Introduction to ET 200SP Base Unit (Overview & Usage)

[@thorsten888]

I knew all of this, but this was the best explaining instruction I've found to date and I will bookmark it as a reference to my colleges when they have their first Siemens project.

[@realpars]

Hi Daniel, Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!

[@derina.maleek9408]

thats why every week i hold my breathe and wait realpars video thanks#

[@realpars]

You are welcome, Derin! :)

[@barbaluti]

Amazing video. Siemens' documentation is hopeless at explaining anything in a clear fashion. I'm very thankful for your help.

[@realpars]

Glad it was helpful! Thank you for sharing.

[@harshanamaduranga1412]

I am a electrical engineering student. this video series is more valuable. thank you.

[@realpars]

That's amazing to hear! Thanks for sharing

[@cyrox1859]

I have been working with ET200 for two years and I noticed that the first left base unit was white but until now I did not know the cause thank you so much

[@realpars]

Great to hear that we helped you clear that up. Happy learning!

[@melquiadesdelgadoramirez680]

I used to work for the instrumentation department at a consultant office, where we designed an offshore gas compression plant within a 4-level plattform. We needed to install Remote I/Os to later connect them to the main PLC. The control system arquitecture included such RIOs spreaded everywhere, linked to the main control system through profinet cables. Definetely, RIOs are the best way to interconnect field instrumentation to main control system. Thanks RealPars for sharing such a valuale information.

[@realpars]

You are very welcome, Melquiades! Thanks a lot for sharing your experiences and knowledge with us.

[@shivam5331]

Thank you, I wish god give more power to you for educating people

[@sameersalem1827]

as always, another great work. thank you all realpars team ❤️

[@realpars]

Thanks for your support, Sameer!

[@nightking9615]

I love you REALPARS Team, you are AWESOME 👍❤👍!

[@realpars]

Thanks a lot, Sultan!

[@beqeb5700]

wow this video covered all questions that appeared in my mind. Great job, Realpars team !

[@realpars]

Our pleasure! Happy to hear that.

[@ulf8468]

Great introduction. A video about the differences of the base units would be interessting too.

[@realpars]

Hey! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@james77011]

this is an amazing video... make me want to study PLCs even more

[@realpars]

Amazing to hear that, James! We have a whole course library (400+) full of video courses. You might want to have a browse around as I am sure this is of your interest. bit.ly/30AVJaR Just to let you know, that we also have a free course on PLC Hardware bit.ly/2XnnUrF Happy learning!

[@athilaldurry5880]

Many thanks for this wonderful videos

[@realpars]

You are very welcome!

[@Qasemzarei]

simpliy explained✨, Thanks Real Pars! I should mention the source voltage +24 and -24 make 48V, which technically should be correctet to +24V and 0. Thankx

[@realpars]

Thank you, Qasem!

[@vibhasingh4842]

Thanks RealPars for sharing this it's really helpful! Can u plz update the video what exactly is difference between ET200S, ET200SP, ET200M modules & when one is to be opted. It would be very helpful!

[@realpars]

Hi Vibha, Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@amankumarshrivastava2380]

Love this.. specially it's animation & mobile favourable layout

[@realpars]

Happy to hear that! Thanks for sharing!

[@قصيعليعبدالهادي]

Absolutely amazing, thank you

[@realpars]

Glad you enjoyed it!

[@osamanasher2550]

Dears, I like this vidio too much I need clarification for two points 1 - based on given cpu information Is there limit to connect no of remote I / O.? 2 - for given nos of rote I / O and plcs in different locations how can decide following issues :- Switch specifications, Server specifications and data warehouse specification based on phenomena that I will save whole Data in database for further analysis Thank you in advance for your support and clarifications Warm regards

[@realpars]

Yes, different CPU models allow for differing number of racks/IO cards/IO points. For your CPU, download the CPU documentation from Siemens. For example, the technical specs for an S7-1214C can be found here: support.industry.siemens.com/cs/pd/255094?pdti=td&dl=en&lc=en-WW. The process image table and output image tables are each 1024 bits (1 kB), so this CPU can have up to 1024 inputs and 1024 outputs. There are limitations to the numbers of nodes that are connected (16 for this CPU, so there are limits for each type of remote I/O node that may limit the total number of I/O available. The only limitation connecting switches, servers, PLCs via Profinet is the cable lengths (

[@andregrobler4393]

Thanks, Very good explanation.

