Instruction 57- logic shift – 1 bit shift left – Maple Systems MAPware-7000 User Manual
Page 102
MAPware-7000 Ladder Logic Guide
94
1010-1041 rev. 00
Instruction 57- Logic Shift – 1 bit shift left
Expression:
Space Requirement: 1 line x 3 column Location Requirement: Middle, Right rail
Function:
When the input is ON, the data of register A is shifted 1 bit to the left (MSB direction). 0 is
stored in the right most bit (LSB). The pushed out bit state is stored in the carry flag (CF = S976).
After the operation, if the left most bit (MSB) is ON, the output is turned ON.
Execution Condition:
Input
Operation
Output
CF
OFF
No execution
OFF
---
ON
Execution
When MSB = 1
ON
Set or Reset
When MSB = 0
OFF
Set or Reset
Operand:
Coil or Bit
Register
Constant
Index
Name
X
Y B
S
T.
C.
M
X
W
Y
W
B
W
S
W
T C
D
I
J
K
M
W
A
Operation
Data
√
√
√
√ √
√
√
√
√
√
Example:
When X008 is changed from OFF to ON, the data of BW15 is shifted 1 bit to the left.
The figure below shows an operation example.