Scale, C.6.4 scale – Delta RMC101 User Manual

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Appendix C: Parameter Field Reference

C-81

Voltage: 0V to +10V

Voltage: -10V to +10V

Voltage: 0V to +5V

Voltage: -5V to +5V

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.6.4 Scale

Default: Transducer specific
Range: -32768 to 32767

This scale is used on MDT, SSI, Analog position axes with the Offset parameter and the Prescale
Divisor bits of the Config word to convert the Transducer Counts to an Actual Position.
Quadrature axes use this parameter with the Prescale Divisor bits to convert from the change in
Transducer Counts to a change in the Actual Position. Resolver axes use this parameter together
with the Count Offset to calculate the Actual Position.
For details on converting counts to position units see the appropriate topics for your transducer
types:

• Analog Scaling
• MDT Scaling
• Quadrature Scaling
• SSI Scaling
• Stepper Scaling
• Resolver Scaling

Note:

When the Scale is set to 0, it is treated as though the Scale is set to 32768. This allows a

one-to-one relationship between counts and position units. Similarly, a Scale value of -32768
represents a negative one-to-one relationship between counts and position units (increasing
counts mean decreasing position units).

Note:

You should never set the Scale below 16383 (except for resolver axes). If it does go

below that value, then use the Prescale Divisor bits in the Configuration Word. For details, refer
to the discussion on scaling for your transducer type.

Note:

In RMC100 CPU firmware prior to 19991216, Scale could not be 0 or -32768 for MDT,

SSI, and analog transducers.

This manual is related to the following products:

RMC100