Hi Everyone,

I'm currently working with an S7-1200 CPU 1214C DC/DC/DC, and I'm using a WAGO Profinet Coupler 750-375 to communicate with the PLC. However, when I try to download the program to the CPU, I encounter the attached error, which is preventing the download process from completing.

Any guidance would be appreciated!

Hello Mehakkk,

If text list memory consumption reaches the memory limit, download is not possible and the S7-1200 PLCs have a limit of 1MB. Using GSD devices can lead to the usage of additional system text lists and because of this the 1MB limit is exceeded.

The following steps could help with the download:

1. Click on the CPU and trigger a change device

2. Select a older Firmware version 4.0 or 4.1

3. Download the configuration

4. Trigger a change device and select the firmware version you had before

   => now the download is possible

Another workaround could be to set the language mapping to “None” for all PLC languages at the Multilingual support of PLC properties (see attached).

One drawback of this workaround is, that In this case TextContainer will not be downloaded at all. That means that system text lists will not be resolvable, so diagnostic messages cannot be displayed correctly at web server and other clients (e.g. WinCC Unified Panels), but will be visible at TIA Portal (e.g. Diagnostic Buffer)

JBS98

Hello Mehakkk,

If text list memory consumption reaches the memory limit, download is not possible and the S7-1200 PLCs have a limit of 1MB. Using GSD devices can lead to the usage of additional system text lists and because of this the 1MB limit is exceeded.

The following steps could help with the download:

1. Click on the CPU and trigger a change device

2. Select a older Firmware version 4.0 or 4.1

3. Download the configuration

4. Trigger a change device and select the firmware version you had before

   => now the download is possible

Note about memory consumption and PLC languages:

• System Diagnostic messages needs ~300 kB for each PLC languages (+ 60 kB language independent texts)

• Activating 3 PLC languages needs almost 1 Mega, which is the limit

So depending on the selected languages:

• Empty project with 2 PLC languages -> requires 700 kB

• Empty project with 3 (current max supported) PLC languages -> requires 1000 kB

So please check the PLC languages and if possible select only one or two.

Another workaround could be to set the language mapping to “None” for all PLC languages at the Multilingual support of PLC properties (see attached).

One drawback of this workaround is, that In this case TextContainer will not be downloaded at all. That means that system text lists will not be resolvable, so diagnostic messages cannot be displayed correctly at web server and other clients (e.g. WinCC Unified Panels), but will be visible at TIA Portal (e.g. Diagnostic Buffer)

 Thank You for answering my query. This solution works but I want to know if I want to display the diagnostic messages at web server and other clients ( WinCC unified panel) what will I need to do?

Mehakkk

Thank You for answering my query. This solution works but I want to know if I want to display the diagnostic messages at web server and other clients ( WinCC unified panel) what will I need to do?

 To display the diagnostic buffer of a PLC in a Unified panel, you can do so with the "system diagnostics control" element: Configuring system diagnostics of the controller (S7-1200/1500)

As for the web server, you have the possibility of viewing the diagnostic buffer of a PLC without any problem. You can see it explained in point "3.1.3 Diagnostics via the web server" of the document at the following link: Diagnostics Overview for SIMATIC S7-1200 and S7-1500