User`s manual

Table Of Contents
535 User's Manual Chapter 7 85
Applications
other digital inputs.
MANUAL
Closing input trips the controller to manual. Opening input reverts
controller to automatic. Override by using MANUAL key, a commu-
nications command, or trip to automatic function.
2ND. SETPT.
Closing input changes active setpoint to the 2nd local setpoint. Open-
ing input reverts controller to previous setpoint digital input. Over-
ride by selecting a different setpoint via the SET PT key, a commu-
nications command, or other digital inputs.
2ND. PID
Closing input changes active set of PID values to 2nd set. Opening
input bases active set of PID on rules defined in PID TRIP and TRIP:1
to TRIP:8. Override input only by directly linking PID set to the ac-
tive setpoint and changing the active setpoint.
ALARM ACK.
Closing input acknowledges all active alarms. Opening input re-
arms the controller. If the digital input remains closed, it does not
continue to immediately acknowledge alarms as they become ac-
tive.
RST. INHBT.
Reset Inhibition. Closing input deactivates “I” (integral) term, regard-
less of the PID values being used. Opening input activates “I” term
(if applicable).
D.A./R.A.
Direct Acting/Reverse Acting. Closing input reverses action of the
first control output (from direct to reverse, or reverse to direct). Open-
ing reinstates original action.
STOP A/T
Closing input temporarily disables Adaptive Tuning. Opening input
enables it.
LOCK. MAN.
Closing contact places the controller in manual control at the desig-
nated output percentage. All locked manual contacts must be opened
in order to return controller to automatic control.
UP KEY / DOWN KEY
Closing the contact mimics the designated
or
key. Useful if con-
troller is mounted behind a window; contact push-buttons can be
used to change setpoint values.
DISP. KEY
Closing contact mimics the DISPLAY key; scroll through display of
the Setpoint, Deviation % and Output%.
FAST KEY
Closing contact mimics the FAST key . Use in conjunction with
,
, DISPLAY and MENU keys.
MENU KEY
Closing contact mimics the MENU key. In OPERATION Mode, pro-
vides entry to TUNING menu. In SET UP or TUNING Mode, ad-
NOTE: Only alarms configured to be
acknowledged are affected by this
digital input.
NOTE: The second display does not
change when tripping to manual from
a closed digital input.