Dwyer 32A - Manual (Page 10)

Page 10
NOTATION CONVENTIONS FOR THE MENUS
Because of the number of features available in this control, information is included that may not apply
to your specific control. All usable features are included in this book, but may not be used in your
process. To increase clarity the following conventions are used:
1. Certain features, Menu Items, and functions shown in this book may or may not appear on your
control, depending on other Menu Item selections. At various places in the Menus there are notes iden-
tifying Menu Items that "control" or "direct" other menu items. If you are looking for a particular menu
item and can't find it, check the menu item that is its "control" for proper setting.
2. The "#" symbol is used in two ways. It is used inside a group of characters to indicate which set
point function (SP1 or SP2) is being affected. It is also used before a group of characters of a menu
item to indicate that there may be more than one selection or value for that menu item. This is used
for certain repeated items such as in the Ramp/Soak Program section.
3. Features that apply only to Options will be printed in Italics.
THE HOME DISPLAY
The home display is the normal display while the control is operating. If no errors or functions are
active, the HOME display will indicate the Process Variable (the temperature, pressure, flow, RH, etc.,
that is being measured) on the top display and the Set Variable (Set Point 1) on the bottom.
Items that can change the HOME display are the Auto/Manual function, the Prog function, the PctO
function, and any error message. Description of these special displays follow.
If Auto/Manual is enabled, the Manual indicator lights, and the home display is changed. The upper
display continues to show the Process Variable (PV), but the lower display changes to show the per-
centage of output in tenths of a percent to 99.9% (0.0 to 99.9), or 100 if 100%. The display digit to the
right of the number shows a flashing letter o to indicate that the value displayed is no longer the SV,
but percent output. The SP2 output is indicated by the use of an overline on the letter õ. Access to the
SP2 value is done by the INDEX key. See Auto/Manual Operation on Page 13 for further information.
If Prog is turned On, the HOME display changes the SV display from SP1to the Present Set Variable
as calculated by the Ramp/Soak Programmer function. See Programming and Operation for
Ramp/Soak Feature for more information.
If PctO (Secondary Menu) is turned On, the lower display changes to show the active percentage of
output as required to maintain SP1. The display is similar to the Auto/Manual display above, except
that the letter indicators do not flash, and the output is displayed in whole percentages of output, not
in tenths of a percent. If the control has both SP1 and SP2, the lower display will alternate between
the SP1 percent output and the SP2 percent output.
Error messages are listed on Page 33 and 34.