groups are commonly used for a group
of pumps that maintain pressure on a header despite wide changes in demand,
such as in municipal-scale or plant-scale water distribution.
The following global object and faceplate images are examples of the graphical
interface tools for this Add-On Instruction.
Guidelines
Global Objects
Add-On Instruction
Use this instruction to control a group of motors, such as a set of pumps with
common intake source and discharge destination. The number of motors to run
depends on the demand on the system. The P_LLS group can be configured to
consist of as few as 2 or as many as 30 motors. The minimum demand can be set
as low as 0, so that all motors are stopped at minimum demand. The maximum
demand can be set as high as the number of pumps in the group. (In this case, if
the demand were as high as the number of pumps in the group, there would be no
'standby' pumps.)
Faceplate
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 7
Lead/Lag/Standby Motor Group (P_LLS)
IMPORTANT
To automate the group of motors, logic outside the P_LLS Add-On Instruction
must determine the demand and the number of motors in the group to run.
Every Lead / Lag / Standby control strategy consists of two basic parts: the logic
that determines number of motors to run (the demand), and the logic that
determines which motors to run. The P_LLS instruction provides the second
part of such a strategy. The logic that determines the demand varies from
application to application. The developer of each application must provide and
test this logic.
An operator or other logic determines the demand for motors. The P_LLS
instruction determines which motors to run to meet demand. In order for P_LLS
to start and stop motors in the group, they must be 'available'. A motor is available
when it has no faults and is in Program Mode.
The P_LLS instruction uses a sorting algorithm to deal with motors that are not
available. If a motor is running and not available (perhaps running in Operator
Mode), the motor is forced to the top of the sort. If a motor is stopped and not
available (perhaps faulted), the motor is forced to the bottom of the sort. The
motors that are available to start and stop are controlled to meet the demand. If
the demand cannot be met because of unavailable motors, a status/alarm
is provided.
EXAMPLE
Two motors in a group of four are stopped and not available. The P_LLS
instruction raises a 'can’t start' alarm when the demand reaches three because
there are only two motors available to run.
The P_LLS instruction uses an array of structures of the type 'P_LLS_Motor' to
interface to the motors. Each interface element in the array provides the signals
that are required between the P_LLS instruction and one motor. Configuration
data for the motor are also provided in the array. This data includes Priority and
Preference values that can be used to affect the sorting of the motors. A
Maintenance 'out of service' flag that removes a motor from consideration in the
sort is also included. The interface also includes a 'user sort' value that can be
used, for example, to push motors up or down the sort based on accumulated
runtime or other criteria.
8 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Lead/Lag/Standby Motor Group (P_LLS)
Functional Description
The P_LLS Instruction controls and monitors a group of 2 to 30 motors and
provides:
• Operator, Program, and Override capability to start and stop the group (as
a group).
• Ability for the Operator or Program to enter a 'demand', the number of
motors to run.
• Configurable maximum demand (1 to number of motors in group).
• Configurable minimum demand (0 to maximum demand).
• Configurable to stop the last started motor or the first started motor
(first-on-last-off or last-on-last-off).
• Configurable delay between starts and configurable delay between stops.
• Start and Stop commands on the P_LLS instruction allow for starting or
stopping the motors as a group. The delay between starts or stops can be
configured to sequence the motors.
• Starts or stops motors as required to meet the entered demand.
• Identifies (and optionally alarms) when there are not enough motors
available to start (in Program Mode and ready to run) for the given
demand to be met.
• Identifies (and optionally alarms) when there are not enough motors
available to stop (in Program Mode and ready to stop) for the given
demand to be met.
• Ability to rotate the list of motors (demote the lead, promote the others).
• Monitoring of Permissive conditions to allow starting the motor group.
• Monitoring of Interlock conditions to stop/prevent starting the
motor group.
• Alarm if interlock conditions cause the group to be stopped.
• Supports HMI 'breadcrumbs' for Alarm Inhibited, Bad Configuration,
Not Ready, and Maintenance Bypass Active.
• 'Available' status for use by automation logic to know whether motor group
can be controlled by other objects.
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 9
Lead/Lag/Standby Motor Group (P_LLS)
Required Files
Add-On Instructions are reusable code objects that contain encapsulated logic
that can streamline implementing your system. With this code, you can create
your own instruction set for programming logic as a supplement to the
instruction set provided natively in the ControlLogix® firmware. An Add-On
Instruction is defined once in each controller project, and can be instantiated
multiple times in your application code as needed.
