Hitachi RAC-25WX8 - Communication Waveforms; Serial Communication Format

– 93 –
(1) Outdoor HIC(AX-8T11) to indoor microcomputer [Serial Communications Format during Normal Communications]
[Example] When the outdoor message is all 0s and indoor message is all 1s.
(2) Indoor microcomputer to outdoor HIC (3) Communications waveforms
Leader
(100ms.)
Leader
(100ms.)
When reset
(approx.100ms.)
When reset
(approx.10ms.)
35
(
V
)
34
(
V
)
36
(
V
)
0
7
0
7
7
7
0
(33.3ms.)
3
2
1
Character No.
0
Bit No. = 0
Fig. 3-4
7
0
7
0
7
0
7
Bit No. = 0
3
2
1
(33.3ms.) (33.3ms.)
(33.3ms.)
Transmit/ receive switching time
(4.95ms.)
(33.3ms.) (33.3ms.)
Outdoor message
Indoor message
(33.3ms.)(33.3ms.)
0
Character No.
1 frame = 100ms.+33.3ms. 8+4.95ms. = 371.35ms.