E C O P H Y S I C S RS-232 interface
CLD 780 TR / July 2000 106
Error code byte definition:
7 0
1 IE IW
Comm. error code
Bit 0...3:
Communication error code
0 no error
1 Block check error *)
2 Command overflow *)
3 Invalid command
4 Invalid operation
6 Command not allowed in current instrument mode
7 Reserved
Bit 4:
IW Instrument warning bit
Set if any instrument warning pending. The ”Report Status“ (RS) command
returns the warning code with the highest priority.
*) NAK acknowledge
→
repeat message
Bit 5:
IE Instrument error bit
Set if any instrument error pending. The “Report Status“ (RS) command re-
turns the warning code with the highest priority
Bit 6:
Always “1“
Bit 7:
Not defined
Block check code
The BCC is generated by XOR-ing every message byte over the message
block - including STX and ETX.
The resulting character is transmitted at the end of the message.
Only the lowest 7 bits are relevant.
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