Lighthouse RLPC 0.1m, Operating Manual

Page: 74 / 118

Lighthouse REMOTE Liquid Particle Counter (MODBUS Output) Operating Manual
7-2 248083227-1 Rev 8
Running the
Instrument
Using
MODBUS
The applicable action commands are displayed in Table 7-1.
Each of the described action commands above are written to the
command register (40002).
AUTOMATIC Counting Mode
In Automatic counting mode, the instrument uses the configured
sample time and hold time to record samples.
The instrument will continue running samples at the configured sample
time until it receives a stop command. When the stop command is
given, the most current data will not record to the buffer.
After setting all the instrument parameters as described in “Changing
the Default Instrument Parameters” on page 7-4, write these commands
to the Command register (40002):
11 Start Instrument; to start recording
12 Stop Instrument; to stop recording
Table 7-1 Action Commands
Value Action
1 Saves all writable 4xxxx register values to the EEPROM.
3 Clears the Data Buffer. Record count is set to zero.
4 Saves the instrument parameters in the 40xxx registers to
the EEPROM. Parameters include Sample Time, Hold
Time, and Location.
9 Manual Start.
The instrument samples continuously until it receives a
Manual Stop command. Ignores local timing parameters.
Sets Sample Time for data record to equal the time
interval between the Manual Start and Manual Stop
command.
10 Manual Stop.
Stops sampling. Records counts since Manual Start.
11 Instrument Start (Automatic Counting).
Uses defined Hold Time and Sample Time. Instrument
executes samples and holds until an Instrument Stop
command is issued.
12 Instrument Stop.
Aborts current sample. Stops data collection.