TimeFluxCap
Member
labingtone said:TimeFluxCap,
If you plan to upgrade use the latest version CS3000 3.07 version. This run on a Ethernet platform.
Is that the gigabit ethernet? Now that is fast!
labingtone said:TimeFluxCap,
If you plan to upgrade use the latest version CS3000 3.07 version. This run on a Ethernet platform.
ria112 said:please help me out
difference between plc & dcs with example
http://www.plctalk.net/qanda/showthread.php?t=15765
BY LJAM
Most of the confusion comes from the roots of both systems. PLC were first created for and by electrical engineers to replace electrical relay panels (I believe GM engineers start it all). On the other hand, DCS systems were developed to replace pneumatic controllers … initially with logic performed by integrated circuit in cards and later by microprocessors.
As a user of both systems for the pass 15 years, I have seen how technological advances have draw closer together both systems to the point that many DCS’s manufacturer are talking about hybrid systems (i.e. Honeywell Experion PKS: Allen-Bradley Contrologix hardware and Honeywell firmware) … Emerson Fisher-Rousemount Delta V is another example of a hybrid system. Hybrid systems target medium size applications and compete with medium to large PLC systems.
In my opinion the gap between the two technologies was reduced considerably by improvements in the communication and networking capabilities of PLC’s, along with the raising in popularity of field buses (which also imply the usage of better and faster processors).
PLC’s still are the preferred system for control applications in manufacturing environments where sequencing and interlocking are the main concern. DCS’s are and will be (for the years to come) the preferred system for control systems at the top end of the process industry (i.e. we commissioned and thermal power plant of 60,000 tags). The middle point between those two is where both systems fight for supremacy.
The main points to consider before making a decision on whether use one or the other are:
§ The system number of tags and I/O (system capabilities).
§ Control strategies and the right engineering tools (the right tool will make the engineer easier and faster).
§ Hardware and support cost.
Time based?!? How to work method?By SIR
3) Software execution and I/O handling
PLC => scan based
DCS => time based
labingtone said:TimeFluxCap,
If you plan to upgrade use the latest version CS3000 3.07 version. This run on a Ethernet platform.
As others have stated on this old topic, both can control an application (PID and/or simple logic), it depends on what you want: (This may be an overly gross simplification in some cases)omer53 said:Actually i was trying to understand the diffrence between PLC &
DCS. but i still could'nt find a solid answer about it.
is it
DCS is for PID controls
PLC is for basic controls like Analog and digital I/O s but (which can also done by DCS too.
what else a dcs can do which a PLC cant
...
really need your help
thankx is Advance