61
Serial Interface
Transfer Sequence
Sending of commands
In order to control the NA-42 from a computer or to retrieve measurement
data, certain commands must be sent to the NA-42. The data exchange must
be performed according to certain rules, to ensure that both the NA-42 and
the computer recognize the commands and data properly.
To send commands to the NA-42, the following procedure must be ob-
served.
The following explanation assumes that the preparations described on page
13 have been completed.
** stands for the ID number.
Example: If the ID number 0 is set,
**
stands for 00.
1. The computer sends RMT1
**
<
CR
><
LF
> to the NA-42.
2. When RMT1
**
<
CR
><
LF
> has been received, the NA-42 returns
<
ACK
>READY<
CR
><
LF
> to the computer. The link is now estab-
lished, and the indication REMOTE appears on the display of the
NA-42.
3. To change a setting at the NA-42, the computer sends (setting com-
mand) <
CR
><
LF
> to the NA-42.
4. When a valid setting command is received by the NA-42, it carries
out the respective processing steps. When these are completed suc-
cessfully, the NA-42 returns an <
ACK
>READY<
CR
><
LF
> to the
computer.
5. To receive data, the computer sends (data request command) <
CR
><
LF
>
to the NA-42.
6. When the NA-42 receives a command which requests data, it carries
out the respective processing steps and sends (data) <
EOT
><
CR
><
LF
>
to the computer.
7. To terminate the link, the computer sends RMT0
**
<
CR
><
LF
> to
the NA-42.
Summary of Contents for NA-42
Page 2: ......
Page 10: ...viii...
Page 113: ...103 Technical Reference Main menu screen Measurement screen...
Page 122: ...No 32342 06 12 Printed in Japan...
