Laurel Electronics Custom ASCII Protocol For Laureate Series 2 Digital Panel Meters, Counters, Timers & L-Series Transmitters - Manual (Page 18)

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8. CONTINUOUS MODE
8.1 OVERVIEW
In the Continuous Operating Mode, measurements are continuously transmitted by the meter
or transmitter in a standard data format using printable ASCII characters at a user-selectable
rate ranging from 50 or 60 Hz line frequency down to one measurement every 72 seconds. This
data may be received by a remote display at a distant location, by a printer for data logging
purposes, or by a host computer for data analysis or system control.
Both hardware (RTS) and software (XON/XOFF) handshaking are available for RS232, but
neither is available for RS485.
8.1 METERS OR TRANSMITTERS WITH DPM OR SCALE METER MAIN BOARD
The transmission rate of the measurement data can be selected in “Ser 1”. The meter
conversion rate equals the AC power frequency (50 or 60 Hz). Any baud rate may be used, but
if less than the minimum baud rate in the table, the transmission rate will decrease accordingly.
Output Rate Data Output Rate Minimum Baud Rate
“Ser 1” Setting 50 Hz / 60 Hz 1 Item Sent 2 Items Sent 3 Items Sent
0
1
2
3
4
5
6
7
8
9 0.021s / .018 s
0.34 s / 0.28 s
0.68 s / 0.57 s
1.4 s / 1.1 s
2.7 s / 2.3 s
5.4 s / 4.5 s
10.9 s / 9.1 s
21.8 s / 18.1 s
43.5 s / 36.3 s
86.7s / 72.3 s
9600
600
300
300
300
300
300
300
300
300
9600
600 / 1200
300 / 600
300
300
300
300
300
300
300
19200
1200
600
300
300
300
300
300
300
300
8.2 METERS OR TRANSMITTERS WITH COUNTER / TIMER MAIN BOARD
The transmission rate of the measurement data can be selected in “Ser 1". Data transmission is
initiated at the end of the calculation time following the gate time. Data is completely trans-
mitted for one measurement before the calculation of the next measurement is started.
Therefore, the reading rate is influenced by the baud rate, the number of items transmitted, and
gate time. If the selected gate time is less than that shown in the table below, it is not the
determining factor of the reading rate. If it is greater, then it is the determining factor. Time
intervals (reciprocal of rate) between transmissions at the reading rate are: