Technical Reference
44 WATLOW Series 1500 User's Manual Programming, Chapter 4
Here's an example:
• You start a Step #4 at 400° (Step #3's set point), and ramp uniformly down to
275° (Step 4's set point).
• If you "loop back" from Step #6, your starting point will be the Step #6 set point
and not the Step #3 set point. You will be ramping to 275° from a different
starting point.
• You might want to jump back to an earlier step to reach a full 400° through Step
#3 before you start Step #4. Read on for more about Jump Steps…

JL (Jump Loop) Step Programming

In this submode you'll program the step # to be jumped to (JS) and the number of
jumps to be performed (JC). The most common Jump Loops are backward jumps,
that is, jumping to steps already performed. You can also program a forward jump,
but from there you cannot loop back.
"Nested loops" or "intertwined loops" are not acceptable. An example of an inter-
twined loop is a sequence with Steps 1, 2 , 3, 4 and 7 programmed as regular Set
Point steps; Step 5 as a jump to Step 1 and Step 6 as a jump to Step 2. The proces-
sor never reaches Step 7. See the example below.
Use simple loops in your programs. You'll find hints to programming below.
•JS (Jump Step) selects the step to jump to, press ENTER.
•JC (Jump Count) selects the number of times this loop is to run, press ENTER.
• For NX (Next Step), press ENTER to go to the next step, or select any step.
Any value from 1 to 255 can be used in loops of this type.
If you program "0" into "JC," the JUMP is always performed. If the jump is back-
wards, this will be a never-ending loop. Or set up a one-time "unconditional jump"
with a forward jump. By ending each section with a Jump Step, you can easily alter a
program to perform various sections in different sequences.
• During programming work, you may want to develop and test a program in
sections. Develop the separate sections with unprogrammed Blank Steps
between them, then unite the separate sections later with Jump Steps.
As you learned earlier, jumping or looping into Steps from "different directions" can
sometimes cause unexpected results due to different starting conditions as you enter
a new step. Watch for such possibilities.
Jump Loop Step
Step 1 Set Point
Step 2 Set Point
Step 3 Set Point
Step 4 Set Point
Step 5 JS - 01
Step 6 JS - 02
Step 7 Set Point