Watlow Series 1500 - Manual (Page 43)

Technical Reference
At the end of a program, or in a hatted condition, the Series 1500 wiIl continue to
hold set points and Event Outputs at the same states they were in at the end of the
final step or when the program was halted.
Example: If you press the RUN/HALT key at 1-1/2 minutes into a step, the control
would hold an oven at that step’s set points and Event states.
If you do not want the “final” step conditions to be retained at the end of a program,
add a step to establish stand-by set points with all Event Outputs OFF.
SP (Set Point) Step Programming
Enter set point data for both channels in this submode. The SP prompt sequence,
appearing in the FUNCTION display and listed below, will receive data in the DATA
display. Use the UP or DOWN key, then press ENTER. The processor advances
automatically to the next prompt.
To advance to the next prompt without entering data, press the FCTN key. The CHG
DATA flow diagram will assist you in the programming process.
1.
2.
3.
4.
l
5.
6.
7.
Sl (Channel 1 Set Point) Select the Channel 1 set point and press ENTER.
S2 (Channel 2 Set Point) Select the Channel 2 set point. Then press
ENTER.
El (Channel 1 Event Outputs) Select a 1, or a 0 for each the four
available events (1 = ON, 0 = OFF). The DATA display shows the 1 or 0 entry for
Events 4
l
through 1, from left to right. Press ENTER.
E2 (Channel 2 Event Outputs) Again, select a 1, or a 0 for each of the four
available events (1 = ON, 0 = OFF). The DATA display shows the 1 or 0 entry for
Events 4
l
through 1, from left to right. Press ENTER.
Note: If you’ve set DIP Switch #1 ON, then there are only three events
available for each channel. In that case each Event 4 is an alarm.
HR (Step Duration) Select hours, press ENTER. The prompt MN will
appear. Select minutes, press ENTER. The prompt SC will appear. Select
seconds, press ENTER. The step duration in hours, minutes and seconds will
appear in the FUNCTION and DATA displays. The TIME LED will be ON. Press
FCTN to proceed to the next prompt, NX.
NX (Next Step) This prompt will automatically take you to the next step in
sequence when you press ENTER. If, however, you want to go to a different
step, simply enter that Step # with the UP and DOWN keys and press ENTER.
Return to the SP, JL, WT, NX loop. The process begins over again; you
must choose the Step type before programming the step.
Set Point Ramping Conditions
When remembering any Set Point step, the Series 1500 notes what the existing
starting conditions are and what the desired ending conditions are. Then it follows a
linear path between the two.
Although the desired ending conditions are specifically programmed into each step,
the beginning conditions depend on the step the 1500 performed just previously.
Know where you are going and where you’ve been.
Programming, Chapter 4 WATLOW Series 1500 Manual 43