Lighthouse REMOTE Liquid Particle Counter (MODBUS Output) Operating Manual
B-6
248083227-1 Rev 8
Data
Registers
Data is stored in the input registers (30xxx series), which are read-only.
All data items are four bytes long and are stored across two registers.
Byte and word order for integer data is big-endian. Thus, data items
are formed by placing the high bytes in front of the low bytes.
4
Saves the instrument parameters in the 40xxx registers to the
EEPROM. Parameters include Sample Time, Hold Time, Initial
Delay, and Location.
5
Enable Remote Control. Locks out the instrument’s user interface.
Can only change instrument parameters via MODBUS.
6
Enable Local Control. Unlocks the instrument’s user interface.
Instrument changes can be made at the device itself or through
MODBUS.
7
Start local pump, if applicable - perform before 9 below.
8
Stop pump, if applicable - perform after 10 below.
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. If applicable to device, does not start
pump.
10
Manual Stop.
Stops sampling. Records counts since Manual Start.
11
Instrument Start (Automatic Counting).
Particle Counters: Uses defined Initial Delay, Hold Time, Sample
Interval and counting mode. Instrument executes samples and holds
until an Instrument Stop command is issued. For instruments with
pumps, this command will start the pump.
Manifold Controller: Uses defined Manifold Sequence. Stops
counting and changing position when Instrument Stop command is
issued.
12
Instrument Stop. Aborts current sample. Stops pump, if applicable.
Stops data collection.
13
Set Real Time Clock.
Writes "Data Set" values (from Registers 40035 & 40036) to the
local Real Time Clock. New time value is saved.
Table B-5 Command Register
Value
Action
Summary of Contents for RLPC 0.1m
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