Controller File
The P_LLS_3_5-00_AOI.L5X Add-On Instruction must be imported into the
controller project to be used in the controller configuration. The service release
number (boldfaced) can change as service revisions are created.
Visualization Files
This Add-On Instruction has associated visualization files that provide a
common user interface. These files can be downloaded from the Product
Compatibility and Download Center at
http://www.rockwellautomation.com/rockwellautomation/support/pcdc.page.
IMPORTANT
The visualization file dependencies require Process Library content imports to
occur in a specific order as reflected in the following tables:
• Images
• Global Objects
• Standard Displays
• HMI Tags
• Macros
Images are external graphic files that can be used in displays. They must be
imported for FactoryTalk View to make use of them.
When PNG files are imported, they are renamed by FactoryTalk View with
a .bmp file extension, but retain a .png format.
Table 2 - Visualization Files: Images (.png)
FactoryTalk View SE Software FactoryTalk View ME Software Description
All .png files in the images folder All .png files in the images folder These are the common icons used in the global objects and
standard displays for all Process Objects.
The Global Object files (.ggfx file type) in the following table are Process Library
display elements that are created once and referenced multiple times on multiple
displays in an application. When changes are made to a Global Object, all
instances in the application are automatically updated.
Table 3 - Visualization Files: Global Objects (.ggfx)
FactoryTalk View SE Software FactoryTalk View ME Software Description
(RA-BAS) Common Faceplate Objects (RA-BAS-ME) Common Faceplate Objects Global objects used on process object faceplates.
10 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Lead/Lag/Standby Motor Group (P_LLS)
Table 3 - Visualization Files: Global Objects (.ggfx)
FactoryTalk View SE Software FactoryTalk View ME Software Description
(RA-BAS) P_LLS Graphics Library (RA-BAS-ME) P_LLS Graphics Library P_LLS global object device symbols used to build
(RA-BAS) Process Alarm Objects (RA-BAS-ME) Process Alarm Objects Global objects used for managing alarms on process
(RA-BAS) Process Diagnostic Objects (RA-BAS-ME) Process Diagnostic Objects Diagnostic global objects used on process object
(RA-BAS) Process Faceplate Motor Objects (RA-BAS-ME) Process Faceplate Motor Objects Motor global objects used on process object faceplates.
(RA-BAS) Process Help Objects (RA-BAS-ME) Process Help Objects Global objects used for all process objects help displays.
(RA-BAS) Process Interlock Objects (RA-BAS-ME) Process Interlock Objects Global objects used for managing interlocks and
(RA-BAS) Process Mode Objects (RA-BAS-ME) Process Mode Objects Global objects used for managing modes on process
process graphics.
object faceplates.
faceplates.
permissives on process object faceplates.
object faceplates.
The Standard Display files (.gfx file type) in the following table are the Process
Library displays that you see at runtime.
Table 4 - Visualization Files: Standard Displays (.gfx)
FactoryTalk View SE Software FactoryTalk View ME Software Description
(RA-BAS) Common-AnalogEdit N/A Faceplate used for analog input data entry. The FactoryTalk
(RA-BAS) P_Alarm-Faceplate (RA-BAS-ME) P_Alarm-Faceplate The faceplate that is used for managing alarms for
(RA-BAS) P_Alarm-Help (RA-BAS-ME) P_Alarm-Help Alarm Help information that is accessed from the
(RA-BAS) P_LLS-Faceplate (RA-BAS-ME) P_LLS-Faceplate The faceplate that is used for the object
(RA-BAS) P_LLS-Quick (RA-BAS-ME) P_LLS-Quick The Quick display that is used for the object
(RA-BAS) P_Mode-Config (RA-BAS-ME) P_Mode-Config The Configuration Display used to configure the
(RA-BAS) Process Motor Family-Help (RA-BAS-ME) Process Motor Family-Help The Help display for Motor objects
(RA-BAS) P_Intlk-Faceplate (RA-BAS-ME) P_Intlk-Faceplate Optional
(RA-BAS) P_Perm-Faceplate (RA-BAS-ME) P_Perm-Faceplate Optional
(RA-BAS) Process Interlock Family-Help (RA-BAS-ME) Process Interlock Family-Help Optional
View ME faceplates use the native analog input data entry
so no file is required.
the object.
