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LaserSpeed Pro 8500-4 Instruction Handbook: RS-232/RS-422 Communication
6-61
6.6
Real-Time Data Timing
When transmitting data at fast update rates, consideration must be given to the amount of time that it takes to
transmit a single message. If the transmission time exceeds the update rate, it is impossible for the LS8500-4
to transmit all data. Ethernet UDP is fast enough that this does not occur, but it can occur over RS-232. For
example, if the RS-232 baud rate were set to 57.6k, a TE data reading would take 4.86ms to transmit. If the
User Update Rate is set to 4ms, this will result in every other message being skipped, resulting in an actual
update rate of 8 ms. The gauge's measurements will not be affected by this
—it will still produce accurate
measurements.
time / ms
0
1
2
3
4
5
6
8
9
10
11
12
13
14
15
16
Still transmitting last measurement- these
measurement transmissions are skipped.
7
The following table lists the fastest update rate possible for each baud rate. If using TB mode, the
framing must be set to an 8n1 mode.
Transmission Time
Fastest Update Rate
Baud Rate
1 Byte
TE
TB
TE
TB
460.8k
21.7μs 0.61ms 347μs
2ms
2ms
230.4k
43.4μs 1.22ms 694μs
2ms
2ms
115.2k
86.8μs 2.43ms 1.39ms 4ms
2ms
57.6k
173μs
4.86ms 2.78ms 6ms
4ms
38.4k
226μs
7.29ms 4.16ms 8ms
6ms
19.2k
521μs
14.6ms 8.33ms 16ms
10ms
9600
1.04ms 29.2ms 16.7ms 30ms
18ms
4800
2.08ms 58.3ms 33.3ms 60ms
34ms
Содержание BETA LaserMike LaserSpeed Pro 8500-4
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