Alicat MC Series Mass Flow Controller - Manual (Page 18)

18
CONTROL SETUP
Control Setup is accessed by pressing the button below Control Setup on the
Select Menu display. From this screen you can select your set-point source,
choose a loop variable and adjust the PID terms.
Press BACK to return to the Select Menu
display.
Press MAIN to return to the MAIN display
SETPT SOURCE – Pressing the button
above SETPT SOURCE will allow you to
select how the set point will be conveyed
to your controller.
Use the line-up and line-down buttons
to move the arrow in front of the desired
option. Then press SET.
Press CANCEL to return to the previous
display.
The controller will ignore any set-point
except that of the selected set-point source and it will remember which input is
selected even if the power is disconnected.
RS-232 (or RS-485) refers to a remote
digital RS-232 / RS-485 set-point applied
via a serial connection to a computer or
PLC as described in the installation and
RS-232 / RS-485 sections of this manual.
Front Panel refers to a set-point applied
directly at the controller.
Front Panel input must be selected
prior to changing the set-point at
the device.
Analog refers to a remote analog set-
point applied to Pin 4 of the Mini-DIN
connector as described in the installation
section of this manual. The standard analog input is 0-5 Vdc.
To determine what type of analog set-point your controller has, refer to
the Calibration Data Sheet that was included with your controller.
If nothing is connected to Pin 4, and the controller is set for analog control, the
device will generate random set-point values.
NOTE: If your controller has the IPC (Integrated Potentiometer Control) option,
the IPC dial will operate with the ANALOG set-point source selected.
SETPT refers to the set-point. This parameter may be changed using the display
only if FRONT PANEL is selected as the Input. Press SETPT. Then use SELECT to
choose the decimal with the arrow and the UP and DOWN buttons to change
the value. Press SET to record your value. Press CLEAR to return to zero.
LN-DN
CANCEL SET
LN-UP
>RS232
FRONT PANEL
ANALOG
LOOP
VAR
ON
AUTO PID MAIN
SETPT
SOURCE
SETPT
+0.0