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.

Preface

Lead/Lag/Standby Motor Group

(P_LLS)

Software Compatibility and Content Revisions . . . . . . . . . . . . . . . . . . . 5

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

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,	Provides information to assist with equipment
publication PROCES-SG001	procurement for your PlantPAx system.

PlantPAx Distributed Control System Reference Manual,	Provides characterized recommendations for
publication PROCES-RM001	implementing your PlantPAx system.

Rockwell Automation Library of Process Objects Reference	Provides general considerations for the PlantPAx system
Manual, publication PROCES-RM002	library of process objects.

FactoryTalk® View Machine Edition User’s Guide,	Provides details on how to use this software package for
publication VIEWME-UM004	creating an automation application.

FactoryTalk View Site Edition User’s Guide,	Provides details on how to use this software package for
publication VIEWSE-UM006	developing and running human-machine interface (HMI)
	applications that can involve multiple users and servers,
	distributed over a network.

Logix5000™ Controllers Add-On Instructions	Provides information for designing, configuring, and
Programming Manual, publication 1756-PM010	programming Add-On Instructions.

Rockwell Automation Library of Process Objects: Common	Details how to monitor an input condition to raise an
Alarm Block (P_Alarm) Reference Manual,	alarm. Information includes acknowledging, resetting,
publication SYSLIB-RM002	inhibiting, and disabling an alarm. Generally the P_Alarm
	faceplate is accessible from the Alarms tab.

Rockwell Automation Library of Process Objects:	Explains how to collect (sum up) the interlock conditions
Interlocks with First Out and Bypass (P_Intlk) Reference	that stop or de-energize a running or energized piece of
Manual, publication SYSLIB-RM004	equipment or prevent it from starting or being energized.

Rockwell Automation Library of Process Objects: Common	Explains how to choose the Mode (owner) of an
Mode Block (P_Mode) Reference Manual,	instruction or control strategy. The Mode instruction is
publication SYSLIB-RM005	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.

Rockwell Automation Library of Process Objects:	Details how to collect permissive conditions to start a
Permissives with Bypass (P_Perm) Reference Manual,	piece of equipment.
publication SYSLIB-RM007

Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017

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)

Guidelines

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.

Global Objects	Faceplate

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.)

Rockwell Automation Publication SYSLIB-RM054B-EN-P - February 2017

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

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
		process graphics.

(RA-BAS) Process Alarm Objects	(RA-BAS-ME) Process Alarm Objects	Global objects used for managing alarms on process
		object faceplates.

(RA-BAS) Process Diagnostic Objects	(RA-BAS-ME) Process Diagnostic Objects	Diagnostic global objects used on process object
		faceplates.

(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
		permissives on process object faceplates.

(RA-BAS) Process Mode Objects	(RA-BAS-ME) Process Mode Objects	Global objects used for managing modes on process
		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
		View ME faceplates use the native analog input data entry
		so no file is required.

(RA-BAS) P_Alarm-Faceplate	(RA-BAS-ME) P_Alarm-Faceplate	The faceplate that is used for managing alarms for
		the object.

(RA-BAS) P_Alarm-Help	(RA-BAS-ME) P_Alarm-Help	Alarm Help information that is accessed from the
		P_AIarm faceplate.

(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
		P_Mode object.

(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
		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.

(RA-BAS) P_Perm-Faceplate	(RA-BAS-ME) P_Perm-Faceplate	Optional
		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.

(RA-BAS) Process Interlock Family-Help	(RA-BAS-ME) Process Interlock Family-Help	Optional
		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

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	These tags must be imported into the
	where xx = the service release number.	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.
		(See Engineering Tab Page 2 on page 48) sets the number of motors.
		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

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.

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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

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

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.

Table 9 - P_LLS Input Parameters

Input Parameter	Data	Alias For	Default	Description
	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:
				0	= None
				1	= Stop Group
				2	= Start Group
				3	= Rotate Assignments

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)
				IMPORTANT: If the Ref_Motors interface array has fewer elements than the
				entered value, this value is reduced to the size of the array.

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
				0	= First started is last 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
				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

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