ibuted control system
r
r efers to a control system usually of a manufacturinefers to a control system usually of a manufacturin hich the controller elements are not central in locati hich the controller elements are not central in locati stem with each component sub-system controlled stem with each component sub-system controlled trollers is connected by networks for communicatio trollers is connected by networks for communicatio
e DCS. The processor receives information from in e DCS. The processor receives information from in s. The input modules receive information from input s. The input modules receive information from input ctions to the output instruments in the field. Compu ctions to the output instruments in the field. Compu sor and modules through multiplexer or de-multiplex sor and modules through multiplexer or de-multiplex
echnology echnology
e.
e.
system, process system, process n (like the brain) n (like the brain) y one or more y one or more n and monitoring. n and monitoring. ut modules and ut modules and instruments in the instruments in the er buses or er buses or ers. Buses also ers. Buses alsoP a g e P a g e | 31| 31
connect the distributed controllers connect the distributed controllers computers for control and mostly us computers for control and mostly us System (DCCS) in general provides System (DCCS) in general provides YOKOGAWA DCS ARC YOKOGAWA DCS ARC Presently, FFC is using DCS syste Presently, FFC is using DCS syste Yokogawa a Japanese company. G Yokogawa a Japanese company. G Yokogawa CS3000 is described as Yokogawa CS3000 is described as following main parts:
following main parts: 1. FCS cabinets 1. FCS cabinets
2. Human interface machines (HIM) 2. Human interface machines (HIM) 3. Engineering work station (EWS) 3. Engineering work station (EWS) All transmitters installed all over the All transmitters installed all over the in the form of current signal to the D in the form of current signal to the D wires terminate at the nest which c wires terminate at the nest which c the nest then connects to the one n the nest then connects to the one n These nodes then connect to the c These nodes then connect to the c Field Control Unit (FCU) through RI Field Control Unit (FCU) through RI provide interface between FCS cabi provide interface between FCS cabi Interface Unit. HMI are also connec Interface Unit. HMI are also connec Ethernet and also to Engineering w Ethernet and also to Engineering w following completely illustrate the w following completely illustrate the w connections between different parts connections between different parts FIELD CONTROL STATION (FCS)
FIELD CONTROL STATION (FCS)
The FCS controls the plant. By th The FCS controls the plant. By th namely the FCS for FIO and the F namely the FCS for FIO and the F FCS.
FCS.
FCS for RIO FCS for RIO
This FCS uses the Remote I/O ( This FCS uses the Remote I/O ( terminals to connect signal cables. terminals to connect signal cables. and the enhanced model.
and the enhanced model.
Human Interface Statio Human Interface Statio The HIS is mainly used for oper The HIS is mainly used for oper process variables, control param process variables, control param users to quickly grasp the oper users to quickly grasp the oper
Dawood University of Engineering & Dawood University of Engineering & ith the
ith the central controller and central controller and DCS typically containDCS typically contain e both propriety interconnections and protocols Dist e both propriety interconnections and protocols Dist : for communication. : for communication. ITECTURE ITECTURE manufactured by manufactured by eneral architecture of eneral architecture of follows. It consists of the follows. It consists of the
plant sent their information plant sent their information CS system. All the field CS system. All the field ntains the I/O cards. Four of ntains the I/O cards. Four of o
ode interface unit (NIU).de interface unit (NIU). ntral processing unit called ntral processing unit called /O buses. Vnet cables /O buses. Vnet cables inets and to the Human inets and to the Human ted to each other over ted to each other over rk station (EWS). The rk station (EWS). The hole systems and hole systems and
of it. of it.
difference of used I/O modules, there are two m difference of used I/O modules, there are two m S for RIO. In addition to the above models, there is S for RIO. In addition to the above models, there is
RIO) modules, which have many installation bas RIO) modules, which have many installation bas According to the application capacity, there are t According to the application capacity, there are t
(HIS) (HIS)
tion and monitoring – it displays tion and monitoring – it displays eters, and alarms necessary for eters, and alarms necessary for ting status of the plant. It also ting status of the plant. It also
echnology echnology one or more one or more ributed Control ributed Control odels of the FCS; odels of the FCS; the Compact type the Compact type
es and M4 screw es and M4 screw e standard model e standard model
P a g e P a g e | 32 | 32
incorporates open interfaces so t incorporates open interfaces so t process data.
process data.
• Console Type HIS • Console Type HIS
This is a new console type human i This is a new console type human i two types of console type HISs: on two types of console type HISs: on another is open display style, the c another is open display style, the c • Desktop Type HIS
• Desktop Type HIS
This HIS uses a general purpose P This HIS uses a general purpose P
CON
CON
TOPICS TOPICS TOPICS TOPICS TOPICS TOPICS TOPICS TOPICS
Dawood University of Engineering & Dawood University of Engineering & hat supervisory computers can access trend dat hat supervisory computers can access trend dat
nterface station, at which a general purpose PC is i nterface station, at which a general purpose PC is i is enclosed display style, the appearance of which is enclosed display style, the appearance of which nfiguration of which is selectable.
nfiguration of which is selectable.