decimal to BCD

[ready961]

Im trying to set a timer in my automation direct DL-06 from my touch screen to 10 sec. But it seems that the number I put in is decimal and the timer reads in BCD/HEX. How do I do this?

 

[Keldog]

Could you but 10 in binary in '1010' instead of 10 decimal.

 

[ready961]

I need to type in 10 and have the timer come on for 10 seconds

 

[DanYost]

What touchscreen are you using?

 

[MarkTTU]

Can you change the data type on the button on your touch screen?

 

[ready961]

Its an ez touch. I can change the panel to hex but I want the operator to be able to type in decimal. Like if the want the timer to be on for 15 seconds they just type in 15.

 

[anks]

In direct logic....convert the data in to binary, then to BCD

 

[anks]

sorry undo what i said ...in EZtouch u have the option of feeding the numbers in BCD and Directlogic can take number in BCD as well....
dont give the i/p in unsigned decimal....use bcd format in ur hmi

 

[Tark]

You need to set the Tag in EZ-Touch to BCD_INT_16

Then you do the scaling with the object that you are using with that Tag. If you use a Numeric Entry object there is a tab for scaling. Or if you look on the General tab of the Numeric Entry object there is a section labeled "# Digits", here you can set the total digits and the fractional digits. In your case I would set the Total Digits to 3 and set the Fractional Digits to 1 and not mess with the Scaling tab. This will scale the timer value correctly.

 

[ready961]

Tark, Thanks this work the way I wanted. Now I want to enter in 1 into the panel and have it read 1.37 in the plc. Can I scale this in the panel? Who I need to readjust the decimal?

 

[MarkTTU]

If you want 1.37 in the PLC is it safe to assume you are dealing with real numbers? Or is this a number with two implied decimal points?

 

[Tark]

It depends on what you are trying to accomplish. I’m assuming you are still talking about timers. The value of a Timer (TMR) is 0 – 999.9 seconds, so if you are using this instruction then you set the Total Digits to 4 and the Fractional Digits to 1. If you are using a Timer Fast (TMRF), the value of this timer is 0 – 99.99, so you would set the Total Digits to 4 and the Fractional Digits to 2.

If you are looking to display a decimal point in a BCD value on the touch screen then you want to use the # Digits section. In other words the Timer value in the PLC shows 9999, but you want to show this value on the touch screen as 999.9, then use the # Digits section. If you need to do some scaling or some type of conversion, then you would use the Scaling tab. I generally don’t use the Scaling tab because I perform any required scaling in the PLC, this makes the PLC program easier to read and there is less confusion.