<<Contents>> <<Index>>
General
Specifications
GS 33Q03K90-31E
R3
Model LFS1000
Standard Control Function (for PFC䊐-S)
Model LFS1020
Enhanced Control Function (for PFC䊐-E)
■ GENERAL
This GS covers the specifications of the Standard and
Enhanced Control Functions installed in the Field Control
Stations (FCS):
FCS with Standard Control Function: PFCS-S, PFCD-S
FCS with Enhanced Control Function: PFCS-E, PFCD-E
■ FUNCTION SPECIFICATIONS
● Structure of Control Functions
The basic control functions are implemented as a two-level
hierarchy, described below. Such a hierarchical model
facilitates engineering and modification/addition of
functions.
Function Blocks
These are the smallest elements used to perform control
and calculation, and are at the bottom of the hierarchy.
Control Drawing
A control drawing represents the control instruments
responsible for overall control of a small section of the
plant, and typically contains several function blocks. A
control drawing may be used to implement cascade control
or combustion fuel/air ratio control, for example.
● Function Blocks
The function blocks are divided into regulatory and
sequence control blocks, calculation blocks, faceplate
blocks and unit instruments. These function blocks may
be combined to configure a control drawing.
Regulatory Control Blocks
These function blocks are mainly used for feedback
control.
Input Indicator Blocks: Input indicator, Input indicator
with deviation alarm
Controller Blocks: PID controller, Sampling PI controller,
PID controller with batch switch, Two-/
Three-position ON/OFF controllers, Timeproportioning ON/OFF controller, PD
controller with manual reset, Blending PI
controller, Self-tuning PID controller
Manual Loader Blocks: Manual loader, Manual loader
with input indicator, Manual loader with Auto/
Man SW, Two-/Three-position motor control
Signal Setter Blocks: Ratio set, 13-zone program set,
Flow-totalizing batch set, Weight-totalizing
batch set
Signal Limiter Block: Velocity limiter
Signal Selector Blocks: Autoselector, Signal selector,
Dual-redundant signal selector
Signal Distributor Blocks: Cascade signal distributor,
Feedforward signal summing, Non-interference control output, Control signal splitter
Alarm Block: Representative alarms
Pulse Count Input Block: Pulse count input
YS Instrument Blocks: YS controller, YS programmable
controller, YS programmable controller with
pulse-width output, YS manual station with
SV output, YS manual station with MV
output lever, YS ratio set station, YS batch
set station, YS blending controller, YS batch
controller, YS totalizer
Sequence Blocks
These function blocks are mainly used for interlock and
batch control sequences.
Sequence Table Blocks: Table type sequence
Sequence table (Total no. of inputs/outputs: 64.
Number of rules: 32)
Rule extension (Each expansion table adds 32 rules to
Sequence Table)
Logic Chart Block: Interlock block diagram to describe
the relationship between input and output
signals with logical operators. It consists of
32 inputs, 32 outputs, 64 logical operators.
The following logical operators are available:
AND, OR, NOT, Set-/Reset-dominant flipflop with 1 or 2 outputs, Wipeout, ON-/OFFdelay timers, One-shot, Comparator (<, = >,
=)
Switch Instrument Blocks: Mainly used to operate and
monitor motors and valves.
1 input, 2 inputs, 1 output, 2 outputs, 1 input
1 output, 1 input 2 outputs, 2 inputs 1 output,
2 inputs 2 outputs, 1 input 2 one-shot
outputs, 2 inputs 2 one-shot outputs
Sequence Element Blocks: Mainly used to generate
input signals for sequence tables
Sequence Elements 1: Timer, Software counter, Pulse
train input counter, Code input, Code
output
Sequence Elements 2: Relational expression,
Resource scheduler
Valve Monitor Block: Monitor the status of valves (16point monitoring)
SFC Blocks: Describe sequences in SFC Graphical
Language: Three-position switch SFC,
Pushbutton SFC, Analog SFC
Yokogawa Electric Corporation
2-9-32, Nakacho, Musashino-shi, Tokyo, 180-8750 Japan
Tel: 81-422-52-5634 Fax: 81-422-52-9802
GS 33Q03K90-31E
©Copyright Jan. 2001
1st Edition Feb.18,2005
2
<<Contents>> <<Index>>
Calculation Blocks
These function blocks are mainly used to perform calculations.
