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Appendix A Estimating the Number of Remote Drops for
a Bus
The number of remote drops that can be installed on a bus depends on the baud rate
and the total number of I/O points in the remote drops. Only twenty fully–loaded
remote drops are supported on a single bus that operates at 153.6 Kbaud (see chapter
1). If remote drops are not fully–loaded, more may be used. The table below will help
you roughly estimate how many remote drops (and data bytes) can be on a bus with
one Bus Controller, one Genius Hand–held Monitor, no datagrams or Global Data
communications, and no Genius I/O blocks. The Genius I/O System User’s Manual
explains how to calculate the bus scan time for a specific bus.
Maximum Capacity (in Bytes)
Number of
Remote
Drops
153.6K Baud
standard
153.6K baud
extended
76.8K baud 38.4K baud
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
loaded
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
5268
5255
5242
5230
5217
5207
5191
5178
5165
513
loaded
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
”
5242
5228
5215
5201
5118
5174
5161
5147
5134
5120
loaded
”
”
”
”
”
”
”
”
”
2617
2607
2597
2589
2581
2567
2557
2547
2537
2527
2515
2507
2497
2487
2477
2467
2457
2447
2437
2427
loaded
”
”
”
”
1279
1271
1262
1254
1246
1237
1229
1220
1212