Watlow Series 942 - Manual (Page 38)

Sample Program
38
WATLOW Series 942 User's Manual Programming, Chapter 5
Running Your Profile
1. Start your profile by pressing the HOLD/RUN key. You can be at any point
except the Setup menu.
2. The RUN LED begins flashing. The upper display shows the step to begin on,
and the bottom display shows the StEP parameter.
3. Press the HOLD/RUN key again. If not pressed within approximately 1 minute,
the RUN procedure will abort. The profile starts running.
125
100
75
50
25
0
Temp/ ° F
Time (seconds)
0 5 10 15 20 25 30 35 40 45 50
Step 1
Initializes
Set Point.
Step 2
Ramps from
75 to 100 ° F.
Step 3
A soak step
holds set
point at 75 ° F.
Step 4
A stop step.
Step 3
A soak step
holds set
point at 100 ° F.
Step 4
An end step.
Programming a Ramping Profile
Our first step in programming is to make a short ramp and soak profile. Step 1
initializes the set point to a known starting point for the ramp, Step 2 is a short ramp,
and Step 3 is a soak step, which holds the programmed set point constant for the
programmed time. Step 4 is an end step signalling the end of the profile.
1. When the lower display reads set point, press MODE once and you see the Prog
parameter. Select YES in the upper display. Press the MODE key once again.
2. The Series 942 asks you for a StEP. The upper display reads (1).
3. Press the MODE key and you are asked for a step type (StYP). The default is
End. Use the UP/DOWN keys to select StPt (set point) then press MODE if it is
not already there.
4. Use Table 4 to enter the corresponding parameters and values. The parameters
appear from left to right on the table. Remember that the MODE key is used to
progress through the menu, and the UP/DOWN keys are used to select param-
eters and values.
This is a sample program. Depending on your application and
parameter settings, your system may not respond like this.
StEP StYP SP HOUr Min SEC Ent1 Ent2 End rtn
(Step Type) (Set Point)
1 StPt 75 0 0 1 OFF OFF -- nO
2 StPt 100 0 0 25 On OFF -- nO
3 SoAh -- 0 0 25 On OFF -- nO
4 End OFF YES
Table 4 -
Series 942
Ramp and
Soak Profile
NOTE:
If auxiliary
outputs are not
present or Ot3 and
Ot4 are selected
as alarms, the
Ent1 and Ent2
parameters will
not appear in the
program menu.