What are the differences between SIMATIC S7-300 and S7-1500 PLCs?

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Today you will be learning about the differences between the Siemens S7-300 and S7-1500 Advanced series PLCs.

For both systems, a wide range of modules can be used according to the task at hand and a cost-effective stock of spare parts are readily available.

Released in 2012, the SIMATIC S7-1500 is the successor of the longstanding S7-300 PLC.

Although they are interchangeable in many situations, the S7-1500 generation integrates the latest and future-proof technologies into an automation system with enhanced system features over the S7-300.

With the engineering system TIA Portal, the common engineering platform for all SIMATIC controllers, the SIMATIC S7-1500 is designed for fast market changes, constantly shorter product life cycles, and increasing cost pressures.

Both the S7-300 and S7-1500 PLCs are similar in shape and size and are built around a modular, expandable design. CPUs, I/O modules and communication modules may be added as needed to a standard backplane that can be sized to fit your specific project.

Up to 32 expansion modules can be installed with both systems, requiring only a DIN rail mount and backplane.

The S7-1500 has a standard built-in display and keypad that allows for basic configuration and diagnostics without the need for an external screen.

Both the S7-300 and S7-1500 series PLCs have many different configuration options that allow the optimal CPU to be selected depending on the application. Both platforms provide several CPU categories including:

- Standard (for typical applications)
- Compact (for applications where space and cost is a concern)
- Fail-Safe (for fail-safe applications)

The S7-1500 significantly increases performance over the S7-300 with a faster backplane bus, standard PROFINET interface, and shorter reaction times.

As a result, the updated PROFINET interface provides greater reproducibility and precision in the microsecond timeframe.

When programming for slower processes this may not make a noticeable difference in the real world, however, it can be very useful in high-speed applications such as assembly lines.

Two Profinet ports come standard on every S7-1500 CPU although you may select additional ports and communication protocols when ordering.

As an added bonus, you are able to configure these ports as a bridge which acts as a mini switch. This can be very convenient when linking devices and interfacing with the PLC in the field.

With S7-300s, the desired number of ports and appropriate communication protocol must be chosen up-front.

Prices between the S7-300 and S7-1500 are very similar between like models. If cost is a major concern, the S7-1500 compact version provides up to 70% cost savings, as well as 25% space savings compared to the standard CPUs, although some features are limited.

There are several main factors to consider when selecting a PLC for your project. These factors are:

- Application size,
- Available space,
- Communications protocols,
- Processing performance.

By using the Siemens website, you can select the appropriate PLC for your specific application. Here is the link to the PLC selection tool of Siemens:

In conclusion, both the S7-300 and S7-1500 PLCs are capable and proven systems, providing modular, cost-effective, and application-specific solutions to fit your needs.

In the future, Siemens will slowly begin to phase out the S7-300 in favor of the S7-1500.

Eventually, the S7-300s will no longer be supported, although that is still many years away. As of now the added benefits of the S7-1500 offered at a price point similar to the S7-300 make it a no-brainer to go with the updated PLC on your next project.

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Check out this link where you can select the right SIMATIC Controller for your application:

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#RealPars #S71500 #S7300

[RicardoCosta-escv]

This channel it's very useful for me !!! TKS guys

[christianadanparedescarden]

I´m so glad to found your channel, it´s amazing!

[yidingji]

This channel is definitely like a "mountain full of treasures". For those who aim to learn engineering automation, go ahead and take a look, strongly recommended!

[ThuanAutomation]

The video is very useful, thanks to you, I know the difference between these 2 types of plc

[melquiadesdelgadoramirez]

Nice video and precise information about both models of PLCs available from Siemens. Thanks Realpars for this useful material.

[Facemix]

Hi guys! Can you create a video explaining the main difference between s7 1200 and s7 1500? It would help a lot! Anyway, you're doing a fantastic job!

[rhythmandacoustics]

That's some fancy stuff you got there!

[samirghedjati]

Thank you realpars team, would you mind make a video about Siemens PLCs evolution? Also DCS? Thank you in advance.

[DrReginaldFinleySr]

That's the How it's Made guy's voice. 🙂 Excellent video. Thank you for sharing.

[mouizimran]

Hi Sir, the video was very beneficial.
Kindly make video lesson on
I/O modules.
1. DI Module, 2. AI Module 3. DO 4. AO
Their working, internal electronic circuitary, terminal details, how to force them, how to wire them
Different AI modules (2 wire, 3 wire, 4 wire)

[rajuhassani]

Add more videos on field instruments, Components of Marshalling cabinet, System Cabinet, Explain the FGS system also

[murugesanpilavilai]

Well said. S7-1500 widely suport the data with out error and speed transmition. Thanks a lot for the post.

[spawnqc]

2:47 Standard, compact (C), fail-safe (F) and you could add technology (T) version. Those have more motion ressources. There is also the new redundant (R) and high availability (H) S7-1500, but R and H doesn't exist in the S7-300 platform. You had to go with S7-400H "in the past".

[nkelectricalautomations]

your videos are great and quite easily understandable .... can you make videos on logosoft comfort v8

[adammustapha]

You are doing a very great job with your content. i have few questions to ask about S7-1214C PLC
1. If an S7-1214 Siemens PLC has several LED indicators that can be used to verify if the
processor is operating correctly and the Maintenance LED is flashing yellow and there is
no memory card. What does this mean?

2. IF An S7-1214 stopped controlling the machine. The STOP/RUN indicator is yellow and
the ERROR LED is red. What’s wrong?

3. A controlLogix 1756 processor has a flashing green I/O LED, ehat does this mean and ehat should you do to troubleshoot?

[zinou]

Please make course about MMS communication protocol

[danliviu]

A video for analog input scale on Step7 simatic manager with STL? Please, or do you have this as a course? Thx

[erickontiveroslara]

Could it be possible to have a series of videos bout AS-i bus?

[ahmedmetwally]

Thanks for you best creative team ever

[selvabalakrishna]

Please make video about closed loop controller and how to program with encoder with HMI traverse fuctions