Arithmetic Calculation Blocks: Addition, Averaging,
Multiplication, Division
Analog Calculation Blocks: Square root, Exponential,
First-order lag, Integration, Derivative,
Ramp, Lead/lag, Dead-time, Dead-time
compensation, Moving-average, Cumulativeaverage, Variable line-segment function,
Temperature and pressure correction, ASTM
correction: Old JIS, ASTM correction: New
JIS
General-Purpose Calculation Blocks: General-purpose
calculation, General-purpose calculation with
string I/O
Auxiliary Blocks: Three-pole three-position selector
switch, One-pole nine-position selector
switch, Selector switch for 16 data, Selector
switch for 16 string data, Data set, Data set
with input indicator
Batch Data Blocks: One-batch data set, One-batch
string data set, Two-batch data set, Twobatch string data set, Batch data acquisition,
Batch string data acquisition
Faceplate Blocks
These allow several function blocks to be represented by a
single tag with faceplate man-machine interface.
Analog Faceplate Blocks: Groups the control loops of a
multi-block configuration as a single tag
Dual-pointer indicating station: Indicates PVs and sets
SVs
Dual-pointer manual station: Sets SVs and manipulated output values
Triple-pointer manual station: Indicates PVs and sets
SVs and manipulated output values
Sequence Faceplate Blocks: Used for push-button
operation from the HIS, and display and
operation of sequence processes as a manmachine interface for sequence control
functions
Batch status indicator: Displays sequence processes
and lamps of 3-push-button switch, and
used for push-button operation
Extended 5-push-button switch: Displays lamps of 5push-button switch and used for pushbutton operation
Hybrid Faceplate Block: Has the functions of analog and
sequence faceplate blocks
Extended hybrid manual station: Has the functions of
triple-pointer operating station and 5 pushbutton switch
All Rights Reserved. Copyright © 2005, Yokogawa Electric Corporation
Enhanced MC/Switch Instrument Block (available only
in PFCS-E, PFCD-E)
This block includes enhanced versions of functions
incorporated in normal ON/OFF controller blocks, motor
control blocks, and switch instrument blocks, to facilitate
migrating from competitors' control systems. In addition to
functions in normal instruments, the following functions are
added. Enhanced MC/Switch Instrument blocks are
standard functions and need optional memory areas of 64
KB when they are used.
Individual Wiring: The open/close or open/close/stop
signals for 2-position pulsive outputs, or 3position (pulsive or status) inputs or outputs
of a standard function block can only be
connected to contiguous terminals on the
same module. For an enhanced function
block, however, these input and output
signals can be independently connected to
arbitrary terminals.
For migration from other company's control
systems, enhanced ON/OFF controllers,
enhanced motor control blocks, and
enhanced switch instrument blocks can be
connected without needing rewiring even
though cards with open and close signals
from different cards are connected.
Masking of Answerback Undefined Alarm (PERR):
Checking of the answerback undefined
alarm (PERR) is overridden for a preset time
after an open or close (or run or stop) action.
Where the answerback signals of a field
device are input from different modules, the
simultaneity of those answerback signals
cannot be assured. In these cases, masking
the PERR alarm check will prevent unnecessary alarms from occurring.
There are the following as Enhanced MC/switch instrument block.
Enhanced ON/OFF controller: Two-position enhanced
ON/OFF controller, Three-position enhanced
ON/OFF controller.
Enhanced motor control: Enhanced two-position motor
control, Enhanced three-position motor
control.
Enhanced switch instrument block: Enhanced 1 input,
Enhanced 2 input, Enhanced 1 output,
Enhanced 2 output, Enhanced 1 input 1
output, Enhanced 1 input 2 output, Enhanced 2 input 1 output, Enhanced 2 input 2
output, Enhanced 1 input 2 one-shot output,
Enhanced 2 input 2 one-shot output.
GS 33Q03K90-31E
Feb.18,2005-00
3
<<Contents>> <<Index>>
● Unit Supervisory Function
The devices and instruments used to control a plant can
be defined as a single unit for operation and control
purposes.
Unit Instruments: Analog, 5-push-button switch, 3position switch
Operations: SFC, SEBOL, SFC with floating-data
parameters, SFC with character-data
parameters, SFC with floating/characterdata parameters, SFC with integer/character-data parameters, SFC with floating/
integer-data parameters
● Internal Switch and Message Output Functions
The control functions have internal switch and message
output functions.
Internal Switches
Used as buffers for storing statuses.
Common Status Switches: Accessible within the FCS
Global Switches: Transmits status data to other stations
in the system via V net communication
Message Output Function
This function notifies events from the FCS to another
FCS, HIS or computer. Messages are sent by sequence
functions. There are the following messages:
Annunciator Message: Has annunciator function of
instrument panel
Sequence Message: Initiates action on HIS or supervisory computer — prints messages, displays
operator guide messages, or prompts for
data entry.
Event Message: Sends signal event message and SFC
return event message to other functions
within the FCS
■ APPLICATION CAPACITY
The “application capacity” represents the number of control functions that can be executed simultaneously.
