Mitsubishi Electric M800VW Series Programming Manual page 306

Plc programming

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M800V/M80V Series PLC Programming Manual (1/2)

8 Function Instructions

8.7 Rotation Instructions

 Operation errors

 There are no arithmetic errors associated with DROR(P) or DRCR(P) instructions.

 Program example

 The following program rotates the contents of D0 and D1, not including the carry flag, 4 bits to the right when XC is ON.

1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1

Number of rotations

0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0

Contents of b3

through b0 prior to

 The following program rotates the contents of D0 and D1, including the carry flag, 4 bits to the right when XC is ON.

0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1

1 1 1 * 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0

Contents of b2

through b0 prior to

Contents of carry flag SM12 prior to execution

(*) The carry flag goes ON or OFF depending on its status prior to the execution of the DRCR instruction.

[Ladder mode]

Contents of b31 through b4

prior to execution

[Ladder mode]

Contents of b31 through b4

prior to execution

Contents of b3 prior to

Contents of b3 prior to

IB-1501667-B

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