Apex Digital PC - Streaming Mode; Taring; Collecting Data

2021.08.19  REV.   PRESSURE CONTROLLER OPERATING MANUAL 21
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 (page 18). 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 automatically sends a line of live data at regular intervals. Only one unit on a  port
may be in streaming mode at a time.
To put your pressure 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 device 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 unreadable. 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 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)
Taring
Taring pressure ensures that the gauge or dierential pressure sensor reads zero. Taring an absolute pressure sensor
requires a barometer and aligns the absolute pressure sensor with the external barometric pressure. For an accurate
tare, a gauge or absolute pressure sensor must be open to atmosphere, while both ports of a dierential sensor must
be connected to the same pressure source (which may be atmosphere).
To tare a gauge or dierential pressure device:
Tare gauge pressure: [unit ID]p
Example: ap
To tare an absolute pressure device
Tare absolute pressure: [unit ID]pc

Example: apc
Absolute pressure devices will return a
? if the device is not configured with an internal barometer.
Collecting Data
Collect live data by typing the [unit ID] command or by setting your pressure controller to streaming. Each line of
data for live measurements appears in the format below, but the unit ID is not present in streaming mode.
Example:
A +20.00 +20.00
ID Gauge Pressure Setpoint
Single spaces separate each parameter, and each value is displayed in the chosen device engineering units (page 17).
You can query the engineering units of the serial data frame by typing:
Query live data info: [unit ID]??d*

Example: a??d*
  (returns the data frame descriptions)
Additional columns, including status codes (page 6), may be present after the last number. The unit ID (page 18)
appears in the data frame only when the device is in polling mode.