Measuretek PS-103-180, Operation Manual

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PS ‐ 103 www.measuretek.net . 6 .
Serial Communication (continued)
weight measure cycle of the scale. One second is adequate for use as a time-out value by remote (controlling) device. After
receiving an available command, the indicator will send out the corresponding messages:

For normal operation, weight data will be 8 digits long; minus sign will be 1 digit; decimal point will be 1 digit; and unit of
measure will be 2 digits if “lb” or “kg”, and 5 digits if “lb:oz”. Unit of measure abbreviations are always lower case.

If the weight is over capacity, the scale will return ten ‘^’ characters (the minus sign, decimal point, and weight data fields
are filled by ‘^’).

If the weight is under capacity or if there is a zero point error, the scale will return ten ‘_’ characters.

The minus ‘-’ character indicates negative weight, and a space ‘ ’ character indicates positive weight. The minus sign follows
after the first digit.

Leading zero digits are suppressed.
Serial Communication Symbols
<LF>
Line Feed character (hex 0AH)
<CR> Carriage Return character (hex 0DH)
<ETX> End of Text character (hex 03)
<SP>
Space (hex 20H)
H1H2H3
Three status bytes (see below for byte definitions)
<p> Polarity (minus sign for negative weight and space for positive weight)
W1-W8 Weight data
<dp>
Decimal point
U1U2
Measure units, “kg”, “lb”, or “lb oz”
Status Byte Definitions
Bit Byte 1 (H1) Byte 2 (H2) Byte 3 (H3)
0
0=stable 0= not under capacity
01=normal work mode
10= hold work mode
00=not defined
11= not defined
1= not stable 1= under capacity
1
0= not at zero point 0= not over capacity
1= at zero point 1= over capacity
2
0=not AD over 0=not zero over 0= gross weight
1=AD over 1=zero over 1= net weight
3
0= eeprom OK 0=not zero down 0=not AD down
1= eeprom error 1= zero down 1=AD down
4 always 1 always 1 always 1
5 always 1 always 1 always 1
6 always 0 always 1 always 0
7 parity parity parity