User manual

UR3274U - User manual 21
. Digital Input Functions
Digital input is programmable for several functions which
are useful to simplify controller operability. Select the chosen
function on parameter 50
d Gt.i .
• Holdfunction(enabledbysetting L.c.n.o. or L.c.n.c. ) allows
to lock the reading of sensors when the digital input is ac-
tive (useful for wide ranging oscillation on less signicant
values). During the hold phase, display 2 ashes and shows
Lo ck .
• Enables/disablestheautotuningfunctionbydigitalinput
if the parameter
tune is set on man.
• Enableregulationwith rn.n.o. or rn.n.c.
• Switch fromautomatictomanual functioning if au.ma. is
set on
en. or en .st.
• Startofpre-programmedcycle(seepar.7.7)with st.st.
• Changesetpointfunction.
This function is useful where there are 2 to 4 working thres
holds required during system functioning without having
to press the arrow keys.
To enable the function use the parameter
o p.Mo. , by
selecting the number of setpoints desired (no. thresholds
switch). They can be switched during functioning by
pressing the
SET
key.