Rion VM-83, Instruction Manual, Page: 60 / 106

50
Serial Interface
Transfer protocol
Sending of commands
In order to control the VM-83 from a computer or to retrieve measurement
data, certain commands must be sent to the VM-83. The data exchange must
be performed according to certain rules, to ensure that both the VM-83 and
the computer recognize the commands and data properly.
To send commands to the VM-83, the following procedure must be observed.
The following explanation assumes that the preparations described on page
49 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 VM-83.
2. When RMT1 <
CR
><
LF
> has been received, the VM-83 returns
<
ACK
>READY<
CR
><
LF
> to the computer. The link is now estab-
lished, and the indication REMOTE appears on the display of the
VM-83.
3. To change a setting at the VM-83, the computer sends (setting com-
mand) <
CR
><
LF
> to the VM-83.
4. When a valid setting command is received by the VM-83, it carries
out the respective processing steps. When these are completed suc-
cessfully, the VM-83 returns an <
ACK
>READY<
CR
><
LF
> to the
computer.
5. To receive data, the computer sends (data request command) <
CR
><
LF
>
to the VM-83.
6. When the VM-83 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 VM-83.