Micrologix 1400: How to change channel mode?

[asteroidehk 1]

Hello friends I am trying to read/write to a display, I have done this in Micrologix 1500. Now, I need to do in ML1400 through RS485, but AWT instruction is not working. According to some info that I have read, I need to change channel mode to user. "Channel Mode S:33/3 When clear (0), the channel 0 communication port is in the User mode (ASCII mode). Whe set (1), channel 0 is in the System mode (DF1 mode). Make this selection on the Channel Configuration dialog box. To access this dialog box double-click on Channel Configuration in the project tree." I have tried what help says, but is not possible. I am attaching pics and the program. How can I change the channel mode? Thanks in advance. ML1400_CHAN0.RSS