[@realpars]

Glad you liked it!

[@ahmedmetwally4911]

Simply W0ooooo0o0w thanks very much :) Ahmed from egypt .

[@realpars]

Great to hear that, Ahmed! Happy learning.

[@nazishkhan3348]

Hey.. Thank you for such a nice. Can you please make a small vedio explaining the difference between ET 200S, ET 200SP, ET 200M etc , I mean all the series. Which explains what is difference, where we need?? Can you please make such vedio.

[@realpars]

Hey Nazish! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@mr.sasani]

Very instructive thank you

[@realpars]

Glad it was helpful!

[@MrAmjad0070]

Don't forget to include server module program to the last slot in your configuration. Without it, you will not have successful communication with the device.

[@realpars]

Great addition! Thank you for sharing.

[@hardeepreddy6606]

Good video, can you please make a video on the ring and chain topologies of PLC's

[@realpars]

Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!

[@sabarikrishnan5602]

simple and convenience

[@realpars]

Great! Happy learning.

[@PHEINER123]

Great video. Though check narration around 7:20min. "Light modules feed dark modules to the right." but then "Dark modules receive power from light module to the right." Should it be left?

[@realpars]

Yes. Light-colored modules have power connections and pass power to the right. Dark-colored modules accept power from the left.

[@gurdeepsingh9846]

Sir, kindly upload video regarding Et 200sp TM Posinput 1 module card..

[@realpars]

Thank you for sharing your topic suggestion!

[@강원-z6m]

A billion thank u for making this video. I'll keeping touch ur channel~

[@realpars]

You are very welcome!

[@pranaychauli233]

Your generosity is at extreme level. Lots of thanks.. can I get some assistance on ABB 800xa compact control builder online editing

[@abdelrahmangomaaabbady]

Great work, very helpful thanks very match

[@realpars]

You're very welcome - Abdelrahman!

[@bensenoussitahri1327]

Great and informative video, can you make a videos about the control of the stepper motor modules and servo drive?, specially b&r

[@realpars]

Thanks for your kind support! I will happily go ahead and forward your topic suggestion to our course developers for possible future video courses. Thank you for sharing, and happy learning!

[@MuhammadUmar-el1ff]

Superb, outstanding work......

[@realpars]

Thank you, Muhammad!

[@MuhammadUmar-el1ff]

If possible plz make some videos on delta plc also....

[@IK-qu9hw]

Very helpful video. On one white power module how many input output modules can be connected??

[@realpars]

The answer is as many modules as you can add (up to 32 for an ET200SP interface module or 64 for an ET200SP CPU module) and not deplete the power supply. Each module type requires a different amount of current to operate. You would want to add a power module if you need to isolate circuits or use different voltages for the I/O cards (as in separation 24VDC I/O from 120VAC I/O).

[@IK-qu9hw]

@@realpars ok so depends on current capacity. Thank you so much for your reply.

[@shapourjalilyan3356]

Thanks for your video real pars

[@realpars]

You are very welcome, Shapour!

Thanks very much, it's very useful.

[@realpars]

Great! You are very welcome.

[@tarekmohsen7572]

Thank you

[@realpars]

You're very welcome!

[@alibilgin9758]

clear description

[@realpars]

Great to hear that, Ali!

[@morningstar8954]

Thank you so mush

[@realpars]

You're welcome!

[@vissusadhh7787]

Excellent sir

[@realpars]

Thank you!

[@AashishBharat]

Absolutely helpful. I love the animation

[@realpars]

Great compliment, thanks a lot!

[@_Iokanaan_Marusidze_]

Thanks 👍

[@realpars]

You're very welcome!

[@aymendaly7888]

Informative video thank you

[@realpars]

You are very welcome, Aymen!

[@southyouths1204]

@realpars team great work Kindly post video how to configure the ET200SP With CPU.

[@realpars]

Hey! Thanks a lot for your support, great to hear that! I will forward your topic suggestion to our creator team. Thanks for sharing!

[@souvikbanerjee9247]

Thanks a lot for the demonstration. Max.how many cards (B0)can be connected at right side with A0?

[@realpars]

It depends on the power requirements of the B0 units. Most A0 base units can pass no more than 10A to the cards on the right.

