Manual EDM 180
Revision 1.0 29.03.2010 Page 60/61
The "ST"-Telegram (ASCII-format):
Byte-Nr. Data format Field description
1 <STX> start of text
2-3 ST telegram code
4-6 nnn instrument identification
7-8 #A empty space key, ( mostly a letter )
9 <ETX> end of text
10 <BCC1> block symbol upper nibble
11 <BCC2> block symbol lower nibble
The following "ST"-telegrams has been incorporated:
"R" (Run) start of measurement
"S" (Standby) stop of measurement
"N" (Zero (Null)) acts like in Run
"K" (Calibration) the status bit 3 will be set
For the control only (instrument identification), (instrument identification +1), and (instrument identification
+2) are permissible.(Instrument identification +3)is NOT permissible, not even for 4 parameters.
Hex-Format:
Byte-Nr. Data format Field description
1 <STX> tart of text
2-3 ST telegram code
4-6 nnn instrument identification
7-8 hh upper nibble, lower nibble
9 <ETX> end of text
10 <BCC1> block symbol upper nibble
11 <BCC2> block symbol lower nibble
# is the synonym for a blank character
The sign „#“ symbols the space key, „nnn“ the numbers, „ee“ s the exponent and „hh“ is the hexadecimal
presentation of one Byte.
To get the block checksum, the Exclusive-Or sum is calculated by adding the bytes of all transmitted
symbols (incl. STX and EXT, starting from Zero) . The result is shown as two nibble hexadecimal signal
and transmitted.
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