Hitachi NJI-350B - Manual (Page 148)

Chapter 5 Instruction Specifications
5-98
Item number Application instructions-25 Name Distribute
Ladder format Condition code Processing time ( µs) Remark
R7F4 R7F3 R7F2 R7F1 R7F0 Average Maximum
DIST (d, s, n) DER ERR SD V C
↕ z z z z
Instruction format Number of steps
Condition Steps
As per the table
below.
DIST (d, s, n) 4
Bit Word Double word
Usable I/O
X Y
R,
M
TD, SS,
CU, CT WX WY
WR,
WM TC DX DY
DR,
DM C
o
nstant
Other
d
Distribution result write
destination head I/O
{
s I/O to be distributed { { { { {
n
Number of words to be
distributed
{ n=0 to 4
Function
• Distributes s into four bit sections and sets to the lower four bits of the n words starting from d.
• The upper 12 bits of the range d to d + n – 1 will be “0.”
• The value of s will be retained even if DIST is executed.
• Use this instruction so that d + n - 1 does not exceed the I/O range (WRFFF and WM3FF). If it exceeds the I/O range, DER
is equal to '1' and the distribution data for s will be set in the lower four bits within the range between d and the I/O.
d
d+1
d+2
d+3
B1
B2
B3
B4
B4 B3 B2 B1
0 0
0 0
0 0
0 0
s
4 bits
Upper digits Lower digits
When n = 4:
Notes
• When n=0, it is not executed.
DI
S
T
(d,
s
, n)
Processing time ( µs)
n
Average Maximum
0 62 –
1 87 –
2 90 –
3 92 –
4 94 –