[@kamakshiprasanth508]

thanks for uploading this video. can you make a video on Dnp3 protocol. please..

[@realpars]

Hey Kamakshi! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@cheloufiyahia5123]

Good information, thanks a lot

[@realpars]

You are very welcome!

[@prataps2341]

Do we have to download any kind of program into the head module or remote I/O unit? How this remote I/O module is instructed to send and receive data from the main controller?

[@realpars]

No. When you add the ET200SP to the hardware configuration from the hardware catalog, the GSD file for the rack is added to the project. This file tells the CPU how to interpret the data string that is returned from the ET200SP and how to format the commands the CPU sends to the remote I/O head module.

[@bilaliqbal8291]

Your videos are nice bro!!! Plz make video on DeltaV Dcs.....

[@realpars]

Thank you, Bilal! I will forward your topic suggestion to our creator team. Happy learning!

[@danishsaleem6402]

W8ing for your video.. And here it is.., ♥️

[@realpars]

Happy learning!

[@tkwhitey488]

I ordered and tried to install a new replacement 4wire engine speed sensor AI module - Siemans6ES7 1344GB62-0AB0. The key on the back of the replacement AI module faces at 7oclock, where as the old one faces at 4 oclock. Therefore the base plate will not except the new AI due to the key direction. How can I make this compatible? Is the key direction on the base plate interchangeable? Thanks.

[@Rooth9056]

good job thank you for this video

[@realpars]

Thank you, Zouhair!

[@gadoragadoraa4774]

1000 thanks

[@quidao663]

Thank you so much!

[@abinashbhuyan7535]

Can we connect an instrument on the light colored base unit??

[@realpars]

Sure, just place an Analog Input card on the first (light-colored) base unit. The difference in the base units is only in how power is distributed between the modules. Each type of base can take any of the I/O card types.

[@amrouche.abdesselam]

Very nice video !

[@realpars]

Thank you!

[@vishnuganga223]

Did this remote iI/O need extra enclosure to mount?

[@realpars]

ET200SP hardware is rated as IP20, so it will require a panel enclosure in any wet or humid environment.

[@تكلمبالعربية_وهران]

Many thanks

[@realpars]

You are very welcome, Abdo!

[@Yosuke94]

Great vid, but why sensor was plugged to the DQ? :C

[@realpars]

Good catch. The DQ module is a digital output module, to which actuators or other output devices, such as relays, are wired.

[@yehtutnaung7164]

Thanks again.

[@realpars]

You are very welcome!

[@DemetriusHazardus]

Cool!

[@AllenCong]

how about et200sp im155-6mf hf, I didn't find it in the library.

[@realpars]

Hi there, Thank you for your question! You can find more about the Siemens IM155 here: support.industry.siemens.com/cs/start?lc=en-GB Happy learning!

[@vatsalthaker2122]

Hello can any one tell how many dark colour base unit get energized from one light colour unit

[@realpars]

Hi Vatsal, That would make for a great new video course! Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!

[@bartoszri]

When I should use a power module attached to BU ? [6ES7138-4CA01-0AA0]

[@realpars]

The power module (6ES7138-4CA01-0AA0) has been phased out. It was used in the ET200S product line, which has been replaced by ET200SP, as shown in this video. There is one power module available for the ET200SP (6ES7136-6PA00-0BC0) which is used only if a fail-safe power supply with diagnostics is required.

[@90sSathya]

The head module called as interface modules

[@mohamedabdulla6483]

Waiting for your VFD third part video Can you please upload a VFD parameter setting video

[@realpars]

Thanks, Mohamed, I will forward your request to our creator team. Happy learning!

[@eliekhananya1551]

@@realpars this is a much needed video, thanks!

[@ThuanAutomation]

It very helpful.

[@realpars]

Great to hear that, Thuan!

[@ThuanAutomation]

@@realpars thank you

[@EhsanVazirinahad]

Thanks for the great content. It's always enjoyable to learn from your channel. Just a quick question: By connecting the dark base unit to the light one, do we create a 24VDC power supply on the last row of the dark base unit terminal (red and blue pins)? Is it possible to use them as a power supply for field devices when necessary?

