Watlow Series 922 - Manual (Page 17)

Sample Program, Chapter 3
Sample Program
WATLOW Series 922 User's Manual
17
Running Your Program
1. Return to SYSTEM using the ENTER key at the RETURN prompt. Press
the RUN/HOLD key.
2. The 922 asks what FILE? to run. Enter (1) if it is not already entered.
3. The 922 asks what step you would like to start on. Again, press (1) if it is
not already there, and press ENTER.
The 922 quickly shows the step type and jumps to Step 1; the RUN LED is lit.
After each step is completed, the next step the 922 performs appears.
You may step through the parameters to see what the step type is and what
the parameters are set at by pressing the MODE key. The Time Remaining is
also displayed at the end of the menu. Once the Time Remaining reaches
00:00:00, it shows what step the profile has progressed to.
Editing Your Program
Now let's try editing the program by expanding it with another ramp and soak
step, and adding a jump loop. We'll jump to Step 1 and repeat Steps 1
through 6 two more times. This is accomplished by programming a Jump
Step (JS) = 1 and Jump Count (JC) = 2. This means that once the 922 goes
through the program and reaches Step 6, it jumps back to Step 1 and
repeats the program two more times.
By this time you should understand the basic concept of the Series 922 and
be able to get around on your own. Remember that the MODE key takes
you through the menus. Use the UP/DOWN keys to select parameters,
values and step types. Press ENTER and your information is entered.
1. Return to the PROGRAM menu.
2. Enter FILE? (1), Step (4). We are going to change this step type from a
STOP step to a SETPOINT step. This is our second ramp. Use Table 3
to enter values into the corresponding parameters.
3. Once you have edited your program, run it again and watch its progress.
FILE? STEP STEP SP1 HOUR MIN SEC EV1 EV2 JS JC
TYPE
1 4 SETPOINT 125 0 0 25 OFF ON - -
1 5 SETPOINT 125 0 0 25 OFF ON - -
1 6 JUMPLOOP - - - - - - 1 2
1 7 STOP
Table 3 -
Editing Your
Program,
Steps 4 - 7
125
100
75
50
25
0
Temp/ ° F
Time (seconds)
0 10 20 30 40 50 60 70 80 90 100
Step 1
Initializes
Set Point.
Step 2
Ramps
Step 3
Soaks
Step 6
Jumps to Step 1
and repeats
program twice.
(JC-2)
Edit Program
Step 4
Ramps Step 5
Soaks