APPENDICES
APP − 68
MELSEC-A
Appendix 2.2 Instruction Processing Time of CPUs
(1) Sequence instructions
Table 2.4 Instruction Processing Time of CPUs
Processing Time (µs)
An
AnN, A3V, A73,
A3N Board
A3H, A3M
A2A,
A2U
A3A,
A3U,
A4U
Instruction Condition (Device)
D R D R D R R
X 2.3 1.0 2.3 2.0 0.20 0.20 0.15
LD, LDI
AND, ANI
OR, ORI
Y, M, L, B, F, T, C 1.3 1.0 1.0 0.20 0.20 0.20 0.15
ANB
ORB
1.3 1.0 1.0 0.20 0.20 0.20 0.15
Unchanged
(OFF → OFF, ON → ON)
2.3 1.0 2.3 0.35 0.35 0.40 0.30
Y
Changed (OFF → ON, ON → OFF) 2.3 1.0 2.3 2.0 0.40 0.40 0.30
Unchanged
(OFF → OFF, ON → ON)
1.3 1.0 0.35 0.35 0.35 0.40 0.30
L, S, B
M (other than
special M)
Changed (OFF → ON, ON → OFF) 1.3 1.0 1.0 0.40 0.40 0.40 0.30
Special M 37 37 0.40 0.40 0.80 0.60
Unexecuted 66 61 61 62 62 2.8 5.0
F
Executed 700 663 663 283 283 99 77
Instruction execution time 1.3 1.0 1.0 0.2 0.2 0.40 0.30
Unexecuted 1.3
0
38 for
A3V
0 0 0 0.23 0.18
After time out 15 11 11 3.7 3.7 4.5 3.3
K 30 24 24 5.9 5.9 7.7 5.7
T
Processing
time at the
execution
of END
instruction
Exe-
cuted
Added
D 36 30 30 5.9 5.9 7.7 5.7
Instruction execution time 1.3 1.0 1.0 0.20 0.20 0.40 0.30
Unexecuted 1.3 0 0 0 0 0.27 0.20
Uncounted 14 0 0 0 0 0.27 0.20
After count out 14 0 0 0 0 0.27 0.20
K 28 25 25 3.8 3.8 4.2 3.1
OUT
C
Processing
time at the
execution
of END
instruction
Exe-
cuted
Added
D 33 30 30 4.6 4.6 4.8 3.6
Unexecuted 2.3 1.0 2.3 0.35 0.35 0.40 0.30
Unchanged (ON → ON) 2.3 1.0 2.3 0.35 0.35 0.40 0.30
Y
Executed
Changed (OFF → ON) 2.3 1.0 2.3 2.0 0.40 0.40 0.30
Unexecuted 3.7 1.0 1.0 0.35 0.35 0.40 0.30
Unchanged (ON → ON) 41 1.0 1.0 0.35 0.35 0.40 0.30
M, L, S, B
Executed
Changed (OFF → ON) 41 1.0 1.0 0.40 0.40 0.40 0.30
Unexecuted 3.0 3.0 0.80 0.80 0.80 0.60
Special M
B
Executed 32 32 1.4 1.4 0.80 0.80
Unexecuted 3.7 3.0 3.0 0.80 0.80 2.0 1.5
SET
F
Executed 730 638 638 283 283 99 77
R: Refresh mode, D: Direct mode
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