NCI 6702 User Manual page 14

Communication - Continued
Weight
Command ("W")
Scale Status
Command ('S')
Zero
Command ('Z')
Implementation of this command will be mandatory. This command causes the scale
to return to a WYSIWYG (What you see is what you get) of its display when it is in
normal weighing mode. That is, the scale will send whatever is showing on its display
including any minus sign/and or decimal point. If it is weight, the units of measure will
be returned in addition to the displayed weight. For decimal weight, the length of the
weight field will be equal to the length of the scale's display plus two for the units, e.g.,
("lb"). Units of measure will appear in their ANSI standard abbreviation form ("lb" for
pounds, "kg" for kilograms, etc.) If the scale is displaying all upper bars ("over capacity"),
the weight field will be filled with carets("^^^^^^"). If the scale is displaying all lower
bars (under capacity), the weight field will be filled with underscores ("
scale is displaying middle bars (zeroing error), the weight field will be filled with dashes
("- - - - - -"). These examples are for scale with a 6-digit display.
Implementation of this command will be mandatory. There will be at least two status
bytes. If bit 6 of the second status byte is set then there will be a third byte. Bit 6 of each
byte will indicate whether or not another status byte follows. The bit will be clear (0) in
the last status byte. At this time only the first three bytes are defined. Others may be added
in the future. The status bits are defined as follows:
Bit
0 1 = Scale in motion
0 = Stable
1 1 = Scale at zero
0 = Not at zero
2 1 = RAM error
0 = No RAM error
3 1 = EEPROM error
0 = No EEPROM error
4 Always 1
5 Always 1
6 Always 0
7 Parity
Implementation of this command will be mandatory. If zeroing criteria are met, the scale
will is zeroed. In any case, scale status is returned.
First Status Byte Second Status Byte
1 = Under capacity
0 = Not under capacity
1 = Over capacity
0 = Not over capacity
1 = ROM error
0 = No ROM error
1 = Faulty calibration data
0 = caliobration data okay
Always 1
Always 1
1 = Byte follows
0 = Last byte
Parity
"). If the
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