I would go with 1500 or ET200SP. Look for TM Pulse 2x24V - Control of proportional valves and DC-motors module for ET200SP if you have a propotional valve, then you have also TM Posinput 1x24V Counting and positioning Module, you can use it as absolute SSI encoder input module.

http://w3.siemens.com/mcms/distributed-io/en/ip20-systems/et-200sp/peripheral-modules/Pages/default.aspx?tabcardname=technology%20modules

But it depends on what is the real application, type of valve (servo, proprtional); type of control (position, speed). With selected two modules you can position a hydraulic axis with servo or proportional valve (2A max current per coil) and a feedback sensor SSI or incremental. You do the positioning with PLCOpen blocks, I guess you can't control the pressure and stop to the fixed limit (unless you do some switch from positioning to the jog mode).

tfm-mx

Hello :

what is the best equipment for making a closed loop control for hydraulic equipments, in the past the injection molding machine were built in  platform S5 and analog card 6ES5252-3AA21

if i want to create a close loop control simila to that, what are producs that can i use ??

s300

s1200

s1500

Closed-loop control module 6ES5252-3AA21 is a special version of the IP252 modules with a special firmware for the 12MHz applications.
It was developed specially for fast closed-loop controller tasks in synthetic materials technology and for hydraulic drives.

One Possibility is to Use SIMOTION D410 ( Only 1 Loop ) / D425 / D435 ( For Multiple loops ) which supports control of Hydraulic axes and can be flexibly programmed.

More Information :

TO Axis Electric / Hydraulic, External Encoder

Hydraulic axis positioning, pos. control output

Hydraulic application with D410-2

The Simotion can also be used for Rest of the logic or SIMOTION can be dedicated for the Hydraulic Control while another PLC ( S7-300 / S7-400 / S7-1500 - Depending on the no of I/Os ) handles the remaining logic. The two can communicate on Profibus / Profinet 

Hope this helps

Cheers
Navnag

Marko Bursic

In that case I would prefer an embedded valve like Bosch Rexroth which communicates with profidrive. It can do almost anything with hydraulics, IMO the Simotion is too hard/complex.

Yes SIMOTION is a bit complex to use but I must add that the additional effort is worth it.

Generally, however you don't have to re-invent the wheel and program from scratch, as there are a lot of standard applications and sample programs available.

Cheers
Navnag

its depend on process automation

for simple automation close loop task s7-1200

and for advance close loop task I prefer s7-1500 cpu

Marko Bursic

If you have time to wait, they announced a new  S7-1500T CPU that is replacement for S7-317T, it's a technology CPU for motion tasks including hydraulic axes.

 If I were you, I would wait for at least 1 year before I put my hands on any new CPU with TIA.
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