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Hello I need help with data table


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I tried to set up two separate tables, both with time and date strings.
In my project I need to show the time and date when I start the process and also the time and date at the end of the process.
I used the help and examples and got far but it doesn't work correctly.
It would be nice if, for example, if the process does not start, the windows appear empty and as soon as it starts the time and day appear and only at the end the end time and date appear.
I wasted hours on the project and it's difficult to understand the purpose of the tables
I greatly appreciate your help.
I speak English because I'm from Brazil and I use a translator

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image.png.ecc72c4caa402ecd2ee40a61465ff030.png

 

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  • MVP 2023

Unless you are keeping a log of all the recent start & stop times, you don't need to use Data Tables. Just store the start & stop times in MI vectors as a string using the RTC To ASCII FB. Then you can display the string or clear it out as desired.

If you are keeping a log, then create a Data Table with 2 columns of String property and store the Date & Time at the appropriate moment with a Write Row FB. It's easy to keep the most recent value at the top of the Data Table with the Copy Rows function to copy all the rows down 1 either just before or just after your write.

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1 hour ago, Flex727 said:

Não sei o que você quer dizer com isso. Não há problema em usar vários FBs de linha de gravação de tabela de dados ou em ter várias tabelas de dados, se for mais fácil.

 

1 hour ago, Flex727 said:

Não sei o que você quer dizer com isso. Não há problema em usar vários FBs de linha de gravação de tabela de dados ou em ter várias tabelas de dados, se for mais fácil.

Good afternoon, I'll show you what I'm doing

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58 minutes ago, Flex727 said:

All of that in the last message looked exactly right to me. What problem remains?

Flex I will redo it as you showed

# only record the beginning
time and date

 

writes every time pulse key updates line zero

image.png.180f970032e274fb3e4e410a37998cfe.png

 

but it doesn't update string

image.png.98116da0973226a650cd045811d8e346.png

 

image.png.a96b395252d26300b8a3c42b97add2b0.png

image.png.50d473da37e67d243b3821b4eba111f3.png

 

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know time is short but if you can help I would be grateful.
I tried some examples, watched videos and it even worked, but not as it should.
I'm kind of lost in addressing the write and read blocks in relation to reading the time and date clock

 

 

 

 

 

 

 

 

 

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On 01/10/2023 at 18:43, kratmel said:

Crie uma variável de temporizador na tela e selecione a opção necessária.

Temporizador_V130.jpg.9140d835ef6c8f958dffe790751d7b4d.jpg

 

 

5 hours ago, Flex727 said:

Não sei o que você quer dizer com isso. Não há problema em usar vários FBs de linha de gravação de tabela de dados ou em ter várias tabelas de dados, se for mais fácil.

I initially did as you showed me to continue development

image.png.c597453b4a3655c8a32d30d4be2cafc3.png

 

image.png.9c30e517a2f80a314201ad0d7c2aace8.png

 

Now I need to show finalized date and time values only when this occurs.
It could show dashes, figure or nothing or maybe show zeros

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  • MVP 2023
1 hour ago, roghenr said:

image.png.c597453b4a3655c8a32d30d4be2cafc3.png

No, MB 174 & MB 312 go in front of the Data Table Write Row FB. The RTC To ASCII FBs can just hang on the left rail to execute on every PLC scan.

Attach your program file here and I'll look at it. Also, describe exactly what it is you want the program to do - something like: I would like to record the start & stop times for the last 10 events and display the most recent (or selected) event on the screen.

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