[@realpars]

Hello Ehsan Vazirinahad, Thank you for your question. Because I don’t know what application you are working on, I am providing for your review and learning two links below from Siemens, which should have all the information you need with your projects. The first link is the ET-200 SP manual, and the second is software in the cloud that Siemens provides for you to create your hardware project for free. You can also download this information to your computer. You might have to create an account with Siemens for free to use their website on some items they allow you to download. Happy learning from RealPars! support.industry.siemens.com/cs/document/59753521/simatic-et-200sp-baseunits?dti=0&lc=en-US www.siemens.com/global/en/products/automation/topic-areas/tia/tia-selection-tool.html

[@EhsanVazirinahad]

@@realpars Thank you for the provided links . Your channel is incredible.I learnt a lot from it. Keep up the fantastic work.

[@charliechimples]

Great vid. Thanks for sharing. 🐵

[@realpars]

You are very welcome!

[@RakeshYadav-sx8js]

Hello sir I follow your all vedios. Pls share one more What is relationship bwn S71200 and ET200S n ET200SP S71500 and ET200S n ET200SP HOW AND WHEN WE USE AND MAKE THE BILL OF MATERIAL WHAT IS INTERFACE AND HOW WE SELECT IT? POWER MODULE TERMINAL MODULE AND ELECTRICAL MODULE.

[@realpars]

Hi Rakesh, Thanks for the topic suggestion, I will definitely go ahead and forward this to our creator team. Happy learning!

[@EternalGitaJourney]

what if we give supply to other base units without knowing any problem?

[@realpars]

Hi Niranjan, Thank you for your question! It all depends on the supply power you are working with and applied to the base units. In this video, we are working with an “AO” base unit and 24 volts DC modules. But with the ET200SP units, you can mix base units of other types side by side (reference the user manual), like 120 VAC main power base unit, and you must provide 120 VAC to that base unit and must be careful not to put the wrong power to the wrong base unit. It’s always better to refer to the design manual link we provide or the Siemens website. As far as we explained in our video, if you applied power to one of the terminals as we showed you, for example, to the input module, you just be turning on an input on that module. If you apply it to an output base unit, you will just be turning on the LED on that module, nothing else. Happy learning from RealPars!

[@EternalGitaJourney]

@@realpars thank you for replying 👍

[@AllenCong]

I want to know that if this et200sp can only be remote io?

[@realpars]

Hi there, Thank you for your question! The ET200 system has been around from Siemens for a long time. And many improvements have been done to these modules. Here is a link you can review for your learning support.industry.siemens.com/cs/start?lc=en-GB Happy learning

[@vissusadhh7787]

Sir would you please make a detail wiring of AI,AO,DI,DO with example

[@realpars]

Hey! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@shubhammatekar1173]

Can you make videos on Communication protocols like- Foundation Fieldbus, HART, Profibus ?

[@realpars]

Hi Shubham, Thanks for sharing your suggestion with us! I have sent this over to our course developers. Happy learning!

[@2574400]

Can you make videos on Siemens smc 20/30/120 and NCU unit

[@realpars]

Hey Hitanshu! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@Maxxwellification]

Good Video! Can I use the ET200 also completely standalone? Just in terms of functionality do I have any disadvantages compared to a 1500?

[@realpars]

The ET200SP family of I/O can be used ins a standalone I/O rack, but a separate PLC CPU unit, like an S7-1500 or S7-300 series PLC is still required. The S7-1500 can be used with an integrated ET200MP series I/O subsystem or, with a Profinet or Profibus-DP link, the ET200SP I/O subsystem can be used as a remote I/O solution.

[@IK-qu9hw]

On one white power module how many input output modules can be connected??

[@discutiibiblice]

lmao, no. ET200 is not a PLC, it's just a Bus Collector. You still need a PLC.

[@ikramantaki]

Hi, nice video just like always. What about a SINAMICS course???

[@realpars]

Hi Rulo, Thanks for your support! Happy to hear that you enjoyed this course video. I will definitely go ahead and forward your suggestion to our creator team. Thanks for sharing that with us. Happy learning!

[@bramvandenbempt6914]

should you be using cable shoes with these terminals or is it better to use bare wire ?

[@realpars]

I like to use wire ferrules (cable shoes) at the ends of stranded wire. That keeps the installation neat and makes it easier to insert the wires into the terminals.

[@rhythmandacoustics]

Too bad we don't have this. I have pull so much wires, I have lost count. So much field devices.

