QUOTE (gjels @ Feb 9 2009, 08:04 AM)
I check this and made a test. I still do not get a reply from the instrument.
I have to sent a 4 letter ASCII code to the instrument doing this dioes not give any data back. Below is shown how the command has to be sent. I think that it is the way I am sending the break signal which might be the problem. But I kown very little about serial communication so I can not see what I might be doing wrong.
____________________
In order to communicate with the network-connected HD2003 units, the Host Master Computer has
to respect a prefixed protocol:
1. Through the transmitted command, it has to specify the address (Identicode) that univocally
identifies the unit to which the command refers.
2. Before sending the command, the Host Master Computer has to force the transmission line into
the Clearing Mode (Break Signal) for 2ms, at least, returning then to the Marking Mode (rest
condition).
3.The command is made up by 4 ASCII characters:
M<ID><x><x>
__________
-Gjels