Rievtech PR-12 Series, User Manual And Programmers Manual

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6.13.4 ROR -B & ROL -B
Input/output Operand Data type
IN (LAD, FBD) VB, IB, QB, MB, SMB, SB, LB, AC,constant, *VD, *LD, *AC Byte
N VB, IB, QB, MB, SMB, SB, LB, AC,constant, *VD, *LD, *AC Byte
OUT VB, IB, QB, MB, SMB, SB, LB, AC, *VD, *LD, *AC Byte
ROR -B & ROL -B :Instruction rotates the input byte to
the right or to the left n bits and puts the result in the
output byte (OUT).Rotation is cyclic.
If N is greater than or equal to 8,the remainder of N/8 is
the number of rotation bits.If remainder is equal to 0
，
Rotation operation is not performed and the value of
SM1.0 is 1.If the rotation operation is performed, the
final rotation bit is copied to overflow bit (SM1.1).
ROR -B & ROL -B operations are not signed.
error conditions:
0006 Indirect address
Special memory bit:
SM1.0 When the value of the loop is zero, SM1.0 is set to 1.
SM1.1 Overflow bit
Example:
When the value of M0.0 is 1,VB0 moves a bit towards the left and VB10 moves a bit
towards the right circularly.