Hi, 

I’m using the CP 1243-7 LTE-US module (6GK7 243-7SX30-0XE0) with firmware version V3.2. Back in November 2024, I successfully tested SMS sending and receiving using the TSEND and TRECV instructions — everything worked perfectly.

Now, in April 2025, I'm running the same tests, but SMS communication no longer works. I'm located in Chile (Region VIII) and using the Entel mobile network operator.

I’m also working with a CPU 1215C DC/DC/DC (6ES7 215-1AG40-0XB0) with firmware V4.5, all within TIA Portal V17.

Has anyone experienced a similar issue or is aware of any recent updates that might be affecting this functionality?

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Split from CP1243-7 LTE KX30.

Cristian_2019

Hi, 

I’m using the CP 1243-7 LTE-US module (6GK7 243-7SX30-0XE0) with firmware version V3.2. Back in November 2024, I successfully tested SMS sending and receiving using the TSEND and TRECV instructions — everything worked perfectly.

Now, in April 2025, I'm running the same tests, but SMS communication no longer works. I'm located in Chile (Region VIII) and using the Entel mobile network operator.

I’m also working with a CPU 1215C DC/DC/DC (6ES7 215-1AG40-0XB0) with firmware V4.5, all within TIA Portal V17.

Has anyone experienced a similar issue or is aware of any recent updates that might be affecting this functionality?

Please don't post twice for the same problem.

You post your problem also in this topic:

CP 1243-7 LTE-US: SMS communication no longer works

Topic closed because the qestion has been posted twice. The active topic can be found via the link above.

Kind regards, Moderator_Lan