User Manual

Notes
13
MC19-1.20
Program setpoint (PSP)
Current Segment Type. Step and Call segments are instant, so are only flashed on the
screen, unless Holdback is operating on that segment.
Target Setpoint
Segment Rate For Rate, Time and Step segments only
Cycles left
Program Time Left
Program hold with holdback
If a holdback value has been set (see “Programming”) and the program goes into a hold
state, the green HLD indicator will flash, until the measured temperature catches up.
If while in this condition the program itself is put into hold by pressing the RUN/HLD button,
the “HLD” indicator will stop flashing and remain on with the “RUN” indicator. When the
program is started again by pressing the “RUN/HLD” button, the “HLD” indicator will flash
again if the measured temperature has not caught up with the program.
Programming note:
For P10 and P25 models you can create or change other programs while the current
program is running, go to operator Page 3.
5.11 Power Failure Recovery
If there is a power interruption to the controller during a program, when power is restored
the controller pauses the program, then ramps the temperature back up to the current
Program Setpoint (PSP) before continuing the program.
 Power fail during ramp segments: The ramp rate will be that of the current ramp
segment.
 Power fail during Dwell segments: The ramp rate will be that of the previous ramp
segment. If a previous ramp segment does not exist, then the dwell will continue at
the current measured temperature.
 Power fail during Time-to-target segments: The ramp rate will be that of the current
segment. The ramp rate is maintained, but the time remaining is recalculated.
If there is a power interruption while controlling to Setpoint, when power is restored the
controller automatically calls for maximum power.
5.12 Alarms
Alarms are used to alert the operator when a pre-set level has been exceeded or a function
error has occurred such as a sensor break. They are indicated by a flashing red ALM
(Alarm) indicator. The alarm may also switch an output – usually a relay to allow external
devices to operate when an alarm occurs. Alarms only operate if they have been configured
and are dependent on customer requirements.
How to acknowledge an alarm will depend on the type of latching which has been
configured. A non-latched alarm will reset itself when the alarm condition is removed. A
latched alarm requires acknowledgement with the “ACK” function (section 2.1) before it is
reset.
If an alarm has been activated the red “ALM” indicator will flash and the text will indicate the
type of alarm.
To acknowledge an alarm and cancel the “ALM” indicator, press and together.