Items
For elements per FCS (*1)
Standard
Enhanced
2,000 (*3)
500
Numbers of Tags
For function blocks and elements per control area (*2)
1,500
No. of I/O units
1,500
5
5
128
128
Process I/O (*4)
Total of analog I/O points
512
512
Communication I/O
Data volume (in 16 bit units)
1,000
4,000
No. of common switches
1,000
1,000
Total of contact I/O points
Internal Switch
No. of Global switches (*5)
Message Output
Control Function
–
256
No. of annunciator message outputs
200
200
No. of message outputs (print, operator guide, request, event)
100
100
50
50
128
256
No. of control drawings
High-speed (1 second / 10 seconds) Trend Acquisition
T01E.EPS
*1:
*2:
*3:
*4:
*5:
The number of tag names for elements per FCS indicates the maximum number of a total of contact inputs/outputs (%Z
elements), common switches (%SW elements), and communication inputs/outputs (%WB elements) to which tag names can be
assigned. However, up to a thousand %WB elements can only be given tag names.
The number of tag names for elements per Control area indicates the maximum number of total of function blocks (%BL
elements) and annunciators (%AN elements) to whitch tag names can be assigned.
When a batch control type (Type K or L) database is used, the number is 2,500. See the table of Enhanced FCS Database,
shown below, for further information.
Process I/O capacity depends on the number of I/O modules installed.
Available only in PFCS-E, PFCD-E.
Scan Period
The CPU of the FCS can execute the control functions in any of two scan periods. One of the two scan periods can be set
for each function block.
Standard Scan Period: 1 sec.
Fast Scan: 50, 100, 200, 250 or 500 ms may be specified.
Inter-station Connections
Number of other stations’ data that can be read an written: 160
Database
Select the database type at system generation time, according to your needs. The number of function blocks for the
general-purpose database type is shown below:
All Rights Reserved. Copyright © 2005, Yokogawa Electric Corporation
GS 33Q03K90-31E
Feb.18,2005-00
4
<<Contents>> <<Index>>
● Standard FCS Database
Models PFCS-S, PFCD-S
Database type
Block type
Generalpurpose type
Regulatory
monitoring
type
Standard
sequence
control type
Sequence
monitoring
type
Regulatory
control type
Standard
sequence type
Regulatory control block
Calculation block (Arithmetic,
Analog, Auxiliary)
80
500
250
50
50
100
Sequence table block (*1)
Logic chart block
80
30
50
30
120
80
Switch instrument block
Sequence element block 1
400
40
120
500
300
400
Faceplate block
Other block (Sequence element
block 2, Batch data block)
20
30
20
30
40
50
General calculation block
80
10
50
10
30
50
SFC block (*2)
5
5
5
5
5
5
Unit instrument
0
0
0
0
0
0
Operation
0
0
0
0
0
0
T02E.EPS
*1:
*2:
Sequence table: Total of inputs and outputs is 64 . The number of rules is 32.
Each SFC block can contain about 200 SEBOL statement lines (not counting blank lines or comments). Som individual SEBOL
blocks can be larger than this maximum if the average SEBOL block size does not exceed the maximum.
All Rights Reserved. Copyright © 2005, Yokogawa Electric Corporation
GS 33Q03K90-31E
Feb.18,2005-00
5
<<Contents>> <<Index>>
● Enhanced FCS Database
Models PFCS-E, PFCD-E
Database
Block type
Type
A
Type
B
Type
C
Type
D
Type
E
Type
F
Type
G
Type
H
Type
I
Type
J
Type
K
Type
L
Regulatory control block
Calculation block (Arithmetic,
Analog, Auxiliary)
250
80
80
50
50
50
100
100
100
80
100
100
Sequence table block (*1)
Logic chart block
50
80
80
120
120
120
80
80
80
80
50
120
Switch instrument block
Sequence element block 1
120
400
400
300
300
300
400
400
400
400
400
400
Faceplate block
Other block (Sequence element
block 2, Batch data block)
20
20
20
40
40
40
50
50
50
20
50
120
General calculation block
50
80
80
30
30
30
50
50
50
200
80
80
10
(*4)
SFC block (*2)
10
5
5
10
10
10
10
10
10
5
10
(*4)
Unit instrument (*3)
0
2
2
10
0
10
10
0
10
2
15
15
Operation
0
30
30
100
0
100
100
0
100
30
120
(*4)
120
(*4)
Recipe area
0
0
0
0
0
0
1 MB
0
1 MB
0
500 KB
0
500 KB
0
C compiler/Option area
500 KB 500 KB
0
500 KB 500 KB
500 KB 500 KB 500 KB 350 KB 350 KB
T03E -1.EPS
*1:
Sequence table: Total of inputs and outputs is 64. The number of rules is 32.
