Systems and methods of initiating a power shutdown mode for a surgical instrument

A surgical instrument comprising:

• an end effector pivotable from an articulation home position;
• a knife bar movable from a knife home position;
• and
• a control circuit configured to:
• determine whether the knife bar is moving;
• determine whether the end effector is moving;
• and
• initiate a power shutdown mode upon the knife bar and the end effector not moving.

A method of controlling a surgical instrument comprising an end effector, a displacement member coupled to the end effector, the displacement member movable between a first position and a second position, and a knife bar movable between a unfired position and a fired position, the method comprising:

• determining a firing state according to whether the knife bar is moving between the unfired position and the fired position;
• determining an articulation state according to whether the displacement member is moving between the first position and the second position;
• and
• initiating a power shutdown mode according to the firing state and the articulation state.