Manual

Sample Program, Chapter 2
Sample Program
WATLOW Series 1500 User's Manual 25
However, remember that Step #1 is programmed as a "Wait Step," so it will wait until
the same time tomorrow. Since you now know what a Wait Step does, you may want
to reprogram Step #1 as a simple "Set Point" step so that you can view the Recycle
action. If you do decide to reprogram Step #1, then read the following items.
• You cannot alter data or parameters while the program is running. The
1500 must be in the HALT condition.
• If you want to move to a different Step #, to see what is programmed there
and then modify that step, enter the CHG DATA mode. Then to re-
program it from the CHG DATA mode, go to the appropriate step as de-
scribed above. Then press the CLEAR key. All programmed data (for this
step only) will clear, and you can now reprogram it.
6. Interactive Changing of Set Points and Events
When in the halted condition, the Series 1500 actively maintains the current set
points and Event Output status. At times, you may wish to change these conditions
without actually entering and running a profile step. To do this, you must be in the
"MONITOR DATA" mode, halted (PROG HALT LED ON) and "RESTART" key just
pressed. Then use the function key to move to the desired prompt ("C1", "C2", "E1"
or "E2"), use the INCREMENT/DECREMENT keys to move to the desired data, and
press the ENTER key. The Series 1500 will quickly change to controlling at the new
condition.
Where To Go From Here
As soon as you feel comfortable with the Series 1500 sample program, move on to
Installation and Wiring, Chapter 3. Or if you have already installed and wired your
system, go to the Programming Chart in Chapter 4 and begin entering and docu-
menting your Series 1500 program.