DVP-ES2/EX2/SS2/SA2/SX2/SE&TP Operation Manual - Programming
API
Mnemonic Operands Function
SS2
SX2
31 D ROL P
Rotate Left
Type
OP
Bit Devices Word devices Program Steps
X Y M S K H KnX
KnY
KnM
KnS
T C D E F
ROL, ROLP: 5 steps
DROL, DROLP: 9 steps
SS2
SX2
SS2
SX2
SS2
SX2
Operands:
D: Device to be rotated n: Number of bits to be rotated in 1 rotation
Explanation:
1. This instruction rotates bit status of the device D to the left for n bits
2. The status of the last bit rotated (marked with ※) is copied to the carry flag M1022.
3. This instruction is generally used in pulse execution mode (ROLP, DROLP).
4. If operand D uses index F, only a 16-bit instruction is available.
5. If operand D is specified as KnY, KnM or KnS, only K4 (16-bit) or 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 to ON, all the 16 bits (4 bits as a group) in D10 will rotate to the left, as
shown in the figure below. The bit marked with ※ will be sent to carry flag M1022.
X0
D10 K4
1 1 1 1 1 1 0 0 0 0 01 1 0 0 0
1 1 0 0 0 0 0 1 100 11 0 1
1 1
16 bits
Rotate to the left
After one rotation
to the left
Carry
flag
Carry
flag
D10
D10
Upper bit
Upper bit
Lower bit
Lower bit
ROLP
M1022
M1022