EMB ERJ 170/175 ER/LR
Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Became Reoriented; Flight Crew Rejected Takeoff
Human Factors
While entering the runway; I confused the TO-1 setting with the flaps 1 setting. I placed the flaps in the 1 position without verify with the Takeoff data; after the before takeoff check list was completed. Once the auto throttles engaged; a master caution sounded 'no takeoff flaps'. The takeoff was rejected. I did not verify a flap change with the takeoff data. Always; Always verify any changes with the takeoff data.
EMB-175 First Officer reports confusing the TO-1 setting [a thrust setting] with the flaps 1 setting. This results in a takeoff warning when autothrust is engaged and the takeoff is rejected.