Fairbanks PC2250 Utility Software - Manual (Page 61)

Appendix I: Data Output Formats
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5. Interpretation of scale status digits
The high order nibble of each status byte has a value of 3 (0011 B). The low order
nibble of the first and second bytes are defined as follows:
1st Byte: Bit 0 - High = scale is in motion
Low = scale is stable
Bit 1 - High = scale at zero
Low = scale not at zero
Bit 2 - Low = not used
Bit 3 - Low = not used
2nd Byte: Bit 0 - High = scale is below zero
Low = scale is not below zero
Bit 1 - High = scale is over capacity
Low = scale is not over capacity
Bit 2 - High = scale ROM program failure
Low = scale ROM okay
Bit 3 - High = faulty calibration data*
Low = scale calibration okay
*This is the result of an incorrect checksum
An example of the scale response to an "S" command would be:
S20
The following status conditions are in effect for this response:
•scale at zero
•scale is not below zero
•scale is not over capacity
•scale ROM okay
•scale calibration okay