Watlow Series 920 Microprocessor-Based Ramping Control - Manual (Page 15)

4.
5.
6.
7.
Use the UP/DOWN keys to place hours into the display. The display will flash
until you press ENTER.
Press MODE to continue to the MIN parameter and press ENTER. Enter the cor-
rect value for minutes and press ENTER.
Press the MODE key several times to return to the top of the ACCESS (0) menu.
At the top of the ACCESS (0), which is the CALIB menu, you will see the Real
Time (Tl) displayed.
Continue to press MODE until you reach RETURN. Press ENTER to return to
SYSTEM.
Before Entering Your Program
Before we begin to program your Series 920, there are a few other initial SETUP
parameters to enter. Verify that DIP switch #7 is OFF. If you have not tried any
programming since your cold start, the C/F/U (Celsius/Fahrenheit/Units) and GS
(Guaranteed Soak) parameters are set to their appropriate values. Refer to the glos-
sary for a more detailed definition. If you have already tried stepping through the
parameters and entering values, it might be a good idea to go back and double check
to see that the values are correct.
1.
2.
3.
4.
5.
Press the MODE key until SETUP appears. Press ENTER. Once again you see
the ACCESS parameter. Use the UP/DOWN keys to enter (5) and press ENTER;
this is the Special Function (SPCLFUNC) menu.
Press MODE again until you see the C/F/U parameter. This parameter will defautt
to F. Use the UP/DOWN keys to enter degrees F (Fahrenheit). Press ENTER..
Continue through the SPCLFUNC menu until you see GS (Guaranteed Soak).
Enter a value of (0); press ENTER. This parameter has a default of 0.
Press the MODE key to move to the RETURN parameter. Press ENTER to return
to SYSTEM.
Good job! You have completed the initial setup, and are ready to program the 920.
Programming. File
1
Our first step in programming will be 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 pro-
grammed time. Step 4 will be a STOP step which signals the end of a file.
1.
2.
3.
From the SYSTEM menu, press MODE until you see the PROGRAM menu.
Press ENTER.
The Series 920 asks you for a FILE?. Your 920 should already say (I), but if you
have entered any values, it may be different. Make sure it says (1). Press ENTER.
Press the MODE key and you are asked for a STEP. ENTER (1) if it is not already
there.
NOTE:
When either the
hours or minutes are
entered, internal
seconds are set to 0.
NOTE:
DIP switch #7 must
be OFF to access all
SPCLFUNC parame-
ters.
Sample Program, Chapter 3
WATLOW Series 920 User’s Manual
15