P_AIarm faceplate.
P_Mode object.
The interlock faceplate used for the object.
Use this file if your Discrete Output has an associated
P_Intlk object and you enable navigation to its faceplate
from the Discrete Output faceplate.
Permissive faceplate that is used for the object
Use this file if your object has an associated P_Perm object
and you enable navigation to the P_Perm faceplate from
the object faceplate.
Interlock/permissives help display that is used for
the object
Use this file if you use the P_Intlk or P_Perm faceplate.
HMI Tags are created in a FactoryTalk View ME application to support tab
switching on Process Library faceplates. The HMI tags may be imported via the
comma-separated values file (.csv file type) in the following table.
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 11
Lead/Lag/Standby Motor Group (P_LLS)
Table 5 - Visualization Files: HMI Tags (.csv)
FactoryTalk View SE Software FactoryTalk View ME Software Description
N/A FTVME_PlantPAxLib_Tags_3_5_xx.csv
where xx = the service release number.
These tags must be imported into the
FactoryTalk View ME project to support switching tabs on
any Process Object faceplate.
In a FactoryTalk View SE application, a macro is a series of commands stored in a
text file. In FactoryTalk View ME application, a macro is a list of tag assignments
stored in a text file. The following table lists the Macros (.mcr file type) used by
the Process Library.
Table 6 - Visualization Files: Macros (.mcr file)
FactoryTalk View SE Software FactoryTalk View ME Software Description
NavToP_LLS_Motor N/A This macro must be imported into the FactoryTalk View SE
project to support navigation to the Motor faceplate from
the P_LLS faceplate.
12 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Lead/Lag/Standby Motor Group (P_LLS)
Controller Code
This section describes the parameter references for this Add-On Instruction.
Lead/Lag/Standby Motor Group InOut Structure
InOut parameters are used to link the Add-On Instruction to external tags that
contain necessary data for the instruction to operate. These external tags must be
of the data type shown.
Table 7 - P_LLS Drive InOut Parameters
Tag Name Data Type Description
Ref_Motors P_LLS_Motor Motor Interface Array (link to 2 to 30 motors)
The number of motors is on Engineering Tab Page 2. The tag pointed to by
Ref_Motors is used to interface between P_LLS and 2…30 motors.
Engineering Tab Page 2 on page 48) sets the number of motors.
(See
In the following example, the interface tag is named 'MyP_LLS_Motors'. The
type is an array of P_LLS_Motor structures. For each group of motors, create an
interface array. Name its tag the same as the P_LLS instruction backing tag, plus
'_Motors'. The array must have at least as many elements as there are motors in
the group.
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 13
Lead/Lag/Standby Motor Group (P_LLS)
This tag is an array of parameter values that facilitates communications between
P_LLS and an instance of P_Motor. The following table shows the contents of
each member of the array.
Table 8 - Array Member Content
Name Data Type Description
Inp_OtherSel DINT Other motor selection criteria (0...255) (input to LLS).
Inp_Demote BOOL Demote this motor to bottom of list (for example, on high runtime) (input to LLS).
Cfg_Prio DINT Motor priority in list (0...31 -- if unused, set to 0).
Cfg_Pref DINT Motor preference in list (0...31), all else being equal.
Cfg_NavTag STRING_NavTag Logix tag to navigate to for this motor (For example, P_Motor backing tag name).
IMPORTANT: This tag does not work in FactoryTalk ME.
PCmd_Start BOOL Program Command to start motor (output from LLS).
PCmd_Stop BOOL Program Command to stop motor (output from LLS).
PCmd_Acq BOOL Command to Acquire motor in Program mode (output from LLS).
PCmd_Rel BOOL Command to Release motor from Program mode (output from LLS).
MSet_OoS BOOL Maintenance setting to place motor Out of Service (input to LLS).
Sts_Available BOOL Motor is in Program mode and ready to operate (input to LLS).
Sts_Stopped BOOL Motor is confirmed stopped (input to LLS).
Sts_Starting BOOL Motor is starting (input to LLS).
Sts_Running BOOL Motor is confirmed running (input to LLS).
