Dear Members

I want to use S7 1200 series PLC for a project having more I/Os than the CPU series can handle. Could you suggest me a combination using S7 1200 CPUs in Master/Slave mode? A sample project or an illustration would be highly appreciated

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Split from Configure S7-1200 more than 8 I/O Module in TIA Portal.

vinit

Is there any limitation on no of IM stations and module per station?

 hi vinit,

You can find this kind of information in the technical data of your CPU:

 for Example:

6ES7214-1AG40-0XB0

technical data of 6ES7214-1AG40-0XB0

Hardware configuration

-Number of modules per system, max.3 comm. modules, 1 signal board, 8 signal modules

...

— Number of connectable IO Devices, max.16

 hope this helps,

regards,

vinit

IO device is refereed here as interface modules? 

 yes, correct.

An interface-module, like IM151-3 or IM155-6, connected over Profinet, is an IO-Device for the S7-1200 as IO-controller.

regards,

Thanks mops04 for clearing my doubt. I can see in data sheet that the image area for input is 1kbyte and output is 1kByte. Is that means that this is maximum I/O a CPU can  work with? 

vinit

Thanks mops04 for clearing my doubt. I can see in data sheet that the image area for input is 1kbyte and output is 1kByte. Is that means that this is maximum I/O a CPU can  work with? 

Address area
Process image
● Inputs, adjustable	1 kbyte
● Outputs, adjustable	1 kbyte

 hi,

yes, S7-1200 CPUs have an addressarea of 1kbyte which is completely in the process-image.

An overview of the S7-1200 models you find in the s7-1200 system-manual, chapter 1:

SIMATIC S7 S7-1200 Programmable controller

hope this helps,

regards,

i have a confusion, please let me know if i am wrong or right. I have read the manual, process image area for input and output is 1kbyte i.e. 1024 Bytes. Does this means the CPU can have 1028/8=128 digital and 1024/8=128 digital output cards.

Or 

We can define from 0-128 as input and output address.