Maple Systems MAPware-7000 - Manual (Page 180)

MAPware-7000 Ladder Logic Guide 172
1010-1041 rev. 00
Instruction 108- Encode
Expression:
Space Requirement: 1 line x 5 column Location Requirement: Middle, Right rail
Function:
When the input is ON, this instruction finds the bit position of the most significant ON bit in a bit
table. The bit table is defined as starting with bit 0 (Least Significant Bit) of Register A, and of
size 2
n (where n can be 1-8). The value is stored in Register B.
Execution Condition:
Input Operation Output ERF
OFF No execution OFF ---
ON Normal Execution ON ---
There is no ON bit (no execution) OFF Set
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 Start of table √ √ √ √ √ √ √
N Table Size 1-8
B
Encode
Result
√ √ √ √ √ √ √ √ √
Example:
Since n=5, the size of the bit table is 2 5 (32) bits. The bit table starts with bit 0 of BW05
(since BW05 is a 16 bit register, then BW06 is also part of the bit table). When B010 is
ON, the most significant ON (1) bit position in the bit table is searched, and the position
is stored in D0010.