Watlow Series 922 - Manual (Page 16)

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WATLOW Series 922 User's Manual Sample Program, Chapter 3
Sample Program
Skip Step 3 if you do not have an external event board connected.
3. Continue through the menu with the MODE key until you see AUX1. Use the
UP/DOWN keys to enter AUX1 as an event (EV) and press ENTER. Do the
same for AUX2. Default is AL (Alarm).
4. Continue through the SPCLFUNC menu until you see GS (Guaranteed
Soak). Enter a value of (0); press ENTER. This parameter defaults to 0.
5. Press the MODE key to move to the RETURN parameter. Press ENTER to
return to SYSTEM.
Table 2 -
Series 922
Ramp and Soak
Program
Programming File 1
Our first step in programming is to make a short ramp and soak program. Step 1
initializes the set point to a known starting point for the ramp, Step 2 is a short
ramp, Step 3 is a soak step, which holds the programmed set point constant for
the programmed time. Step 4 is a STOP step which signals the end of a file.
1. From the SYSTEM menu, press MODE until you see the PROGRAM menu.
Press ENTER.
2. The Series 922 asks you for a FILE?. Your 922 should already say (1), but if
you have entered any values, it may be different. Make sure it says (1).
Press ENTER.
3. The display now shows STEP with a 1 flashing. Use the UP/DOWN keys to
select (1) then press ENTER if it is not already there.
4. Press the MODE key. Use the UP/DOWN keys to select the step type and
values. Press ENTER. Use Table 2 to enter the corresponding parameters
and values. The parameters appear from left to right on the table.
At the end of each menu, rather than press ENTER at the RETURN parameter to
get to SYSTEM, press MODE for the STEP prompt. The step number automati-
cally increments and flashes. Press ENTER.
FILE? STEP STEP SP1 HOUR MIN SEC EV1 EV2
TYPE
1 1 SETPOINT 75 0 0 1 OFF OFF
1 2 SETPOINT 100 0 0 25 ON OFF
1 3 SETPOINT 100 0 0 25 ON OFF
1 4 STOP
NOTE: Step 4 must
be entered as a step
even though it
defaults to a STOP
step.
NOTE: EV1 and
EV2 will not
appear unless the
Event Output
board is con-
nected, and AUX1
and 2 are events.
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.