Watlow Series 922 - Manual (Page 14)

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WATLOW Series 922 User's Manual Sample Program, Chapter 3
Sample Program
Chapter 3
Learning the Series 922 -
A Sample Program in Action
This chapter will guide you through an easy sample program for the Series
922. You can quickly grasp the necessary terms and concepts by entering
values and then observing this exercise.
If you feel that your knowledge of ramping controllers does not require a
sample program to learn the Series 922, skip this chapter.
A Brief Overview
This sample program teaches you the fundamentals of creating a ramping
profile, along with ways to expand that profile to its greatest versatility.
The program example starts with a simple ramp and soak profile. A "ramp"
progresses from one set point to another set point over a period of time.
Soaking controls the length of time the temperature holds at this level.
We then expand it to multiple ramp and soaks, add JUMPLOOP functions,
perform an AUTOSTART, LINK to another profile, and finally perform a
WAITFOR step.
This sample program only goes through the steps of programming
Channel 1 of the Series 922. The process for Channel 2 is the same.
Events 3 through 8 are not shown.
At this point make copies of your Master Step Chart on Page 62. It is a good
practice to keep track of your program as you go. It's also a good idea to sit
down and define exactly what you want your program to do.
Clear Memory, Set DIP Switches
If you haven't already cleared your Series 922's memory, do a "Cold Start."
Turn the power OFF, open the 922 and ensure that DIP Switch #1 is ON.
Apply power momentarily and reset DIP Switch #1 to OFF. The program
memory is now cleared. If you haven't done so already, attach your sensor as
described in Chapter 4.
WARNING:
Doing a cold
start will cause
all SETUP
parameters and
files to be lost.
DO NOT put DIP
switch #1 in the
one position
unless all user
programmed
information is to
be cleared.