Siemens S7 300 and STEP 7 PLC program using SIMATIC Software
https://instrumentationtools.blogspot.com/2015/07/Siemens-S7-300-and-Step-7-PLC-Program.html
Siemens S7 300 and STEP 7 PLC program using SIMATIC Procedure:
1.Open SIMATIC Manager.
SIMATIC Manager is a program which manages subprograms of STEP 7.
2.To start our programming first we need to create a new project by
clicking on the "new" icon on the toolbar to open the "new project"
window.
In this window we enter a name for our project in the "name"
field.The path to our saved project is shown in the "storage
location."
However we can use the browse button to navigate to a
different location other than the default.
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| Siemens S7 300 Program |
3.After creating the project we click on its name to highlight it.then from the "insert" menu we select one of these "stations"dependent upon the control system that we intend to use.
4.After selecting "Station 300" we see that a subgroup named “SIMATIC 300” has been added to our project.
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| STEP 7 PLC program |
5.Next we click on this "hardware" icon which takes us to the hardware
so that we can configure the modules we need for the PLC.Our PLC is an
“S7 300" so we need to select the relevant modules from “SIMATIC 300”
subgroup here.
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| SIMATIC Software |
6.First of all we need a rack into which we will mount the modules.To
insert the rack, open the "rack 300" and double click on the “rail” to
add it to the left window.As you can see this rack has 11 slots.
7.We need to install a “power supply” in the first slot to power our
PLC modules and turn them on.To do this we open this “PS 300” folder and
double click on this two-ampere power supply to insert it into the
first slot of the rack
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| S7 300 PLC Programming |
8.In the second slot of the rack we always insert the "CPU" module.To
select the desired module we open this "CPU 300" folder, which opens to
show us all types of "300 CPUs."
We want to select a “316 CPU”, so we
need to open this "CPU 316" folder and click on the relevant part number
to insert it into the second slot in the rack.We can add rest of the
modules in similar way.
9.The addresses of the digital input module range from byte zero to
byte number one means that the addresses we can use in this module for
our program start at “I 0.0”for the first input and continue through
to“I 1.7” for the last input.Similarly you can see the addresses of our
digital output module range from byte number 4 through to byte number 5
so there are 16 addresses that we can use for this module starting at “Q
4.0” continuing through to “Q 5.7. Finish the configuration and download
it to PLC
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| STEP 7 PLC program using SIMATIC Software |
10.Before downloading Click on save and compile icon to save it.then we
click on this download icon.This brings up a window where we need to
select the CPU to which we want to download the configuration and then
click "OK".
In the next window click on "view" and then select the
appropriate "MPI" address, and after clicking "OK" the configuration
will download to the CPU.
Now, having completed the configuration we
can check the project tree and see that a subgroup with the same name as
the CPU has been added there.
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| PLC Programming using Siemens S7 |
11.Now we can write our program in a block named "OB 1"We can find the "OB 1" by opening the "S7 Program" folder and looking in the "block"folder.
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| Siemens S7 300 Application |
12.open the "OB 1" by double clicking on it; as it's the first time we
have opened it this "properties" window opens.We simply OK the window to
get into the programming environment.
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| Siemens PLC S7 300 Logic |
13.Open symbol table from option menu to give a representative name for each I/O and save symbol table.
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| Siemens PLC S7 300 Screenshot |
14.Make the PLC program as per project requirement.
15.Click on Download button to download the program in to PLC.
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