Engaging Both Pre-Tune And Rapid Features; Indication Of Pre-Tune And Rapid Status - Honeywell DCP 50 Product Manual

NOTE: The Pre-Tune facility will not engage if (a) a program is currently running,
(b) the process variable is within 5% of input span of the setpoint, or (c) an
erroneous key sequence is used. Pre-Tune is a single-shot process which
automatically dis-engages itself when completed.
1.9

ENGAGING BOTH PRE-TUNE AND RaPID FEATURES

The Pre-Tune and RaPID features can be
engaged in one key action sequence
(see right). Pre-Tune will operate first. When
it is completed it will dis-engage itself and
the RaPID feature will then operate
automatically.
1.10

INDICATION OF PRE-TUNE AND RaPID STATUS

The responses to the RaPID feature being engaged are:
Pre-Tune Status
Not operational.
Operational.
The responses to the RaPID feature being dis-engaged are:
Pre-Tune Status
Not operational.
Operational.
The responses to Pre-Tune being engaged are:
RaPID status
Not operational.
Operational.
1-5
Response
RaPID activated.
Pre-Tune completes routine,
then RaPID activated.
Response
RaPID de-activated.
Pre-Tune completes routine,
then RaPID de-activated -
return to normal control.
Response
Pre-Tune activated and
routine completed
RaPID interrupted, Pre-Tune
activated. Pre-Tune completes
routine, then RaPID control
resumed.
Indication
AT
indicator goes ON.
AT
indicator flashes at double
rate then comes ON.
Indication
AT
indicator goes OFF.
AT
indicator flashes at
double rate then goes OFF.
Indication
AT
indicator flashes at
normal rate the goes OFF.
AT
indicator flashes at
double rate then goes ON.