Siemens S7-1200 Introduction to PLC Hardware

you hello guys welcome to NFI online video tutorials my name is Raj weed I'm one of the educator in a5 now in this video we are going to learn about introduction to PLC we are using a PLC named Siemens x7 1200 with the CPU one-to-one to see ACDC relay and in this layout of videos we are going to understand the PLC hardware we will see how the processor works and we will void the inputs and outputs will understand the basic fundamentals how to wire this feeling and then we'll have a summary so I'm using a PLC s7 1200 along with this tutorials which you can see on my table over here so this is my PLC which is powered up and using this BNC on my desk I will explain you various things how to work with this PLC alright so let's start the first lesson is understanding PLC hardware so that's the same PLC we have on the table s7 1200 so let's see what are the various elements and thus PLC so we'll start with or supply one twenty two twenty a see now this bar supply of the speed Z has to be provided with 120 or 220 AC from your power source now you may find some plc in which we supply 24 volts but this one is AC input voltage okay now why because this PUC has an internal power supply inside so if I show you if I show you this one this BNC if you see this part this part of the PLC is the power supply so this part can watch the AC into DC so you don't have to use any external power supply in this case you can use you can directly provide AC voltage to this PLC okay so you must take care of that because if your P if your BNC is DC source if your PC's written 24 volts and you if you provide AC source it will burn out immediately so you have to check that but what is the power supply rating of your PLC okay so this is provided over here so in my in my PLC you can see some wires this is the wire this is coming out from my power source and this is giving me line and neutral off 220 AC so we'll see it's more in the next slide now next we have digital inputs now you know that plc is a digital controller which converts your input signals and process that using your algorithms and it will give you some outputs so digital inputs are connected to this part of the PLC okay so this PLC supports now that's the model number thus PLC supports eight digital inputs and these additional inputs is of 24 volts and you have to supply it here and correspondingly you will find some indicators now these indicators will tell you which input is on or off so we have some green lights here which will indicate the input is on if there is no green light it means input is off so I can show you by having a look at this B and C now this is my input simulator if I turn on the input you can see that if I turn on this button it shows my third input is on hey this is how our input is indicated on this indicator if I turn on another input it will show my first input is on so this is connected to my inputs so how to wire this input that will come later in the lesson this is just to understand that we have an indicators here which will tell you about the status of the inputs okay next we have digital outputs and it says six number of outputs relay type now relay is a coil which has some compare ratings so there are two types of PLC outputs one is transistor type generally it's two types one is a relay type so relay type has more current or current capability than from the statites so we have relay types output here we have six outputs okay and then we have digital output indicators here so similarly the way we have seen the LEDs for inputs we can have an LED four outputs I could have shown you that but my peers he doesn't have any logic inside but in later lesson you will see how you can see the status of your output on these LEDs so if you are turning on let's say a lamp or a solenoid or a motor even you can see their status on the PLC instead of visualizing them at a physical level you can see their status on the PLC as well okay then we have B and C status in Decatur's now status indicator means whether the PLC is running or is it stopped or is it at some error status or is it as some maintenance mode so this is a status indicator so currently if you see this BNC it shows my first LEDs on which is my run LED so BNC is that run mode at run mode it will start executing the logic and it will give you the output okay so this is a typical layout of a PLC we have multiplied inputs indicators outputs indicators and status indicators so as mentioned we have different status run stop error and maintenance okay so let's proceed this is a zoom layout of your inputs so starting with this if you see here Porsche apply this is l1 + n if you see this symbol this arrow goes downwards now this means you have to supply the power okay it's mentioned 1:22 for 2 240v AC maybe supply AC volt is inside it and this extent is the lace the dedicated number for these 3 terminals this is the symbol for our thing now if you see these two terminals it says L plus and M and this arrows going outwards this is the DC output which is 24 VDC we will get 24 voltage output from this device remember that you should not have to provide 24 from the parts of mag it will give you 24 volts ok we can use this one for volt for wiring our inputs which we will see that in the later slides then you have these terminals 8 terminals for your digital inputs to connect your digital inputs then you have analog input as well so this PNC supposed to analog inputs 1 is at 0 and 1 okay so it has two analog inputs and what other resolution we'll see that in the later slides then you have a memory card slot memory card slot is to store some information of your let's say if you are recording some values in your PNC program and you want to store that value and later you want to read that value you can keep storing that value in the memory card this will help you to have a record of your process alright then we have outputs this is the output terminals of the plc cutting red communication status indicator now if we see here it says link and Rx and TX so if your PLC is connected to some let's say an HMI or some other device which supports rs-485 or Ethernet communication this LED will show you the stays okay so does the status to mean to ensure the communication is perfectly fine or not then you have a LAN interface so this is one of the best feature of a seven 1200 that you have in LAN interface so you can program your PLC with a standard LAN cable you do not need any any other programming cable unlike s7 to two hundred or micro logics 1000 which does not support LAN so those PLC supports LAN so you can use your standard LAN cable to program the PLC which is very easily available in the market as well so this is a MAC address of your PLC then you have these relay outputs as mentioned before so you have six relays output which you can connect to these terminals okay you you

Channel: Rajvir Singh

Views: 103,079

Keywords: PLC Tutorials, PLC Training, PLC Simulator, PLC Projects, PLC Lessons, PLC Lectures, Siemens S7 1200, Siemens PLC Tutorial, Siemens Hardware, Siemens PLC Introduction

Id: vrb8suLMhwA

Length: 8min 10sec (490 seconds)

Published: Mon Jun 13 2016