DCS VS PLC comparison contains detailed comparison of DCS (Distributed Control System) and PLC (Programmable Logic Controller) in following prospectus
- Response Time
- Scalability
- Redundancy
- Complexity
- Frequent Process Change
- Operation
- Supplier
1. Response Time
PLC is 10 times faster than DCS in Interlock application, Emergency shutdown.
2. Scalability
PLC contains less modules than DCS system.
DCS can be install several 1000s IO (Input /Output) Modules
PLC is more suitable for Small Batch Process Plant
DCS operating system is better in Large Continuous plants
3. Redundancy
Redundancy means IO Module working with minimum faults. Less Problems occur in DCS.
4. Complexity
DCS has more capability to adapt Latest equipments / Instruments and Inventions.
5. Frequent Process Changes
If Process Changes happening in Plant then DCS is more easy to get change.
PLC Flow Charts ( Sequence) can not easily changed.
6. Operation
PLC is working Fast in Small to medium scale plants.
DCS is good for Large scale continues plants.
7. Supplier
PLC is a registered trademark of ROCKWELL AUTOMATION and ALLEN BREADLY Company
DCS is supplied by
YokogawaEmersionHoneywellFoxboroABBASiemensMetso