V0N_hydro
Member
I have started a new thread for this discussion.
Previously I asked:
If you were migrating from quantum to siemens, would the equivalent siemens PLC be the S7-300 or S7-400?
I am thinking the S7-300 is more like the M340 and the S7-400 is on par with the Quantum?
To which OZEE replied:
You really ought to start a new thread for this instead of piggy-backing on an unrelated 2-year old thread.
We'd really need to know more about your application before anybody can make that kind of recommendation. Things like amount of distributed I/O, PID's, etc., will play a lot more into the decision than just the "physical architecture".
Honestly, unless you're into a really large system a -300 will most likely do everything you need and more.
And now V0n would like to supply more information:
My application is control of turbine-generators. Typically have 640 IO; 200 on main rack, two remote IO racks located within 100m of the main rack with 200 IO each, and another remote IO rack 500m-10km away on fibre with 40IO.
There are usually 5 PIDs, of which only two need a response time less than 100ms. I have one high speed counter for measuring period of 60Hz signal.
My application doesn't warrant redundant CPUs, and there are no spares around for hot-swapping, so if the difference between S7-300 and and s7-400 is redundant CPU and swapping IO without stopping the PLC or building the program, that isn't a reason for us to use S7-400 PLC.
Anyone who is familiar with the practical difference between S7-300 and S7-400 please chime in!
Previously I asked:
If you were migrating from quantum to siemens, would the equivalent siemens PLC be the S7-300 or S7-400?
I am thinking the S7-300 is more like the M340 and the S7-400 is on par with the Quantum?
To which OZEE replied:
You really ought to start a new thread for this instead of piggy-backing on an unrelated 2-year old thread.
We'd really need to know more about your application before anybody can make that kind of recommendation. Things like amount of distributed I/O, PID's, etc., will play a lot more into the decision than just the "physical architecture".
Honestly, unless you're into a really large system a -300 will most likely do everything you need and more.
And now V0n would like to supply more information:
My application is control of turbine-generators. Typically have 640 IO; 200 on main rack, two remote IO racks located within 100m of the main rack with 200 IO each, and another remote IO rack 500m-10km away on fibre with 40IO.
There are usually 5 PIDs, of which only two need a response time less than 100ms. I have one high speed counter for measuring period of 60Hz signal.
My application doesn't warrant redundant CPUs, and there are no spares around for hot-swapping, so if the difference between S7-300 and and s7-400 is redundant CPU and swapping IO without stopping the PLC or building the program, that isn't a reason for us to use S7-400 PLC.
Anyone who is familiar with the practical difference between S7-300 and S7-400 please chime in!