Hello VECKT,
Are you saying that Alarm 20 is a RAM ERROR? I can assure you that, in the context of your Post #8, Alarm 20 is as I stated in my previous Post; please see the attached picture which is a screen shot of an extract from an MX3 Manual. On the basis of that, it would seem that your control is NOT equipped with the User Macro function. To go forward, you should confirm if your machine has, or has not, the User Macro function. One method of doing this is to see if a Macro Variable Page can be displayed.
It is difficult to give you the support you seek if you don't answer the questions put to you.
Regards,
Bill