Lighthouse RLPC 0.1m, Operating Manual, Page: 77 / 118

Programming with MODBUS Protocol
248083227-1 Rev 8 7-5
Using Sensor Setting Registers
Certain configuration settings can be sent to the counter through these
registers.
Sensor Setting Registers 40001 and 40003 through 40023 are protected
and should not be changed.
Location (Register 40026)
For Particle Counters, this value specifies at what location a sample
was recorded.
For Manifold Controllers, this value specifies the manifold position.
Writing a value from 1-32 to this register will move the manifold arm
to that position on the manifold. Value 0 moves the arm to the Home
position.
Hold Time (Registers 40031, 40032)
The Hold Time is used for pausing in between samples for multiple
cycles. If Hold Time is greater than 1 minute, the pump will turn off.
This time is specified in seconds. The maximum value is 359,999
seconds (high word: 5, low word: 32319) which is 99 hours, 59
minutes, and 59 seconds. To set the Hold Time to a value less than 9
hours, 6 minutes, 7 seconds, enter the number of seconds in the
low
register (40032).
During Hold Time, the Device Status bit is 0 (Idle).
Sample Time (Registers 40033, 40034)
WARNING:
Do NOT
set the Sample Time
value to less than 30
seconds.
The Sample Time specifies the time period of each sample, specified in
seconds. The maximum value is 86,399 seconds (high word: 1, low
word: 20863) which is 23 hours, 59 minutes, 59 seconds. The
instrument is programmed at the factory with a default value of 60
seconds. Do NOT set this value to less than 30 seconds.
To set the Sample Time to a value less than 9 hours, 6 minutes, 7
seconds, enter the number of seconds in the
low register (40034).
During the Sample Time, the Device Status is 1 (Sampling).