How to make data block area retentive ?

Hello,

I'm having the same problem,

In fact, when i am using et200 cpu, such a problem did not occur. All the datablocks were already retentive. When energy went back and forth, the data was not lost. What's the secret? Obviously there are 3 et200sp cpu I expect to commission and it seems impossible to change the cpu for this problem.

I set it to optimized, but the data is lost in startup.

I have 40 data blocks and all of them can change data.

How do I make data block area retentive ?

Yours truly

...sent from App

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Split from Retentive memory area s7-1500 (not enough).

Hello,

For the future:

1. Indicate the order number of the equipment you are working with
2. Indicate the firmware version of the equipment with which you are working

Then we can answer your questions in more detail.

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Look at the picture in the attachment

See the manual below:

SIMATIC S7-1500, S7-1500R/H, SIMATIC Drive Controller, ET 200SP, ET 200pro Structure and Use of the CPU Memory

2.4 Summary of retentive behavior

2.4.1 Retentive behavior of the memory objects

This section gives an overview of the retentive behavior of the memory objects of the CPUs. In addition to the retentive memory areas described, there are other objects with retentive characteristics, for example, the diagnostics buffer. These objects do not occupy any storage space in the retentive memory.

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In a general sense, the retentive area can be configured both in data blocks, and for example in the variables themselves.

For the 1500 family, the settings are the same (but retentive memory area different sizes)

Hello,

I did not find information in the manuals about its increase - I'm sure it is tied to the hardware part of the PLC

See attachment - comparing two PLCs

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If everything is clear to you - and there are no more questions, please - close the topic and put a rating)

thank you for the information.

I think I'm going to go through optimizing data blocks,

identifying what is really necessary.