Hi,

I have compiled the following piece of code using Delogger Pro to actuate a relay when alarm conditions are met in 50CV and in 15CV 16CV & 17CV and I have grouped the three CVs together as in start channel 15 end channel 17CV.

Is this correct that the alarm will be true if the 50CV is met and less than 16C in the further 3 CVs individually or should I separate the 3 CVs and put an alarm on each.

ALARM3(50CV("ROOM AVE")<16.)AND ALARM4(15..17CV("HEAT ON%")<16.)7DSO"HEATING ON"{[=1]}

Also is it ok to use solid state relays powered and controlled by the DT800 to switch plant.

Stephen.

Good morning Stephen,

You will need to separate out the CV's, one per alarm.

I would also recommend that you use a relay rather than a solid state relay. I have seen the solid state ones leak voltages and affect the switching.

Cheers,
Roger