Moore Industries NET Concentrator System AOM, Руководство пользователя

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NET Concentrator System
®
NCS
- 101 -
Moore Industries-International, Inc. www.miinet.com
The scaled integer value of 16862 (0x41DE) equals 80.862 degrees Fahrenheit
Input Modules:
To convert a Scaled Integer PV to a Float PV (e.g. to interpret an input module’s PV):
Float PV= (Scaled Int PV-Scaled Int Zero) + FloatZero
( ) Float Full-FloatZero
Scaled Int Full-Scaled Int Zero
Float PV= (Scaled Int PV-4096) + FloatZero
( )
FloatFull-FloatZero
57344
Scaled Int PV= (FloatPV-Float Zero) +Scaled Int Zero
( )
Scaled Int Full-Scaled IntZero
FloatFull-FloatZero
Scaled Int PV= (FloatPV-Float Zero) +4096
( )
57344
FloatFull-FloatZero
Float PV= (Scaled Int PV-4096) + FloatZero
( )
FloatFull-FloatZero
57344
Float PV= 80.862°F
Float PV= (16862-4096) + (-400)
( )
1760-(-400)
57344
If the default Integer Scaling settings are used the equation above simplifies to:
To convert a Float PV to a Scaled Integer PV (e.g. to drive an analog output):
Examples
Example #1-A:
This example illustrates using the default scaled integer behavior to read and interpret a value from a TIM channel,
and to calculate an integer value to write to an AO channel. This scenario is applicable to systems when the
system-wide “User Defined Integer Scaling” setting is disabled.
Input Configuration : RTD 3850,100R,°F
Input Range : -400 to 1760°F
User Defined Integer Scaling : Disabled
Upon accessing the Scaled Integer corresponding to this input channel, the user observes a value of 16862
(0x41DE.) The following calculation is performed to convert this value to Floating point:
If the default Integer Scaling settings are used the equation above simplifies to:
Output Modules: