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How to choose between PLC and DCS depends on the specific project and plant type. Because of different applications, the requirements of the control system are also different.
In addition to some basic criteria, we must also consider the installation, scalability, maintenance and other factors. Sometimes, one choice is very suitable for a factory, and in another case it may not be. Therefore, the more factors considered in the selection of control system, the more conducive to the realization of short-term and long-term goals.
At present, although PLC system may be the most cost-effective for small equipment, DCS system provides more economical scalability and is more likely to obtain higher initial return on investment.
PLC is suitable for discrete production, generally composed of separate production devices, mainly used to complete the assembly of components, such as labeling, filling or grinding. DCS is suitable for process manufacturing. Automated systems are often used to produce by recipe rather than by piece in a continuous and batch manner. Large scale continuous processing equipment, such as refineries and chemical plants, all use DCS system. Mixed application usually uses PLC and DCS at the same time.
鈻� process scale:
Small system (<300 i / o points) may have less budget, so plc is more suitable. dcs has a b database, which is easier to manage and upgrade, and can play a more important role in large factory applications.
鈻� upgrade plan:
PLC system can be selected for small-scale industrial process, but if the process needs to be expanded or upgraded, more PLC hardware and database need to be added, and independent maintenance is needed. This process is time-consuming and laborious, and prone to errors. At this time, DCS is more suitable. As DCS is easier to upgrade, it can also manage users&锛�39; trust from the central hub, so it is easier for later maintenance.
Integration requirements:
For stand-alone device, PLC is the ideal choice. When the factory configures multiple PLCs, it will produce the requirement of interconnection. This is generally difficult to implement because it is usually necessary to map data using communication protocols. Especially when the user needs to change, once a PLC system is changed, the two PLCs may not communicate normally. DCS does not need mapping, configuration change is just a simple process, the controller is the system&锛�39;s own.
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DSCP-172H - ABB - CPU MODULE DSCP-172H
DSMB-133-2668-180-524/1 - ABB - MEMORY MODULE
DCS800-S02-0820-05 - ABB - DRIVE MODULE 500HP 0820KVA
CPU86-8MHZ - ABB - CPU BOARD 8MHZ
AD-4-064844-001 - ABB - PWA PROCESS INTERFACE BOARD
DCF1004955P0001 - ABB - OPTICAL DISTRIBUTER
61179826 - ABB - GTO REPLACEMENT KIT 180KVA IN
DSCA-180F - ABB - PC BOARD COMMUNICATION PROCESSOR
3BSC690104R2 - ABB - PROCESS TOUCH PANEL PP345 0.35AMP 100-240VAC
