Watlow Series SD31 PID with Optional Countdown Timer User Manual

Page 40

Wa t l o w S e r i e s S D 3 1

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C h a p t e r 8 Ti m e r

Prompt

Timer Related Settings

Timer Set Point

[ti;SP]

[ti.SP]

[~Off] Set Point Off - The normal
control set point will continue to
be displayed, but the SD31 will
use a set point of "Off" during the
timing sequence.

[trAc] Set Point Tracking - Uses
the same set point both in and out
of the timer sequence.

[Pre;S] Preset Set Point - Allows
programming of a set point for use
in the timer sequence and a sepa-
rate set point for use outside of the
timer sequence.

Preset

• SP is used when not timing
• Preset is used during the timer sequence

Ready Band Value

{~rdy}

[ rdY]

Select the acceptable +/- range for
process value deviation from the
set point and still be considered in
a ready status. If enabled, the Rdy
LED is lit when the process value
is within the ready band range of
the set point. The Ready band is
also linked to the Ready and
Ready with Acknowledge timer
methods, to limit timer countdown
to within the ready band.

RDY

Ready Light Enable

{rdy;L}

[rdY.L]

Set to

{~~On] to enable the light-

ing of the Ready Light when the
process temperature is within the
Ready Band window.

Output1 or Output 2 Function

{~Ot1} , {~Ot2}

[ Ot1], [ Ot2]

Set Output 1 or Output 2 to timer,
[tiM] , to designate an output as
a timer output. This allows the
timer sequence to manipulate the
output's state.