Type A:
Enhanced Regulatory Control (C compiler)
Type B:
Unit Control
Type C:
Unit Control (C compiler)
Type D:
Standard SEQ Control (Unit)
Type E:
Enhanced SEQ Control (C compiler)
Type F:
Enhanced SEQ Control (Unit / C compiler)
Type G:
Standard SEQ (Unit)
Type H:
Enhanced SEQ (C compiler)
Type I:
Enhanced SEQ (Unit / C compiler)
Type J:
General (Calculation Oriented)
Type K:
Batch Control (SEBOL Oriented with Recipes)
Type L:
Batch Control (Sequence Table Oriented with Recipes)
*2:
Each SFC block can contain about 200 SEBOL statement lines (not counting blank lines or comments). Som individual SEBOL
blocks can be larger than this maximum if the average SEBOL block size does not exceed the maximum.
*3:
Each unit instrument may include unit procedures amounting to about 15 steps. Some individual unit instruments can be larger
than this maximum if the average size does not exceed the maximum.
*4:
The templates of SEBOL Oriented batch control and Sequence table oriented batch control have the same capacity for the
number of SFC blocks and operations. Regarding to SEBOL oriented batch control, with consideration of SEBOL engineering,
the areas for SEBOL programs and the SEBOL variables are expanded.
All Rights Reserved. Copyright © 2005, Yokogawa Electric Corporation
GS 33Q03K90-31E
Feb.18,2005-00
6
<<Contents>> <<Index>>
■ OPTIONAL SOFTWARE PACKAGES
■ OPERATING ENVIRONMENT
The following optional software packages can be used with
Control Function.
Hardware Requirement
Model LFS1000 Standard Control Function runs on:
FCS Models: PFCS-S, PFCD-S
Model LFS1020 Enhanced Control Function runs on:
FCS Models: PFCS-E, PFCD-E
Memory size in option area required by each package is
shown inside parentheses ( ). Items without such
descriptions do not need memory.
When optional software packages are used, the sum of the
memory sizes necessary for those optional packages shall
not exceed the memory size of option areas of databases.
In addition, when using enhanced MC/switch instruments
as standard functions, which need an optional memory
area of 64 KB, add this to the required memory size.
• LFS2210
FA-M3 Communication Package
(for ACM11, ACM12)
• LFS2211
DARWIN Communication Package
(for ACM11)
• LFS2220
YS Communication Package (for ACM12)
• LFS2230 (350 KB) MELSEC-A Communication
Package (for ACM71)
• LFS2231 (350 KB) FA-M3 Communication Package
(for ACM71)
• LFS2232 (350 KB) DARWIN/DAQSTATION
Communication Package
(for ACM71)
• LFS2253 (350 KB) Modbus Communication Package
(for ACM71)
(available only in PFCS-E, PFCD-E)
• LFS2510
Foundation Fieldbus Communication
Package (for ACF11)
• LFS2540
PROFIBUS Communication Package
(for ACP71)
• LFS9053 (30 KB) Modbus Communication
Package (for ACM11, ACM12) (*1)
• LFS9054
A-B Communication Package
(for ACM11, ACM12)
• LFS9055
Siemens Communication Package
(for ACM11, ACM12)
• LFS9056
SLC 500 Communication Package
(for ACM11)
• LFS9062
MELSEC-A Communication Package
(for ACM11, ACM12)
• LFS9063
SYSMAC Communication Package
(for ACM11, ACM12)
• LFS9074 (500 KB) PLC-5/SLC 500 Communication
Package (for ACM71)
*1:
■ MODELS AND SUFFIX CODES
Model
Description
Standard Control Function
LFS1000
(for PFCS-S, PFCD-S Standard Field Control Station)
T04E.EPS
Note: Specify with suffix codes for FCS.
Model
Description
Enhanced Control Function
LFS1020
(for PFCS-E, PFCD-E Enhanced Field Control Station)
T05E.EPS
Note: Specify with suffix codes for FCS.
■ TRADEMARKS
• CENTUM and DARWIN are registered trademarks of
Yokogawa Electric Corporation.
• Modbus is registered trademark of Schneider Electric
and/or such related companies.
• MELSEC-A is a registered trademark of Mitsubishi
Electric Corporation.
• SYSMAC is a registered trademark of Omron Corporation.
• “FOUNDATION” of “FOUNDATION fieldbus” is a registered
trademark of Fieldbus Foundation.
• PLC-5 and SLC are trademarks or registered trademarks of Rockwell Automation, inc.
• Other product and company names appearing in this
document are trademarks or registered trademarks of
their respective holders.
Memory can be used for dual-redundant use only.
All Rights Reserved. Copyright © 2005, Yokogawa Electric Corporation
Subject to change without notice.
GS 33Q03K90-31E
Feb.18,2005-00
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