Sts_Stopping BOOL Motor is stopping (input to LLS).
The following image shows the relationship between P_LLS, Ref_Motors
(interface), and P_Motor.
14 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Lead/Lag/Standby Motor Group (P_LLS)
The following images show an example of the ladder logic for transferring
commands and motor status for one motor. Three steps are shown:
• Get motor status into P_LLS.
• Execute P_LLS to select which motors to run.
• Forward commands to the motor from P_LLS to the individual motors.
Each of the three steps is shown on its own rung. If desired, all three steps can be
in one branched rung.
In the following diagram, the process for forwarding each of the commands
(PCmd_Acq, PCmd_Rel, PCmd_Start, and PCmd_Stop) is:
• The appropriate bit in the interface is tested to see if it set.
• If the bit is set, the bit is cleared and the corresponding program command
on the motor is set.
TIP
The interface for the first motor in the group is element [0] of the interface
array tag.
TIP
This logic assumes that the motor is configured to clear program commands
upon receipt (Cfg_PCmd_Clear = 1, the default value).
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 15
Lead/Lag/Standby Motor Group (P_LLS)
Next, the motor logic is executed.
The motor logic uses the program commands to control the physical motor. The
motor logic also receives feedback from the motor.
The status (available, stopped, starting, running, and stopping) is read from the
motor and written to the interface.
16 Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017
Table 9 - P_LLS Input Parameters
Lead/Lag/Standby Motor Group (P_LLS)
Lead/Lag/Standby Motor Group Input Structure
Input parameters include the following:
• Input data elements (Inp_) are typically used to connect field inputs from
I/O modules or signals from other objects.
• Configuration data elements (Cfg_) are used to set configurable
capabilities and features of the instruction.
• Commands (PCmd_, OCmd_, MCmd_) are used by program logic,
operators, and maintenance personnel to request instruction actions.
• Settings (PSet_, OSet_, MSet_) are used by program logic, operators, and
maintenance personnel to establish runtime setpoints, thresholds, and so
forth. A Setting (without a leading P, O, or M) establishes runtime settings
regardless of role or mode.
Input Parameter Data
Type
EnableIn BOOL 1 Enable Input - System Defined Parameter
Inp_PermOK BOOL 1 1 = Permissives OK, Group can start
Inp_NBPermOK BOOL 1 1 = Non-bypassable Permissives OK, Group can start
Inp_IntlkOK BOOL 1 1 = Interlocks OK, Group can start/run
Inp_NBIntlkOK BOOL 1 1 = Non-bypassable Interlocks OK, Group can start/run
Inp_Hand BOOL Mode.Inp_Hand 0 1 = Select Hand (hardwired) Control Strategy
Inp_Ovrd BOOL Mode.Inp_Ovrd 0 1 = Select Override control strategy
Inp_OvrdDemand DINT 0 Override Mode setting for number of motors to run (MinDemand..MaxDemand)
Inp_OvrdCmd DINT 0 Override Mode command:
Inp_Reset BOOL 0 1 = Reset all fault conditions and latched Alarms
Cfg_NumMotors DINT 3 Number of motors in this Lead / Lag / Standby Group (2…30)
Cfg_MaxDemand DINT 2 Maximum number of motors to run (1…NumMotors)
Cfg_MinDemand DINT 0 Minimum number of motors to run (0…MaxDemand)
Cfg_FirstOnFirstOff BOOL 0 1 = First started is first stopped
Cfg_AllowRotate BOOL 1 1 = Allow Rotate ("cycle lead") command to rotate motor assignments
Cfg_RotateOnStop BOOL 1 1 = Rotate the lead to end of list upon stopping all motors
Cfg_HasPermObj BOOL 0 1 = Tells HMI a permissive object (for example, P_Perm) is used for Inp_PermOK
Alias For Default Description
0 = None
1 = Stop Group
2 = Start Group
3 = Rotate Assignments
IMPORTANT: If the Ref_Motors interface array has fewer elements than the
entered value, this value is reduced to the size of the array.
0 = First started is last stopped
and navigation to the permissive object faceplate is enabled.
IMPORTANT: The name of the Permissive object in the controller must be the
name of this object with the suffix ‘_Perm’. For example, if your P_LLS object has
the name ’LLS123’, then its Permissive object must be named ‘LLS123_Perm’.
Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017 17
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