SEQUENCE CONTROL (LOGIC CHART)
Engineering Course
SEQUEN CE CON TROL
( LOGI C CH ART)
PT. Yo ko g a wa Indo ne sia
Wisma Aldiron Dirgantara 2nd floor, suite 202-209
Jl. Jend. Gatot Subroto Kav.72 Jakarta 12780
Phone : 021-799 0102, Fax : 021-799 0070
By I GS – Rev 0.0807
TYPES OF SEQUENCE CONTROL BLOCKS
The following funct ion blocks are cat agorized as sequence
cont rol blocks:
1.Sequence Table Blocks
2.Logic Chart Block
3.Sequent ial Funct ion Chart Block
4.Swit ch I nst rum ent Blocks
5.Sequence Elem ent Blocks
6.Valve Monit oring Block
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
TYPES OF SEQUENCE CONTROL BLOCKS ( 2/ 2)
LOGIC CHART BLOCK
This funct ion blocks perform s int erlock sequence cont rol program m ed in t he expression
of a logic chart diagram .
The following is t he funct ion block cat agorized as logic chart :
• Logic Chart LC64
Num ber of input elem ent s: 32
Num ber of out put elem ent s: 32
Num ber of logic elem ent s: 64
I n a logic chart block, t he condit ions and operat ions are list ed and t he com binat ion of
condit ions wit h t he logic operat iors corresponding t o t he logic requirem ent m ay
m anipulat e t he operat ion signals. This block can be used as t he descript ion of an
int erlock sequence cont rol or a logic chart .
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
( I nput Signal)
( Out put Signal)
Logic chart funct ion block can handle up t o 32 input elem ent s, 32 out put elem ent s
and 64 logic elem ent s/ operat ors ( however, logic elem ent such as W.O, SR/ Flip- Flop,
or CMP is count ed as 2 logic elem ent operat ion.
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Ge n e r a l Ou t look Of A Logic Cha
Ch a r t
• Pr oce ssin g Tim in g
There ara t wo processing t im ings:
St a r t / Ex e cu t ion Tim in g
I t refers t o t he t im ing at which cont rol algorit hm s
are execut ed when receiving input signals. Select
one of t he following t ype
- Periodic Execut ion ( T)
- One- Shot Processing ( O)
- St art up at I nit ial Cold St art / Rest art of FCS ( I )
- Rest rict ed I nit ial Execut ion ( B)
Out put Tim in g
I t indicat es t he condit ion or behaviour of act ion
signals in conj unct ion wit h t he condit ion signal
st at us change. For logic chart , t he out put t im ing is
fixed t o
- Out put Each Tim e Condit ions Are Sat isfied ( E)
• Sca n Pe r iod
Sequence t able wit h periodic execut ion t ype ( T) is
act ivat ed at defined scan period.
There are t hree t ypes of scan periods:
- Basic Scan ( 1 second – fixed)
- Medium Speed Scan ( 200 & 500 m illiseconds)
50, 100, 250 m illiseconds are also applicable.
- High Speed Scan ( 200 & 500 m illiseconds)
50, 100, 250 m illiseconds are also applicable.
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
St art / Execut ion Tim ing
Periodic Execut ion ( T)
The periodic execut ion m eans t hat t he sequence cont rol block is repeat edly execut ed in a
preset cycle.
One - Shot Execut ion ( O)
When execut ion t im ing of a funct ion block is defined as one- shot t ype, t he block is execut ed
only when it is invoked by ot her funct ion block. A one- shot funct ion block can invoke anot her
one- shot funct ion block. How ever, such succession is lim it ed t o seven blocks. I nvocat ion can
only be init iat ed from t he sam e FCS.
I nvocat ion signal
ACT.ON
I nvoking funct ion
block
ACT.OFF
Sequence process execut ion
Execut ing
One- shot t ype
funct ion block
I dle
One - Shot Pr oce ssing Conce pt ua l D ia gr a m
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
St art / Execut ion Tim ing
I nit ial Execut ion/ Rest art Execut ion ( I )
I n t his execut ion t ype, t he sequence block execut es it s process when t he FCS perform s a cold
st art or a rest art .
