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http://www.ti.com/corp/docs/redirect/siemens.htm TI ceased manufacturing and supporting programmable logic controllers (PLCs) and other products of its industrial controls business based in Johnson City, Tennessee (the "Business") in October 1991, when it sold the Business to Siemens...

This is something a motor manufacturer would be interested in rather than Control Engineers. However a brief comparison suggests polyurea grease can handle higher running temperatures and harsher environments. I would guess from that it would be more expensive.

It's assumed from your brief description that the plant has dual redundant S7-400 processors with high integrity / failsafe I/O. We can only guess at what happened - the best course would be to flag the issue on the Siemens Automation forum...

You can add an output providing there is room in the rack for it. Once you have decided on the type you can obtain a manual for it from the Simens Automation website. Configuration is under the Hardware Configuration heading where you need to add I/O mapping...

There are many types of protocol converters several linked below - some are limited to Modbus RTU so you need to check your client requirements: http://www.prosoft-technology.com/Products/Gateways/Modbus-Master-Slave/Modbus-Master-Slave-to-PROFIBUS-DP-Slave-Gateway...

You'll have to give us a little more information on what you are trying to achieve. I'm guessing you have rotating shaft but which direction is the free float and where does the -10 come in.

You'll have to give us a little more information on what you are trying to achieve. I've used motion control in hydraulic systems - vector control techniques simply would not work.

There are various sludge/slurry meters on the market, but suggest you search for distributors local to your area as most meters are for sludges and industrial wastes, not for ash. You would need to ask them how capable and accurate their devices would be. Here in the UK major systems convey...

Since Device Net is not fail safe, one would use a hardwired Emergency Stop as standard procedure.

Do you know why your client prefers a single transmitter and what precisely is the device. One way round the subject is HAZOP meeting where the fail safe / fail to danger and the implications can be discussed at length.

You'll have to give us a little more information on the type of valves you have. Are they thermal valves that operate on temperature? Or valves that have actuators thermally (and maybe overload) protected?

Having used ETAP it appears to me be simple and straightforward to use. Looking at DigSILENT specs it appears more suitable for more complex simulations, and since it appears to be a German product more appropriate for use in Europe than US based ETAP.

Not that familiar with these transmitters - perhaps a Technical Note may help: http://www2.emersonprocess.com/siteadmincenter/PM%20Rosemount%20Documents/00840-0100-4601.pdf

These can explain better than I - Siemens of course is overcomplicated as expected..... http://testcon.info/FB_EN_Dreipunktschrittregler.html https://cache.industry.siemens.com/dl/files/232/18748232/att_111202/v1/three_step_e.pdf

There appears to be no manual for the Scout but the following may be helpful: https://www.siemens-pro.ru/docs/simatic/s7-1200/39960679_S7-1200_OPC_SIMATIC-NET_e.pdf https://cache.industry.siemens.com/dl/files/679/39960679/att_117996/v3/39960679_s7-1200_opc_simatic-net_tia-portal_e.pdf...

If you have connected to the CPU programming port, I believe it will be looking for Profibus and Profinet protocols - one of the four Communication Modules will give you Modbus protocol (RTU) although at RS232/485 not ethernet.

Which PLC would you like? Allen Bradley (Rockwell), Siemens, Mitsubishi etc. most modern PLC's will give PID functionality. You haven't stated what the inverter is for or how you intend to interface the PLC to it. I would guess similar to an inverter motor drive with several digital controls...

The manual suggests hardware fault: - lightning, - improper grounding, - lack of surge suppression on outputs with inductive loads - poor power source. These are points that should have been dealt with at design/build/installation Many years ago and after quite a few PSU changes, we...

Perhaps this peer review is useful. https://www.energy.gov/sites/prod/files/2014/02/f7/aircooledcondensers_peerreview2013.pdf Not sure how a P&ID would help as the condenser is a component part of a process - same applies for control logic.

Generally 3 point control is to provide basic step control to a device such as open/close a valve as in your example. 3 Term control (PID) is too complex and is impractical as you have only open and close commands without any idea of valve position. Assuming your valve servo motor can inch...