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[bigmaq]

What is the priority if I set AL2 = 100 in the Parameter setting vs programming a Special Event to turn on AL2 (e.g., C03 = 500, T03 = -34 and Hy = 0.3).  Do I need to set AL2= -1999 if I want AL2 to turn on only during a Special Event?

Also, if, during a debugging process, I Stop the program (or even if I shut down the PID) before it reaches Special Event T05 = -161, will the AL2 stay on when I re-Run or power up?

[bigmaq]

Sorry, I meant to say ALM2 instead of AL2 relay.

[bigmaq]

and SE T05 value is -156 rather than -161 (AL2 off = 5x30+6)

C03 = 500, T03 -34 (turn ON AL2)
C04 = 500, T04 = 1 (soak at 500 for 1min)
C05 = 500, T05 = -156 (turn OFF AL2)
C06 = 600, T06 = 3 (soak at 600 for 3 min)
C07 = 600, T07 = -121 (END program)

[Kkane]

ALM2 relay can be triggered by temperature alarm and also special events. If the ALM2 relay is turned on by temperature alarm already, the alarm will remain activated if you force it to turn on via special event. I don't have the information for its polarity. If you are interested, please do some tests on your end and report your findings here.

If you don't want to use ALM2 relay for temperature alarm but only use it for special events, yes, you can set AL2 to a very lower number, and also confirm Hy-1, Hy-2 to a very large number (to disable derivation alarm).

By your provided program, you force to turn on alarm 2 on step 3, so if you STOP the program during step 4, the alarm 2 should remain activated (if your temperature alarm is not triggered during this time). By the timer you set for step 4 (T04 = 1), you only have one minute to stop the program, otherwise it will go to step 5.