[@BetterMan_Z]

Hi friend I want read the logic, how to do it, use TIA portal V15 and ethernet cable?

[@realpars]

If you have an S7-1200 PLC, then TIA Portal Basic on a PC, a small network switch, and an ethernet cable is all you need. If you have another S7 PLC model, you will need TIA Portal Professional. If you do not have a PLC, you can build programs and test them with the built-in simulator in any version of TIA Portal.

[@BetterMan_Z]

@@realpars ok

[@yugagomase2418]

Please provide video on 800XA ABB system.Please

[@realpars]

Hey Yuga! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!

[@sebenzilemoloi259]

Can you use profibus for comms on the ET200SP or is it only profinet?

[@realpars]

Yes, there is an option for a ProfibusDP communication module. Other fieldbuses are also an option.

[@fetimisme6873]

merciiiiiiiiiiiiiiiiiiiiiiiii

[@realpars]

Our pleasure!

[@Mltnzle]

can this I/O module be used only with S7 1500? oder is it also possible with S7 1200?

[@realpars]

Thank you for your inquiry. Indeed, it is possible. Siemens introduced this functionality in version 12, approximately a decade ago. With the latest version, 1200, you have even more capabilities at your disposal. I suggest visiting the Siemens support website to explore the full range of features. Note that in some instances, you may need to register before downloading. support.industry.siemens.com/cs/start?lc=en-US Happy learning!

[@Mltnzle]

@realpars thank you for detailed answer

[@prashantthapa276]

How many no's IO modules can be connected with one power module?

[@realpars]

You add modules up to the point where the modules use all available power from the power module. Each type of I/O module requires a different amount of power. Typically, this is 12 - 15 modules.

[@faezsobry5132]

Hi.. Thank you for the video explanation. But i have some concern on the architecture of connecting S71500 an ET200SP. Since all the I/O devices are connected to the ET200SP, all the programs should be done on the ET200SP right? Then why do we still need the S71500??

[@realpars]

It depends on the model of the ET200SP system you purchase. There are ET200SP models that include an IM module and can be a Profibus slave node to an S7-1500 or connect to an S7-1500 Profinet master. An example would be an IM 155-6 PN BA, which supplies a typical remote I/O interface using ET200SP modules. There is also a line of ET20)SP CPU"s, which can be programmed as stand-alone PLC and I/O, combined onto the same ET200SP backplane. ET200SP CPU's have small amounts of program memory (150kb - 750kB) as compared to a larger S7-1500 The ET200SP is essentially a smaller and less expensive S7-1500. A typical model number for an ET200SP CPU si S7-1510SP-1 PN.

[@aqx1729]

Best video😍

[@realpars]

Thank you!

[@hasithasudasinghe7207]

Et200sp to s7-1200 what is the maximum ethernet distance?

[@realpars]

Profinet over CAT5E cable = max. length is 80-100 meters, For fiber optic cable, the maximum length is 26 km. For wireless, the maximum is approx. 100 meters.

[@stalinsubbiah3238]

What is the full form of ET200, ET300

[@realpars]

Thank you for your question. To the best of my knowledge, Siemens does not have an ET300. They produced the S7-300 CPUs years ago and supported them for an additional 10 years. However, this product line has been or will be discontinued. Siemens does continue to make and support the ET200 line, which has been around for approximately 30 years. Here is a link to help you learn more about Siemens PLC products. If you have any further questions, please feel free to ask. support.industry.siemens.com/cs/document/109744173/documentation-for-simatic-controller?dti=0&lc=en-WW Happy learning!

[@sahilrockstar2008]

Hi.currently we are using ET 200 SP 4ch, 2A, DO card (18nos.) With Profinet IM module. Everything is working fine the only problem is the heating. When all DOs are turn ON the PLC temperature I checked was 45 to 48 deg. C. Is this a normal? Because even with this temperature my operation is working fine. Load on each module is also less than 5A.

[@realpars]

I have heard of this happening before. There may be a number of causes. Is this ET200SP rack in a closed panel? You may need to ventilate or provide internal panel cooling, especially if the power supply feeding the output circuits is also in the panel. I may also be a grounding issue, as electrical noise can be dissipated as heat. Try grounding the DIN rail on which the ET200SP is mounted, and make sure the power supply is properly grounded. Also, insure that there is at least 20mm clearance above and below the ET200SP rack and at least 10mm on each side. Lastly, ensure the power wires to the CPU are at least 14AWG and that there are no loose connections.

