Computer Communication
Technical Handbook
019722-101 Rev. 05
79
SC-350/360
12.4 Logging Off
When communication between the computer and the machine has
finished, the machine should be “logged off”. This puts the machine
into the same state as when it is switched
On
. This is achieved by
sending the following message:
12.5 Reading Revision State for Software and
Protocol
Programs communicating with the SC-350/360 should always execute
this message to ensure compatibility. The revision states for the
software program and protocol are sent as four 8-bit numbers.
Example:
If the SC-350/360 would have a software revision state of 10.15 and a
protocol revision state of 2.09 then the following communication
would take place:
Future software and protocol revisions may not be fully compatible
and are only guaranteed to support the following three messages:
• ESC, “Q”, “F”
• ESC, “Q”, “Q” and
• ESC, “P”, “R”.
Computer (PC)
SC-350/360
–––––––
>
ESC
–––––––
>
“Q”
–––––––
>
“Q”
–––––––
>
(“Q” + “Q”) ^ FF
16
<–––––––
ACK (if check sum is correct) or NAK (if check sum is
incorrect)
Computer (PC)
SC-350/360
–––––––
>
ESC
–––––––
>
“P”
–––––––
>
“R”
<–––––––
Ex: 10
<–––––––
Ex: 15
<–––––––
Ex: 2
<–––––––
Ex: 9
<–––––––
(10 + 15 + 2 + 9) ^ FF
16
<–––––––
ACK
