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186 UDC 3300 Controller Product Manual 4/00
5.18 Digital Input Option (Remote Switching)
Introduction
The Digital Input option detects the state of external contacts for either of
two inputs. On contact closure, the controller will respond according to
how each digital input is configured. If the controller is configured for
either 2-loop or Cascade control, then switch #1 operates only on Loop 1
and switch #2 operates only on Loop 2.
Make your selection under the Option Set Up group function prompt
“DIG IN1” or “DIG IN2.” See Section 3 – Configuration .
Action on closure
Table 5-30 lists the configuration prompt selections, the “Action on
Closure,” and the display indication for each selection available.
Table 5-30 Digital Input Option Action on Contact Closure
DIG IN1 or
DIG IN2
Selections
Display Indication Action on Contact Closure
Returns (toggles) to original state when contact opens,
unless otherwise noted.
None
DI 1 2 always off* No Digital Input selection
*The Digital Input Annunciator will always show the Digital Input status.
TO MAN
MAN blinks Puts the controller into manual mode. Contact open returns the
controller to former mode unless MANUAL/AUTO
key is pressed
while digital input is active, then it stays in the manual mode.
TO LSP
Puts the controller into local setpoint 1. When contact opens, the
controller returns to former operation, local or remote setpoint, unless
the SETPOINT SELECT
key is pressed while digital input is active,
then it stays in the local setpoint mode.
TO 2SP
RSP annunciator blinks Puts the controller into local setpoint 2. When contact opens, the
controller returns to former operation, local or remote setpoint, unless
the SETPOINT SELECT
key is pressed while digital input is active,
then it stays in the local setpoint 2 mode.
TO 3SP
RSP annunciator blinks Puts the controller into local setpoint 3. When contact opens, the
controller returns to former operation, local or remote setpoint, unless
the SETPOINT SELECT
key is pressed while digital input is active,
then it stays in the local setpoint 3 mode.
TO DIR
Selects direct controller action.
ToHOLD
H blinks Suspends setpoint program or setpoint ramp operation. Contact open
runs the ramp/program from the Hold point unless the Ramp/Program
was not previously started via the RUN/HOLD
key. This selection
applies to either loop.
ToPID2
PIDSET 2 in lower
display
Selects PID set 2.
PV 2IN
II (II blinks)
IN
Selects the PV to equal Input 2.
PV 3IN
III (III blinks)
IN
Selects the PV to equal Input 3.
RERUN
Resets the Setpoint program back to the beginning of the first segment
in the program and leaves the program in the same Run or Hold mode
that it was in when the DI closed. Opening the DI has no further affect.