SMA Protocol
PR 5220 Instrument Manual 
EN-130  Sartorius 
Standard Reply 
With most commands, the reply format is as described below: 
Exceptions are the commands: 'D', 'A'/'B' and 'I'/'N'. 
<LF> <s> <r> <n> <m> <f> <xxxxxx.xxx> <uuu> <CR> 
Reply format and meaning:
 
<LF>    Start of reply message 
<s>  Scale status  Definition / example 
  ‘Z’   Zero within 1/4d <xxxxxx.xxx>= 0.000 
  ‘O’  Above Max <xxxxxx.xxx>= +weight 
  ‘U’  Below zero <xxxxxx.xxx>= - weight 
  ‘E’  Zero setting error 
  ‘T’  Taring error 
  <space>  None of the above conditions 
    Note: For ‘E’, ‘I’, ‘T’ error conditions 
    <xxxxxx.xxx>= ————— (minus sign) 
    and ‘Z’, ‘O’, ‘U’ are overwritten. 
<r>  Range  (‘1’, ‘2’, ‘3’, etc.) always ‘1’ for single range scales 
<n>  Gross/net  Status 
  ‘G’  Gross weight 
  ‘T’  Tare weight (as reply from ‘M’ command) 
  ‘N’  Net weight 
  ‘g’  High-resolution gross weight 
  ‘n’  High-resolution net weight 
<m>  Stability status   
  ‘M’  The scale is not stable 
  <space>  The stability-of-scale condition is met 
<f>  Reserved for future extensions 
<xxxxxx.xxx>  Weight value; the field has always 10 characters 
<uuu>  Unit of the weight value 
<CR>  End of the reply message 
Example:     
Command  Reply   
<LF>W<CR>  <LF> <_> <1> <G> <_> <_> <_ _ _ _ 5.025> <lb_> <CR> 
<LF>W<CR>  <LF> <_> <1> <N> <_> <_> <_ _ _ _ 100000> <lb_> <CR> 
<LF>H<CR>  <LF> <_> <1> <g> <_> <_> <_ _ _ _5.0025> <lb_> <CR> 
<LF>Z<CR>  <LF> <Z> <1> <G> <_> <_> <_ _ _ _ _0.000> <lb_> <CR> 
<LF>R<CR>  <LF> <_> <1> <G> <_> <_> <_ _ _ _ 7.025> <kg_> <CR> 
  <LF> <_> <1> <G> <M> <_> <_ _ _ _ 7.650> <kg_> <CR> 
  ... repeat... 
  <LF> <_> <1> <G> <_> <_> <_ _ _ _ 7.650> <kg_> <CR> 
  The scale repeats the weight, until another command is received.