I-o-display-systems Basic I/O Product Uživatelský manuál Strana 11

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The Basic I/O 1
1-6(Vol.1)
SYSTEM THROUGHPUT:
Input data throughput is the time from beginning of the first character of an input instruction
to the end of the last character of the response. The processing time of the Host computer will
affect the effective throughput.
Output Execution throughput is the time from the beginning of the first character of an
instruction until the actual output changes. Because the instruction acknowledgment occurs
before the outputs actually change state, the processing time of the host computer controlling
output instructions can reduce the effective throughput. This is even possible at 38,400 baud
to instruct the BASIC I/O to turn a digital output on and then immediately instruct it to turn
back off so quickly that the module never actually gets activated
.
Tables below show milliseconds per channel and channels per second for 1 and 16 I/O
channel cases
.
THROUGHPUT TABLES
Input (Digital M) Output (Digital J)
1 Channel 16 Channels 1 Channel 16 Channels
Baud Rate mSec/
Chan
Chan/Sec mSec/
16 Ch
Chan/ Sec mSec/
Chan
Chan
/Sec
mSec/
16 Ch
Chan /Sec
300 501 2 501 32 379 3 379 42
600 251 4 251 64 195 5 195 82
1200 126 8 126 127 104 10 104 154
2400 64 16 64 252 58 17 58 277
4800 32 31 32 496 35 29 35 458
9600 17 60 17 962 23 43 23 682
19200 9 113 9 1816 18 56 18 902
38400 5 204 5 3261 15 67 15 1076
Input (Analog L) Output (Analog S)
1 Channel 16 Channels 1 Channel 16 Channels
Baud Rate mSec/
Chan
Chan/
Sec
mSec/
16 Ch
Chan/ Sec mSec/
Chan
Chan
/Sec
mSec/
16 Ch
Chan /Sec
300 639 2 2639 6 484 1984 2 8
600 323 3 1323 12 250 4 1000 16
1200 164 6 664 24 134 7 509 31
2400 85 12 335 48 75 13 263 61
4800 46 22 71 94 46 22 140 114
9600 26 39 88 181 32 32 78 204
19200 16 63 47 339 24 41 48 335
38400 11 91 27 602 21 48 32 494
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