Control Mode Status; Setpoint Display - Aalborg Command Module Operating Manual

The Main Display will indicate the following info:
= "F" current flow rate in % F.S. (NOTE: An "I" is indicated on the display
immediately following the displayed flow when the SDPROC is set for internal
reference and "E" for external reference.)
= "S" current set point in % F.S.
= "V" valve status by displaying a "CLS" for CLOSE, "OPN" for OPEN or
"AUT" for AUTO.
= "A" alarm status by displaying a "D" for disabled, "N" for no alarm events,
"L" for Low alarm and "H" for High alarm.
= "TOTAL" totalizer reading in current (volume/mass based) Engineering Units.
Readings are linear 0 to 100% of full scale. Direct engineering units are available on anoth-
er screen. A proportionally linear 0 to 5 VDC or 4 to 20 mA output signal may be moni-
tored simultaneously at the 25 pin "D" connector at the rear of the SDPROC (see section
b.2.4). Press the Down button under the Main Display screen, to set the GENERAL,
ALARM, TOTALIZER and PROGRAM settings (see section e.2.6).
e.2.3 Control Mode Status
There are three modes of operation that the mass flow controller can be set for. CLOSE
will shut off the power to the mass flow controller valve, allowing the valve to mechan-
ically close. OPEN will provide maximum power to the valve to allow it to open fully.
This mode is used when there is a need to purge the gas flow system. AUTO mode will
allow the mass flow controller to maintain a given flow as set by the user. In order to
change mode of operation press the Esc button from the Main Screen. The following
display will appear.
To operate the mass flow controller in CLOSE, OPEN or AUTO modes, press the button
(UP, DOWN, ENTER respectively) directly below the mode shown on the display (see
section e.4.2). After pressing the button the Main Display will appear and indicate the
current valve status by displaying a "CLS" for CLOSE, "OPN" for OPEN, or "AUT" for
AUTO shown after the set point value.
Press the ENTER button under the Main Display screen, to set the desired flow for
AUTO control.
e.2.4 Setpoint Display
The following display is shown when adjustments to the set point reference signal
are desired.
Valve Control Display for 1 channel SDPROC
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