Delta RMC101 User Manual Page 834

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RMC100 and RMCWin User Manual
C-64
0 0 0 Voltage: 0V to +10V
0 0 1 Voltage: -10V to +10V
0 1 0 Voltage: 0V to +5V
0 1 1 Voltage: -5V to +5V
1 0 0 Current: 4mA to 20mA
For a description of the corresponding transducer count ranges, refer to the Counts topic.
Unused - Bits 7 and 15
These bits are reserved for future use and should be cleared on analog axes.
C.5.4 Scale A, Scale B (Pressure)
Default: 32767 for 16-bit, 4096 for 12-bit
Range: -32768 to 32767
TIP: On the Tools menu, click Scale/Offset Calibration to help calculate Scale and Offset.
These two parameters have slightly different uses when using the axis as a differential force
versus when the axis is used for single-ended pressure.
For single-ended pressure, Scale A is used to calculate the Actual Pressure in pressure units
from Counts A. Scale B is unused.
For differential force, Scale A is used to calculate Actual Force A in force units from Counts A,
and Scale B is used to calculate Actual Force B in force units from Counts B. Actual Force B is
then subtracted from Actual Force A to give the Actual Force, which is displayed in the Actual
Pressure status field.
Note: When a scale is set to 0, it is treated as though it were 32768. This allows a one-to-one
relationship between counts and pressure or force units. Similarly, a Scale value of -32768
represents a negative one-to-one relationship between counts and position units (increasing
counts mean decreasing pressure or force units).
Note: In RMC100 CPU firmware prior to 19991216, these scales could not be set to 0 or -32768.
Scale is defined as 32768 times the Prescale Divisor times the number of pressure units for
pressure axes or force units for differential force axes per count:
Where P0 and P1 are two pressures for forces and C0 and C1 are the corresponding counts at
those pressures/forces. The Prescale Divisor is specified in the Configuration Word.
In pressure and force applications, Scale can be used for two purposes:
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