Command

 OR: Parallel normally open contact orders

 Register the results of the contents and the contents of the designated relay logic "or", and the results into the results register.

 OR /: Parallel normally closed contact orders

 Relay the contents of the specified non-after results from the contents of register logic "or", and the results into the results register.

 Examples explained

 When connected X0 or X1 or X2 disconnect, Y0 are stimulated.  In the proceedings OR, OR / directives can be used for many times.  Timing diagram, as shown in Figure 4-5.

 The first analysis of the output Y0, Y1, Y2 and the importation of X0, X1, X2, X3 the logical relationship between. ₂₃₉₁₀ T ₂ by ₃ ~ t, t ₉ ~ t of ₁₀ and X1 that X0 "logic and" control Y0, as pictured shown.

_158111314 From ₁ t ₅ ~ t, t ₈ ~ ₁₁ t, t ₁₃ ~ ₁₄ t of visible X0, X1 "logic or" control Y1, as pictured shown.

_{2367910121523910671215} T ₂ by ₃ ~ t, t ₆ ~ t _7; t ₉ ~ ₁₀ t, t ₁₂ ~ ₁₅ t of t ₂ ~ t foreseeable _3; t ₉ ~ t ₁₀ is X0, X1 phase "and" control Y2, t ₆ ~ t _7; t ~ ₁₂ t ₁₅ is X2 control Y2, X0, X1 phase "and" X2 phase and then "or" control Y2, as pictured shown.

 X3 is not related to the control signal, the overall ladder diagram, as shown in Figure 4-7.