CCWKen
04-19-2007, 12:34 AM
I'm having a problem understanding J1 and J2 parameters. (Address 0001)
When AH > AL, Relay activates at AH and deactivates at AL.
When AH < AL, Relay activates at AH and deactivates at AL.
So what's the difference? I must be making more out of this than I need but I'm confused about how the PID determines which is upper and lower limit alarm.
I want to set these up as triggers for preheating--All coils hot until target temp reached, then drop back to maintainer coil only (SSR).
When AH > AL, Relay activates at AH and deactivates at AL.
When AH < AL, Relay activates at AH and deactivates at AL.
So what's the difference? I must be making more out of this than I need but I'm confused about how the PID determines which is upper and lower limit alarm.
I want to set these up as triggers for preheating--All coils hot until target temp reached, then drop back to maintainer coil only (SSR).