Rest rict ed I nit ial Execut ion ( B)
I n rest rict ed init ial execut ion, t he sequence cont rol block execut es only when t he FCS
perform s a cold st art , not include rest art .
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Out put Tim ing
Out put Each Tim e Condit ions Are Sat isfied ( E)
The sequence t able blocks out put it s operat ion/ act ion signal every scan period as long as t he
j udged condit ions are sat isfied.
Condit ion det ect ion
( false or t rue st at e)
True
Condit ion/ input
change
False
Act ion change/ int erupt ion is
not possible as long as t he
condit ion rem ains sat isfied.
True
Act ion/ out put
change
False
“Out put Ea ch Tim e Con dit ions Ar e Sa t isfie d” Con ce pt ua l Figu r e
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Funct ion Blocks and I / O Dat a)
Funct ion blocks t hat can be processed in a sequence t able are shown below.
Sw it ch I nst rum ent Block
Valve Monit oring Block ( VLVM)
Tim er Block ( TM)
Regulat ory Cont rol Blocks
Soft ware Count er Block ( CTS)
Calculat ion Blocks
Pulse Train I nput Count er Block ( CTP)
Faceplat e Blocks
Code I nput Block ( CI )
SFC Blocks
Code Out put Block ( CO)
Unit I nst rum ent Blocks
Relat ional Expression Block ( RL)
Sequence Table Blocks
Resource Scheduler Block ( RS)
Logic Chart Block
I / O dat a t hat can be processed in a sequence t able are shown below.
Processing I / O ( Digit al I nput / Out put )
Soft ware I / O ( I nt ernal Swit ch, Annunciat or, Global Swit ch)
Com m unicat ion I / O
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Swit ch I nst rum ent & Enhanced Swit ch I nst rum ent Blocks) 1/ 2
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Swit ch I nst rum ent & Enhanced Swit ch I nst rum ent Blocks) 2/ 2
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Tim er Block [ TM] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Soft ware Count er Block [ CTS] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Pulse Train I nput [ CTP] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Code I nput Block [ CI ] )
Condit ion Signal Descript ion ( Code Out put Block [ CO] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Relat ional Expression Block [ RL] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Resource Scheduler Block [ RS] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Valve Monit oring Block [ VLVM] )
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 1/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 2/ 4
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 3/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 4/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 1/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 2/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 3/ 4
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 4/ 4
The t able list s t he calculat ion
blocks t hat can be referenced
in t he condit ion signal as oneshot operat ion.
The form at is:
TAGN AM E.ACT.ON
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Faceplat e Block) 1/ 2
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Faceplat e Block) 2/ 2
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Sequent ial Funct ion Chart Block)
The following list s t he dat a
it em s of SFC block t hat can
describe dat a values in
condit ion specificat ions and
t heir set t ing ranges:
STEPN O:
1 to 99
SW CR[ 5 ] : 0 t o 1 5
SW ST[ 5 ] : 0 ,1
SW OP[ 5 ] : - 1 5 t o 1 5
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Unit Supervision Block)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Processing I / O Block)
Condit ion Signal Descript ion ( Global Swit ch)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Soft ware / Com m on Swit ch)
Condit ion Signal Descript ion ( Com m unicat ion I / O)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Annunciat or Message)
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Training Center – Technical Support Group
LABORATORY WORKS
Creat e a logic sequence from t his cont rol narrat ive:
Ca se 1
I n a cascade loop, if t he process variable of t he m ast er cont roller is
High- High alarm t hen t he slave cont roller m ode will have t o swit ch t o
MANUAL m ode and t he m ast er cont roller m ode will have t o swit ch t o
AUTO m ode.
The cont rol m ode of t he slave cont roller cannot be changed unt il t he
alarm vanishes ( process variable is in norm al st at e) .
