Appendix F: PMS Multi-Drop Protocol (MiniLaz Emulation)
Page F-4 Lasair II Particle Counter Operations Manual
Lock/unlock the keyboard (1/0). If the keyboard is not locked, the
instrument can be stopped or controlled from front panel.
CNOS nnn
Response: “RNOS mmm”
Set total number of samples. Setting to -1 causes continuous
sampling.
If the operation is successful, nnn = mmm.
CPDELAY sec
Response: “RPDELAY sec”
Set purge delay in seconds.
CPQ
Response: “RPQ 1” or “RPQ 0”
Pop oldest sample off of data queue. This command will un-erase
the oldest sample data if no samples are taken, and locations are not
erased.
CQC
Response: “RQC nnn m”
Get number of samples in queue, and 0/1 for sampling (1) or not
sampling (0).
CSN
Response: "CSN s_n"
Returns the Lasair II particle counter serial number.
CSR
Response: “RSR”
Causes instrument to reboot about 1.5 seconds after receiving the
command. It takes several seconds to recover communications.
CSS
Start Sampling
Response: “RSS 1
” (success) or “
RSS 0” (failure)
CTD
Response: “RTD data_packet”.
Transmit data in MiniLaz compatible format. Only 5 particle
channels are sent. The extra channel is merged in as well as
possible. Only temp/rh analog channels sent. Additional Lasair II
particle counter analog channels are not reported. The time stamp in
the data packet is at the sample’s start. The normal Lasair II particle
counter time stamp is at the end of the sample.
CTD2
Response: “RTD2 data_packet” or “RND2” if no data available.
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