Mitsubishi FX1N Series Programming Manual

FX Series Programmable Controlers Applied Instructions 5
5-57
5.5.3 ENCO (FNC 42)
Operation:
The highest active bit within the readable range has
its location noted as a numbered offset from the
source head address (S). This is stored in the
destination register (D).
Points to note:
a) The readable range is defined by the largest number storable in a binary format within the
number of destination storage bits specified by n, i.e. if n was equal to 4 bits a maximum
number within the range 0 to 15 can be written to the destination device. Hence, if bit
devices were being used as the source data, 16 bit devices would be used, i.e. the head bit
device and 15 further, consecutive devices.
b) If the stored destination number is 0 (zero) then the source head address bit is ON, i.e. the
active bit has a 0 (zero) offset from the head address. However, if NO bits are ON within the
source area, 0 (zero) is written to the destination device and an error is generated.
c) When the source device is a data or word device n must be taken from the range 1
to4as
there are only 16 source bits available within a single data word.
Mnemonic Function
Operands
Program steps
SD n
ENCO
FNC 42
(Encode)
Then location of
the highest active
bit is stored as a
numerical position
from the head
address
X, Y, M, S,
T, C, D, V,
Z
T, C, D, V,
Z
K, H,

Note:
S=X, Y, M, S then
n range=1-8
S= T,C,D then
n range = 1-4
n = 0, then no
processing
ENCO,
ENCOP:
7steps
FX 1S
FX 1N FX 2N
FX 2NC
PULSE-P 16 BIT OPERATION 32 BIT OPERATION
X5
D 10 K 3
[ S ] [ D ]
M 10
[ n ]
ENCO
M15 M14 M13 M12 M11 M10M16M17
01000 000
7. 6. 5. 4. 3. 2. 1. 0.
0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1
D10
421
..
+
= 3

Mitsubishi FX1N Series Specifications

General

Brand	Mitsubishi
Model	FX1N Series
Category	Controller
Language	English