PRESSURE CONTROLLER operating manual
33
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Note:
In what follows,
indicates an ASCII carriage return
(decimal 13, hexadecimal D). For many devices, this is the same
as hitting the Enter key. Serial commands are not case-sensitive.
Polling Mode
Your controller is shipped in polling mode with a unit ID of
A
, unless
requested otherwise. Each poll returns one line of data every time you
request it. To poll, simply enter its unit ID.
Poll the device:
[unit ID]
Example:
a
(polls unit A)
You can change the unit ID of a polling device by typing:
Change the unit ID:
[current unit ID]
@=
[desired unit ID]
Example:
a@=b
(changes unit A to unit B)
The front panel menu can also be used to change the unit ID:
MENU
→
ADV
SETUP
→
COMM SETUP
→
UNIT ID
(
). Valid IDs are letters A–Z,
and up to 26 devices may be connected at a time, as long as each unit
ID is unique.
Streaming Mode
In streaming mode, your device continuously and automatically sends a
line of live data at regular intervals. Only one unit on a COM port may be
in streaming mode at a time.
To put your flow controller into streaming mode, type:
Begin streaming:
[unit ID]
@=@
Example:
A@=@
(Begins streaming unit A)
This is equivalent to changing the unit ID to “
@
”. To take the flow controller
out of streaming mode, assign it a unit ID by typing:
Stop streaming:
@@=
[desired unit ID]
Example:
@@=a
(stops and assigns unit ID of A)
When sending a command in streaming mode, the flow of data will not
stop while the user is typing. This may make the commands you type
illegible. If the device does not receive a valid command, the command
will be ignored. If in doubt, simply hit
and start again.
Note:
The default streaming interval is 50 ms, but this can be modified
by editing Register 91 while the device is in polling mode:
Set streaming interval:
[unit ID]
w91=
[time in milliseconds]
Example:
aw91=500
(streams data every 500 ms)
