Eaton ELC-PB, Programming Manual

Page: 251 / 728

E L C P r o g r a m m i n g M a n u a l
F o r m o r e i nf o r m a t i o n v i sit :
w w w. e a t o n . c o m
MN05003003E
3-82
API Mnemonic Operands Function
30 D ROR P
D, n
Rotate Right
Bit Devices Word devices Program Steps
Type
OP
X Y M S K H KnX KnY KnM KnS T C D E F
D * * * * * * * *
n * *
ROR, RORP: 5 steps
DROR, DRORP: 9 steps
ELC ELCB ELCM
PB PC/PA/PH PV PB PH/PA
32 16 P 32 16 P 32 16 P 32 16 P 32 16 P
Operands:
D
: Address to be rotated
n
: Number of bits to be rotated in 1 rotation
Description:
1. All the bits of
D
are rotated
n
bit places to the right on every operation of the instruction,
which could be every scan.
2. The state of the last bit rotated is copied to the carry flag M1022 (Carry flag)
3. This instruction works best using pulse instruction (RORP, DRORP).
4. If operand
D
uses index F, then only 16-bit instruction is available.
5. If operand
D
is specified as KnY, KnM, KnS, only K4 (16-bit) and K8 (32-bit) is valid.
6. Valid range of operand
n
: 1 ≤
n
≤ 16 (16-bit), 1 ≤
n
≤ 32 (32-bit)
Program Example:
When X0 goes from OFF
→
ON, the 16 bit data of D10 will rotate 4 bits to the right, as shown in
the diagram, bit b3 (prior to rotation) will be moved to the carry flag (CY) M1022.
0 1 1 1 0 1 0 1 0 0 1 1 1 0 0 1
0 1 0 1 1 1 0 0 1 1 1 1 0 0 1 0
0
Upper bit Lower bit
Upper bit lower bit
*
X0
RORP D10 K4
Rotate to the right
16 bits
Carry
flag
Carry
flag
After one rotation
to the right
D10
D10
M1022 M1022
M1022