Ramp Dwell Programming
11
MC16-EN– 1.04
5.4
Resetting The Timer
When the Timer count has ended or the timer is paused.
Start at the Home display
Press and hold the
Timer
key for 1.5 seconds
rst
is displayed to indicate timer reset.
5.5
Timer Function Description
The 301 controller has an in-built timer, which can be set to one of five types:
Timer Type
t1
On pressing the
Timer
key; Timer Type 1 waits for the setpoint to be reached, then
begins the countdown. On completion of the countdown, the furnace or oven
switches the power off to the elements (End flashes on the display).
Timer Type
t2
On pressing the
Timer
key; Timer Type 2 starts the countdown immediately. On
completion of the countdown, the furnace or oven switches the power off to the
elements (End flashes on the display).
Timer Type
t3
On pressing the
Timer
key; Timer Type 3 immediately switches the furnace or oven
off and starts to countdown. On completion of the countdown, the furnace or oven
switches the power on to the elements.
Timer Type
t4
On pressing the
Timer
key; Timer Type 4 waits for the setpoint to be reached then
begins the countdown. On completion of the countdown, the furnace or oven
continues to control as normal (End flashes on the display).
Timer Type
t5
On pressing the
Timer
key; Timer Type 5 starts the countdown immediately. On
completion of the countdown, the furnace or oven continues to control as normal
(End flashes on the display).
5.6
The Timer Temperature Band
Timer type
t1
or
t4
starts the count down when the setpoint temperature is reached. It is
possible to set the timer going before setpoint is reached by adjustment of the timer
temperature band
t.bnd
. e.g.
t.bnd
set to a value of 3 will result in the timer starting to count
down 3°C before the temperature setpoint is reached. This is practically useful when
furnaces or ovens that take a long time to reach setpoint are at a sufficiently high
temperature for a given customer process to occur.
Hold
