eu tenho um s7 1200 1214 dc/dc/dc PLC e um ktp 40 HMI.

gostaria de limitar o valor que posso inserir em ihm. temperatura máxima: 0~250 (que não pode inserir 251)

projetocm - Google translate

i have a s7 1200 1214c dc/dc/dc PLC and a ktp 400 HMI.I would like to limit the value I can enter in hmi.Max temperature: 0~250 (which cannot enter 251)

 Welcome to the forum. This is an international group of people, and our common language is English, so please use it.

You can sen the HMI tag's maximum limit to 250 and minimum to 0, then operator can not change over those limits.

how to do this?

Hello projetocm,

Look on this :https://www.youtube.com/watch?v=vTqkx_nYjeQ&t=483s

Best regards. 

projetocm

obrigado mas... preciso ,em um campo como este

 Please, try to use English.

You can set the MIN and MAX limits in the HMI tag properties.

If you don't whant create limits in HMI you can do in PLC also

Example if your tempereture ranges must be 0-250 so if in HMI entered like 251 then in PLC do intruction

if HMI tag greater then 250 then do move function to HMI tag 250 value and like this you never you can set more then 250 value becouse PLC program rewrite your value to maximum