To change the Time Variations in the Day and Night Cycle, change the Time Parameters
in P1 Step 2 and P1 Step 3. P1 Step 2 is set up for Day Cycle and P1 Step 3 is set up for
Night Cycle. Changing the amount of time affects the Run Time of the Step.
PROGRAMMING CONTROL TO RUN 12-HOUR DAY AND
12-HOUR NIGHT CYCLE AT TWO DIFFERENT SET POINTS
The Watlow PM can also be programmed to run at different Set Point Temperatures. The
following drawing “How To Enter The Parameters To Run A 12-Hour Day Cycle And 12-
Hour Night Cycle At Two Different Set
Point Temperatures.”
This program uses one (1) file and six (6) different Steps:
Step 1:
Is an unused Step and is reserved for starting the program at Specific Time.
Step 2:
Parameters are for entering the Set Point for the Day Cycle. (This Step uses
one (1) second of time.)
Step 3:
Parameters are how long the Day Cycle will run at Set Point from Step 2.
Step 4:
Parameters are entering the Set Point for the Night Cycle. (This Step also uses
one (1) second of time.)
Step 5:
Parameters are how long the Night Cycle will run at Set Point from Step 4.
Step 6:
Parameters are repeating the cycle (Jump-Looping) back to Step 2.
NOTE: Changing the amount of time in Step 3 and Step 5 also allows different time cycles in the
Day and Night Cycle, if desired.
