Programming with MODBUS Protocol
248083317-1 Rev 4 5-5
Changing the Default Instrument Parameters
The main instrument parameters involved with the operation of the
REMOTE counter are Location, Sample Time, and Hold Time. See
Table 5-4.
The Location is set by writing an unsigned integer to register 40026.
The range of values is from 0 to 999.
Sample Time and Hold Time both use 2 registers, a high word and a
low word. If the desired value for any of these parameters is less than
or equal to 9 hours, 6 minutes and 7 seconds (32767 seconds), then
only the low word register needs to be written with the value in
seconds.
The low word register for Sample Time is 40034.
The low word register for Hold Time is 40032.
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.
Table 5-4 Instrument Parameters
Register Data Type Description
40026 unsigned integer Location number
Specifies location of Particle Counter.
40031 unsigned integer Hold Time [high].
Works in conjunction with 40032. Number of
seconds to wait between sample periods. Max value
is 359,999, which equals 99h 59m 59s
40032 unsigned integer Hold Time [low]
40033 unsigned integer Sample Time [high].
Works in conjunction with 40034. Number of
seconds to sample. Max value is 86,399, which
equals 23h 59m 59s.
40034 unsigned integer Sample Time [low]
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