ACH550-UH-157A-4 - ABB - DRIVE 157AMP 380-480V 3PH
6369901-308 - ABB - MODULE MEMORY EXPANSION BOARD 6MB 25MHZ
A3010-A01-AJ - ABB - SERVO DRIVE AC AMPLIFIER
QDAI-142 - ABB - PC BOARD ANALOG INPUT
6214BZ10110G - ABB - CONTROLLER SC BACKUP MEMORY 8MB
SAFT185TBC - ABB - CONTROL BOARD SAFT185TBC
100614-001 - ABB - PC BOARD PWA VME AI32 ANALOG INP
57772239 - ABB - CPU BOARD 8MHZ
BRS5D3DR103XXP - ABB - SERVO DRIVE 10AMP 220VAC 3.1KW
503348 - ABB - PULSE AMPLIFIER CARD SAFT 170 PAC
U3AUA64079034 - ABB - DRIVE 25HP 380-480VAC SERIES 400
086155-001 - ABB - PC BOARD AIC8 PCA
57120001-DE - ABB - INPUT BOARD ANALOG 14CHANNEL PT-100 4WIRE
1743NZ10003A - ABB - OPERATOR INTERFACE 24VDC 3AMP
57120001-DE/2 - ABB - INPUT BOARD ANALOG 100MA 18-32V/+ - 15V
2021WZ10107A - ABB - CONTROLLER INTERFACE 24VDC 3AMP
SA167 - ABB - POWER SUPPLY UNIT SA167 115VAC 24VDC 25AMP
3AUA64078917 - ABB - DRIVE 15HP 11KW 380-480V IP21 NEMA1
6233BP10920 - ABB - MODULE BLOCK ASSEMBLY FOR IC660BBA101
SAFT-158-EFS - ABB - EARTH FAULT CARD
3HNE-01586-1 - ABB - QUEUE TRACKER MODULE
000401252/X005 - ABB - FLOW TRANSMITTER ELECTROMAGNETIC 100-230V 50/60HZ
3ASD-485500A111 - ABB - THYRISTOR MODULE
57772280 - ABB - INTERFACE BOARD SHARED MEMORY
SHM86-MCONT - ABB - INTERFACE BOARD SHARED MEMORY
SDCS-PIN-48 - ABB - POWER INTERFACE BOARD
SDCS-PIN-48-COAT - ABB - POWER INTERFACE BOARD
3BSE004939R002 - ABB - POWER INTERFACE BOARD
DKR-E-4501 - ABB - SERVO DRIVE 0.45/100AMP 0-310VDC 2/PE
6227BZ10200 - ABB - CONTROLLER FIELD BUS MODULE
GNT0137111P0002 - ABB - PC BOARD TYPE PV5001
6236BP10920 - ABB - ELECTRONIC ASSEMBLY FOR IC660BBA105
YSDCS-CON-1 - ABB - PC BOARD INTERFACE
DSTA 121 - ABB - CONNECTION UNIT DSTA 121
LD825EFR6004-Z - ABB - SERVO MOTOR 47.2AMP 4000RPM 280V?
LS910EPR6000-Z - ABB - SERVO MOTOR 25.8AMP 3200RPM 280V?
6152NZ10711A-608 - ABB - INDUSTRIAL COMPUTER W/OPERATOR INTERFACE
6241BP10822 - ABB - MODULE 5/12/24VDC 32SINK
H5010154N0P2BAFT00 - ABB - DRIVE 15HP 18.9AMP 3PH 440/500VAC 50/60HZ
SDCS-PIN-11 - ABB - POWER INTERFACE BOARD FOR DCS500
SDM-631-008N4-140/30-50C0 - ABB - SERVO MOTOR 5.6A 0.88COS 2.2KW 3000RPM 330V
6024BZ10300B - ABB - PROCESSOR BOARD 8MB
DKR-E-2601 - ABB - SERVO DRIVE 16AMP 220VAC 0-310VDC 50/60HZ
QDAD-100T - ABB - PC BOARD ANALOG TO DIRECT CONVERTER
DB42TE-P - ABB - COUNTER
6235BP10920 - ABB - ELECTRONIC ASSEMBLY FOR IC660BBA106
GJR6100710R0001 - ABB - GRAPHICS CARD 64K CPU 4MEG MEMORY
P-61411-0-4266643 - ABB - THERMOREGULATOR 220VAC 47-63HZ 12VA MAX
P-61411-0-4266645 - ABB - THERMOREGULATOR 220VAC 47-63HZ 12VA MAX
P-61411-0-4699923 - ABB - THERMOREGULATOR 96X96 220VAC 47-63HZ 16VA MAX
64669303 - ABB - UPGRADE KIT
MEM86-192K - ABB - CIRCUIT BOARD MEMORY CARD 192KB RAM
YB161102-BM/1-DSQC138 - ABB - TERMINAL UNIT MODULE DSQC138 40WAY
6240BP10822 - ABB - I/O MODULE ANALOG 24/48VDC 16CIRCUIT
6151NB10700 - ABB - INTERFACE MODULE CHASSIS W/COOLING FANS
PP07512HS-ABBN-5A - ABB - IGBT MODULE