054
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DATALOGGER
NI2400
NI2400
055
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DATALOGGER
NI2400
NI2400
(Reg Address (hex)). You can “Force Multiple Reg” o “Write Coil”.
Wait Condition
enabled let the NI2400 check if Coil, Input or Holding are less, more, equal
or different from a chosen Value. It allows also to wait for a certain time.
Endianess
allows to select if the sensor use a Little Endian or Big Endian data type.
Acquire Measures:
This section is the actual data reading from the modbus sensor. On most sensors, this is the
only section the User should care of.
Measure n
enabled allows the NI2400 to read the register (Holding, Input or Coil) at the
specified “Reg Address (hex)”. Data Type is Signed or Unsigned Integer, Float and Fixend
Point.
Register Number&Order
let the User choose which register and in which order data is
stored in. Usually is reported in sensor’s datasheet or instruction manual.
Endianess
allows to select if the sensor use a Little Endian or Big Endian data type.
Post Measure Actions:
As
Pre Measure Actions
, this is not always required, but some sensors need a register to be
written in order to return in standby or reset. Settings are quite similar to
Pre Measure Ac-
tions
’
Send Command
, which can be enabled or not, and actions are
Force Multiple Reg
,
Write Coil
(Register Address is specified in Reg Address (hex) field) and Wait Time.
Endianess
allows to select if the sensor use a Little Endian or Big Endian data type.
Output configuration and alarms 1 & 2
This are channel related settings. The user can specify channel name, a short description,
and data conversion.
Conversion:
Linear:
if sensor output is linear, the systems needs to know Zero Point (Ez) and Sensibility(S)
and Number of Decimals (field will be enabled). The output will be equal to Sx - Ez
Polynomial:
if sensor output is not linear this allows the user to specify sensor output curve,
and enable Zero Reading (Ez), Poly.Coeff. A, B, C and D and Number of Decimals. The out-
put will be equal to Ax3 + Bx2 + Cx + D - Ez
Engeneering Units:
to complete data with the right engeneering unit like bar,°C, °F, %HR
and so on.
Number of Decimals: after linear or poly conversion, here are the number of decimal digits
the system will round the value at.
Skipped:
the system will ignore this sensor
Virtual channel alarm
This section enables Logical Operations with Virtual Channels Alarm. Virtual Channels sec-
tion allows logial operations between alarms, (AND, OR, XOR, NOT).
Figure 42
Figure 43
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