nn
= the number of values to be returned when one or more subsequent
D
commands are
issued.
See the following example. A data logger has three sensors wired into terminal C1. The sensors
are addresses X, Y, and Z. The data logger will issue the following commands and receive the
following responses:
Table C-3: Example aC! sequence
XC!
The data logger makes a request to sensor X to start
a concurrent measurement.
X03005<CR><LF>
Sensor X immediately indicates that it will have 5 (05)
values ready for collection within the next 30 (030)
seconds.
YC!
The data logger makes a request to sensor Y to start
a concurrent measurement.
Y04006<CR><LF>
Sensor Y immediately indicates that it will have 6 (06)
values ready for collection within the next 40 (040)
seconds.
ZC!
The data logger makes a request to sensor Z to start
a concurrent measurement.
Z02010<CR><LF>
Sensor Z immediately indicates that it will have 10 val-
ues ready for collection within the next 20 (020)
seconds.
ZD0!
After 20 seconds have passed, the data logger starts
the process of collecting the data by issuing the first
D
command to sensor Z.
Z+1+2+3+4+5+6+7+8+9+10<CR><LF>
Sensor Z immediately responds with the sensor
address and the 10 values.
XD0!
10 seconds later, after a total of 30 seconds have
passed, the data logger starts the process of data
from sensor X by issuing the first
D
command.
X+1+2+3+4+5<CR><LF>
The sensor immediately responds with the sensor
address and the 5 values.
SDMS40 Multipoint Scanning Snowfall Sensor
35