Condit ion :
Alarm High- High
Act ion :
Mode changes t o Aut o
TI C
101
Condit ion :
Mast er cont r oller alarm high- high
Act ion :
Mode changes t o Manual
Prohibit m ode change if alarm is st ill
Mast er
Cont roller
PI C
101
TT- 1 0 1
Slave
Cont roller
PT- 1 0 1
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PV- 1 0 1
LABORATORY WORKS
Creat e a logic sequence from t his cont rol narrat ive:
Ca se 2
I n a cascade loop, if t he process variable of t he m ast er cont roller is
High- High alarm t hen t he slave cont roller m ode will have t o swit ch t o
MANUAL m ode wit h it s out put drops t o MV 25% and t he m ast er
cont roller m ode will have t o swit ch t o AUTO m ode.
However, t he operat or is allowed t o change t he m ode of slave cont roller
t o CASCADE or AUTO m ode even t hough t he process variable is st ill in
High- High alarm st at e.
Condit ion :
Alarm High- High
Act ion :
Mode changes t o Aut o
TI C
101
Condit ion :
Mast er cont r oller alarm high- high
Act ion :
Mode changes t o Manual
Out put ( MV) dr ops t o 25%
Mode change is possible in spit e of alarm
Mast er
Cont roller
PI C
101
TT- 1 0 1
Slave
Cont roller
PT- 1 0 1
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PV- 1 0 1
If
If
If
If
PSW
PSW
PSW
PSW
=
=
=
=
0,
1,
2,
3,
MV is
MV =
MV =
MV =
norm al
0% or = MSL
100% or = MSH
PMV
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
PT. Yo ko g a wa Indo ne sia
Wisma Aldiron Dirgantara 2nd floor, suite 202-209
Jl. Jend. Gatot Subroto Kav.72 Jakarta 12780
Phone : 021-799 0102, Fax : 021-799 0070
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
SEQUEN CE CON TROL
( LOGI C CH ART)
PT. Yo ko g a wa Indo ne sia
Wisma Aldiron Dirgantara 2nd floor, suite 202-209
Jl. Jend. Gatot Subroto Kav.72 Jakarta 12780
Phone : 021-799 0102, Fax : 021-799 0070
By I GS – Rev 0.0807
TYPES OF SEQUENCE CONTROL BLOCKS
The following funct ion blocks are cat agorized as sequence
cont rol blocks:
1.Sequence Table Blocks
2.Logic Chart Block
3.Sequent ial Funct ion Chart Block
4.Swit ch I nst rum ent Blocks
5.Sequence Elem ent Blocks
6.Valve Monit oring Block
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
TYPES OF SEQUENCE CONTROL BLOCKS ( 2/ 2)
LOGIC CHART BLOCK
This funct ion blocks perform s int erlock sequence cont rol program m ed in t he expression
of a logic chart diagram .
The following is t he funct ion block cat agorized as logic chart :
• Logic Chart LC64
Num ber of input elem ent s: 32
Num ber of out put elem ent s: 32
Num ber of logic elem ent s: 64
I n a logic chart block, t he condit ions and operat ions are list ed and t he com binat ion of
condit ions wit h t he logic operat iors corresponding t o t he logic requirem ent m ay
m anipulat e t he operat ion signals. This block can be used as t he descript ion of an
int erlock sequence cont rol or a logic chart .
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
( I nput Signal)
( Out put Signal)
Logic chart funct ion block can handle up t o 32 input elem ent s, 32 out put elem ent s
and 64 logic elem ent s/ operat ors ( however, logic elem ent such as W.O, SR/ Flip- Flop,
or CMP is count ed as 2 logic elem ent operat ion.
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Ge n e r a l Ou t look Of A Logic Cha
Ch a r t
• Pr oce ssin g Tim in g
There ara t wo processing t im ings:
St a r t / Ex e cu t ion Tim in g
I t refers t o t he t im ing at which cont rol algorit hm s
are execut ed when receiving input signals. Select
one of t he following t ype
- Periodic Execut ion ( T)
- One- Shot Processing ( O)
- St art up at I nit ial Cold St art / Rest art of FCS ( I )
- Rest rict ed I nit ial Execut ion ( B)
Out put Tim in g
I t indicat es t he condit ion or behaviour of act ion
signals in conj unct ion wit h t he condit ion signal
st at us change. For logic chart , t he out put t im ing is
fixed t o
- Out put Each Tim e Condit ions Are Sat isfied ( E)
• Sca n Pe r iod
Sequence t able wit h periodic execut ion t ype ( T) is
act ivat ed at defined scan period.
There are t hree t ypes of scan periods:
- Basic Scan ( 1 second – fixed)
- Medium Speed Scan ( 200 & 500 m illiseconds)
50, 100, 250 m illiseconds are also applicable.
- High Speed Scan ( 200 & 500 m illiseconds)
50, 100, 250 m illiseconds are also applicable.
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
St art / Execut ion Tim ing
Periodic Execut ion ( T)
The periodic execut ion m eans t hat t he sequence cont rol block is repeat edly execut ed in a
preset cycle.
One - Shot Execut ion ( O)
When execut ion t im ing of a funct ion block is defined as one- shot t ype, t he block is execut ed
only when it is invoked by ot her funct ion block. A one- shot funct ion block can invoke anot her
one- shot funct ion block. How ever, such succession is lim it ed t o seven blocks. I nvocat ion can
only be init iat ed from t he sam e FCS.
I nvocat ion signal
ACT.ON
I nvoking funct ion
block
ACT.OFF
Sequence process execut ion
Execut ing
One- shot t ype
funct ion block
I dle
One - Shot Pr oce ssing Conce pt ua l D ia gr a m
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
St art / Execut ion Tim ing
I nit ial Execut ion/ Rest art Execut ion ( I )
I n t his execut ion t ype, t he sequence block execut es it s process when t he FCS perform s a cold
st art or a rest art .
Rest rict ed I nit ial Execut ion ( B)
I n rest rict ed init ial execut ion, t he sequence cont rol block execut es only when t he FCS
perform s a cold st art , not include rest art .
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Out put Tim ing
Out put Each Tim e Condit ions Are Sat isfied ( E)
The sequence t able blocks out put it s operat ion/ act ion signal every scan period as long as t he
j udged condit ions are sat isfied.
Condit ion det ect ion
( false or t rue st at e)
True
Condit ion/ input
change
False
Act ion change/ int erupt ion is
not possible as long as t he
condit ion rem ains sat isfied.
True
Act ion/ out put
change
False
“Out put Ea ch Tim e Con dit ions Ar e Sa t isfie d” Con ce pt ua l Figu r e
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LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Logic Elem ent s
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Funct ion Blocks and I / O Dat a)
Funct ion blocks t hat can be processed in a sequence t able are shown below.
Sw it ch I nst rum ent Block
Valve Monit oring Block ( VLVM)
Tim er Block ( TM)
Regulat ory Cont rol Blocks
Soft ware Count er Block ( CTS)
Calculat ion Blocks
Pulse Train I nput Count er Block ( CTP)
Faceplat e Blocks
Code I nput Block ( CI )
SFC Blocks
Code Out put Block ( CO)
Unit I nst rum ent Blocks
Relat ional Expression Block ( RL)
Sequence Table Blocks
Resource Scheduler Block ( RS)
Logic Chart Block
I / O dat a t hat can be processed in a sequence t able are shown below.
