How I can introduce a parametric programm in fagor 102

Good morning.
I want to introduce a program that I got lost in a Fagor 102, which uses parametric programming in the address 700 and when trying to introduce the data it always returns me the fact that had stored in this address. Evidently I should be making something bad and I don't detect the way to make it well. Maybe have some parameter that blocks the writing in this area or the form of publishing this program area it is executing it in an incorrect way.
Do you have some suggestion of like I can program starting from this block?. do you Know about some manual that he/she explains this operation?.
Thank you.
LuisO.