Coherent enough to listen and understand, not able to verbally respond. Not about to rampage, but not in control enough to be functionally mobile despite being capable of movement.

Since V is more responsive to M-Bot than himself (and really, Serph just isn't comfortable with chattering away...) he says to the bot, "V's attention must be drawn away. They need something to focus on." It might sound a little odd, but... "Can you sing?"

Or play a recording of some kind of song?