[@sahilrockstar2008]

@@realpars Thank you for your prompt reply. we kept PLC in close panel with Power supply. actually we are supplying IP65 rated panel due to this fans are not provided for ventilation. 45mm empty space we maintain above and below PLC. Earthing we checked it was 0.85ohm. One more question we saw some residual voltage(6.9V) at the DO card when DO was not forced is because PNP?

[@Mr.JayantaJi]

I have one question why you not use any PM(power module)?

[@realpars]

The power supply is part of the head module. Power wiring is connected at the lower left of the head module. A separate power module is not required.

[@bratnaji196]

Thank for the vedio.. How many darkcolored module can be powered up by using single light color module??

[@realpars]

Twelve (12) to the right of the light-colored module.

[@bratnaji196]

@@realparsThank you for answer. is that include Digital I/O and analoge I/Os

[@yassinal-nuaimee1204]

great video thanks a lot! How did you make the schematics tho?

[@realpars]

Hi there, Thanks for your comment, regarding your question - I am actually not sure about that, as that is something created by our Graphic and Animation department.

[@ilyadeykin3915]

Those little round things at the base units. What are they for? Some kind of lock?..

[@realpars]

Yes, those are spring-lock wire connectors. The other type of wire connectors are screw-type. On the base unit, the wiring connections are used for the power connections (24VDC power).

[@ilyadeykin3915]

@@realpars Greatly thanks you for your answer.

[@SebastianVJ]

Can you please tell what is the difference between the two ports 1L+and 2L+ in this CPU power supply?

[@realpars]

These ports allow for 2 separate 24VDC circuits to be wired. 1L+ and 2L+ are both 24VDC sources, so one circuit can be formed with 1L+ (24VDC+) and common, and the second circuit can be formed with 2L+ (also 24VDC+) and common.

[@bahurudeen7147]

Please sir upload the video for new HMI input output installation

[@realpars]

Thansk for the topic suggestion! I will go ahead and forward this to our creator team.

[@skripsidcs7671]

question. i'm currently working with this ET200SP and i've found a problem, once the digital output is activated it should be just showing a DC voltage, but its not. i dont know why the output also contain an AC voltage, amount is 6 to 9 V AC in measurement .. can someone help me with that?

[@realpars]

It appears that you have mixed DC and AC cards in the same power section. Whatever voltage/power source you are using to power a light-colored (Type A0) base unit, that same voltage will flow to each dark-colored unit to the right. If another Type A0 unit is installed, it creates another power zone with the voltage connected. This allows DC and AC modules to be located on the same rack. But be careful not to mix DC and AC cards in the same section or power DC cards with AC voltage or vice versa.

[@JuanRodriguez-pv1ym]

Very good content, thanks for the video!!

[@realpars]

Happy to hear that, Juan!

[@HuyBom9010]

I have a problem I need help I am connecting modbus RTU with ET200SP of S7 1500 I use 3 ET200SP stations, each station has 1 Modbus RTU module PtP 6ES7 137-6AA01-0BA0 to connect up to 10 Flowmeters I declare 3 MBCommLoad functions to declare the connection port for each Modbus module, but in the program, it does not run. And if I only use 1 MBCommLoad function for 1 Modbus module, the connection is OK. I hope you can help me with the solution so that I can use all 3 modbus RTU modules. Thank you so much

[@realpars]

The module you are using is a Point-to-Point module. A single module can support polling only 1 device at a time. You will need to set up your MBCommLoad functions such that once a device is polled, no others are polled until you detect that the first device is done. Then the second device can be polled, and so on.

[@HuyBom9010]

@@realpars Thank you so much, i did it very well. I use function block with MB_ComLoad and MB_Master instance.

[@calvinceogara2088]

Hi, Can the dp et 200m be configured with i/o and then programmed without using cpu?

[@realpars]

You can configure the entire system offline including ET200 and the DP network. However, in order to download the configuration, you will need the CPU installed. The ET200M gets is commands from the CPU and you will not be able to monitor I/O without the CPU in place. This is because a DP network requires a master node, which is always the CPU.

[@SantoshPratyangra]

Awesome

[@realpars]

Thank you!