F

Words starting with F.

• fail-safeA design where a broken wire or a lost signal stops the machine instead of leaving it running. A Stop wired as normally closed is fail-safe.
• falling edgeThe moment a signal changes from on to off. It lasts one scan.
• FBDFunction Block Diagram: a PLC language of blocks joined by wires, with values flowing left to right from input tags to output tags.
• firmwareThe program inside a MicroController. FORGE installs its own firmware so the MicroController can pass pin values to your tags.
• forceA value you hold on a tag by hand. The tag keeps it whatever the logic writes, until you remove the force or clear all forces.
• Format DINT as DecimalTurns a whole number into text containing its decimal digits and a minus sign if needed. For example, -7 becomes the text -7.
• FRCFIRST Robotics Competition, where high school teams build and program robots. Arena lets FRC teams program their robot with PLC logic.