Processing I / O ( Digit al I nput / Out put )
Soft ware I / O ( I nt ernal Swit ch, Annunciat or, Global Swit ch)
Com m unicat ion I / O
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Swit ch I nst rum ent & Enhanced Swit ch I nst rum ent Blocks) 1/ 2
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Swit ch I nst rum ent & Enhanced Swit ch I nst rum ent Blocks) 2/ 2
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Tim er Block [ TM] )
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Soft ware Count er Block [ CTS] )
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Pulse Train I nput [ CTP] )
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Code I nput Block [ CI ] )
Condit ion Signal Descript ion ( Code Out put Block [ CO] )
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Relat ional Expression Block [ RL] )
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Resource Scheduler Block [ RS] )
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Valve Monit oring Block [ VLVM] )
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 1/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 2/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 3/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Regulat ory Cont rol Block) 4/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 1/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 2/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 3/ 4
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Calculat ion Block) 4/ 4
The t able list s t he calculat ion
blocks t hat can be referenced
in t he condit ion signal as oneshot operat ion.
The form at is:
TAGN AM E.ACT.ON
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Faceplat e Block) 1/ 2
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LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Faceplat e Block) 2/ 2
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Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Sequent ial Funct ion Chart Block)
The following list s t he dat a
it em s of SFC block t hat can
describe dat a values in
condit ion specificat ions and
t heir set t ing ranges:
STEPN O:
1 to 99
SW CR[ 5 ] : 0 t o 1 5
SW ST[ 5 ] : 0 ,1
SW OP[ 5 ] : - 1 5 t o 1 5
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Unit Supervision Block)
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Processing I / O Block)
Condit ion Signal Descript ion ( Global Swit ch)
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Soft ware / Com m on Swit ch)
Condit ion Signal Descript ion ( Com m unicat ion I / O)
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LOGI C CHART BLOCK ( LC64)
Condit ion Signal Descript ion ( Annunciat or Message)
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
LABORATORY WORKS
Creat e a logic sequence from t his cont rol narrat ive:
Ca se 1
I n a cascade loop, if t he process variable of t he m ast er cont roller is
High- High alarm t hen t he slave cont roller m ode will have t o swit ch t o
MANUAL m ode and t he m ast er cont roller m ode will have t o swit ch t o
AUTO m ode.
The cont rol m ode of t he slave cont roller cannot be changed unt il t he
alarm vanishes ( process variable is in norm al st at e) .
Condit ion :
Alarm High- High
Act ion :
Mode changes t o Aut o
TI C
101
Condit ion :
Mast er cont r oller alarm high- high
Act ion :
Mode changes t o Manual
Prohibit m ode change if alarm is st ill
Mast er
Cont roller
PI C
101
TT- 1 0 1
Slave
Cont roller
PT- 1 0 1
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
PV- 1 0 1
LABORATORY WORKS
Creat e a logic sequence from t his cont rol narrat ive:
Ca se 2
I n a cascade loop, if t he process variable of t he m ast er cont roller is
High- High alarm t hen t he slave cont roller m ode will have t o swit ch t o
MANUAL m ode wit h it s out put drops t o MV 25% and t he m ast er
cont roller m ode will have t o swit ch t o AUTO m ode.
However, t he operat or is allowed t o change t he m ode of slave cont roller
t o CASCADE or AUTO m ode even t hough t he process variable is st ill in
High- High alarm st at e.
Condit ion :
Alarm High- High
Act ion :
Mode changes t o Aut o
TI C
101
Condit ion :
Mast er cont r oller alarm high- high
Act ion :
Mode changes t o Manual
Out put ( MV) dr ops t o 25%
Mode change is possible in spit e of alarm
Mast er
Cont roller
PI C
101
TT- 1 0 1
Slave
Cont roller
PT- 1 0 1
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
PV- 1 0 1
If
If
If
If
PSW
PSW
PSW
PSW
=
=
=
=
0,
1,
2,
3,
MV is
MV =
MV =
MV =
norm al
0% or = MSL
100% or = MSH
PMV
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group
PT. Yo ko g a wa Indo ne sia
Wisma Aldiron Dirgantara 2nd floor, suite 202-209
Jl. Jend. Gatot Subroto Kav.72 Jakarta 12780
Phone : 021-799 0102, Fax : 021-799 0070
PT YOKOGAWA INDONESIA
Training Center – Technical Support Group