• MESSAGE FORMAT FROM INSTRUMENT
The format of a message as sent from the instrument in response to a command from the master device is the following:
1. In case of commands that ask for transmission of a value (data request type):
SOH D d STX X .................. X ETX BCC
One byte S0H of start of message [ASCII 01].
Two address bytes.
One byte STX of start of text [ASCII 02].
N bytes corresponding to the requested value (including the sign and decimal point).
One byte ETX of end of text [ASCII 03].
One control byte BCC calculated with the method described in page 46.
2. In case of commands that do not imply the return of a value (command type or changing parameter):
D d ACK Ou D d NAK
The instrument sends a confirmation when it receives a message.
If the message has been correctly received and interpreted, the response will consist of two address bytes and one “ACK" [ASCII 06]
If the received message has not been well interpreted or it has been detected as to have errors, the response will be two address bytes and
a "NAK" [ASCII 21].
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