Hi,

I am currently programming a DT85 to monitor several temperatures. I need to reference an alarm if any one of 8 temperature sensors are over X sensor + 45 deg. Basically I want:

IF (CV2 OR 3CV OR 4CV)>CV10 {1CV=1} ELSE {1CV=0} 
1CV IS ALARM STATUS 1 IS FOR ON 0 IS FOR OFF 2CV IS TEMP 2 3CV IS TEMP 3 4CV IS TEMP 4 10CV IS THE REFERENCED TEMP VALUE (5CV + 45)

Is there a guide to programming syntax?

Thanks,
jeremy

Hi Jeremy

You can achieve this using a boolean logic expression, e.g:

1cv=(2cv>10cv)or(3cv>10cv)or(4cv>10cv)

1cv will be set to 1 if the overall logical expression is true, otherwise 0.

Conditional expressions such as (2cv>10cv) return 1 if true, 0 if false. These subexpressions can then be combined using logical operators (and/or/not) or arithmetic operators (+/*/etc).

Cheers,
Jeremy

Hi Jeremy,

You can also achieve the same by chaining the If statements together with "or" statements, e.g.:

If(2CV>10CV)Or
If(3CV>10CV)Or
If(4CV>10CV)1CV

If any of the conditions are true then 1CV is set to 1. If they all fail then 1CV is set to 0

Cheers,
Roger

Hey how are you?

I'm writing a code where I also need to use IF and ELSE. I need to display a time of a 24h cycle which can be between 8am and 8am. That means I have to calculate my values in different ways, according of the time of day. To simplify, I just use 1-4.

For example, value 6 appears 3 times, it could be 6am today, 6pm or 6am the next day. So I tried:

Alarm1(1CV>24)"1" DO{2CV=1} 'after midnight (day2)
Alarm2(1CV<24)"2" DO{2CV=2} 'after 12am
Alarm3(1CV<16)"3" DO{2CV=3} 'after 8 in the morning day1
Alarm4(1CV<12)"4" DO{2CV=4} 'before 8 in the morning day1

3CV=2CV

My problem is, that in 3CV is returned every time the value 4, even if the value is bigger than 12.

Any ideas?

Regards,
Thorsten

Good morning Thorsten,

You have a programming error. You are over riding your alarms with the Do statement. A Do statement is an unconditional alarm so 2CV will always equal 4

You currently have:

Alarm1(1CV>24)"1" DO{2CV=1}

which is two commands

Alarm1(1CV>24)"1"
DO{2CV=1}

The correct syntax for the alarm:

Alarm1(1CV>24)"1"{2CV=1}

Cheers,
Roger

Hi

Can someone tell me whats went wrong in following sentence?

IF(11CV!=10CV) AND IF(1DS==0){11CV=10CV 1CV=1}

I try to use it in DT80's manual channel

Thanks,
Markku

Good morning Markku,

You have a space between the close bracket and the AND. Try this:

IF(11CV!=10CV)AND IF(1DS==0){11CV=10CV 1CV=1}

Cheers,
Roger

Thank you Roger,

I noticed it also myself after several hours...

Markku