[How do you reset a timer while it is running?]

13 hours ago, Joe Tauser said:

1.  Remove power from it's coil

I can build a network in U90 Ladder that would accomplish this for one cycle, but it seems clumbersome...

13 hours ago, Joe Tauser said:

2.  Use a Reset coil  -(R)  assigned to the timer's address.  If the timer is enabled and running it will reset its accumulator to 0.

U90 Ladder doesn't allow me to use a Reset coil on T(imers). Only on MB, O and SB... or is there a trick I am missing?

[How do you reset a timer while it is running?]

When looking at the 'How Timers work' page of the U90 Ladder help, the term 'Timer Reset' is mentioned. I am however unable to figure out how I would use this.

How do I reset a timer (that is running)?

["Invalid procedure or argument" when I try to communicate with JZ20-R31]

I have the same problem with the "5 error". I have found the following workaround:

1. "Create a Download file" from U90 Ladder (a D90 file)

2. Use this D90 file to create an UDC file with the Download Designer

3. Use UDC file with the Download Manager to get the program into a Jazz.

This works for me (although it is a bit of a hassle).

[Feature request, allow export STL]

The easiest way I have found to compare two projects is to print the STL to pdf for both projects. Open each pdf, select everything and copy-paste it into a text editor (I use Notepad++). Then I remove the line numbers from the text using regular expressions. Finally I compare the resulting texts.

 

[Detecting MODBUS with Jazz]

Both SB 60 and SB 66 do not respond to modbus being read... I do however notice that SB 67 does seem to respond. I am unable to find documentation that tells me what that address does. Does anybody know where I could find that documentation?

[Error codes]

A Jazz we had in the field came back displaying an error code: BFLT Err @ 31 (and then some hex-code). Where can I find out what this means?

[Detecting MODBUS with Jazz]

I have a Jazz as a MODBUS slave. Is there a way to detect whether the MODBUS master is communicating with the jazz from within the Jazz?

[Long integer documentation error?]

The documentation on the long integer store function says: " Setting SB82 before a Store function causes the 'A' value to be treated as a 32-bit 'long' value; the long value is then broken up into the 2 16-bit MIs constituting the 'B' value.  Resetting SB82 before a Store function causes the 'A' value to be treated as a 2 16-bit values; the values are then stored as a long 32-bit 'B' value. " (see http://www.unitronics.com/KnowledgeBase/U90Ladder/Ladder/Functions/Special_functions/_Long__Integer_functions.htm)

I have tried this, but it seems to me that the JAZZ does exactly the opposite. I need to use a Reset to convert a 32-bit value to two 16-bit BCD values.

Am I doing something wrong? Or is the documentation at fault?

 

[Export STL]

Is it possible to export the STL-code from U90Ladder? (I'd like to compare two programs, or is this possible in some other way?)

[Jazz indirect clock function]

In U90Ladder I've tried to use the indirect clock function time. It allows you to specify a start and an end time and between these two times the output will be active. The problem I have is with the format in which it appears I have to specify these times. The time AB:CD is equal to the value A*4096 + B*256 + C*16 + D. In other words: the value is equal to that value which in hexadecimal representation reads like the time it is representing.

Suppose I read the RTC using SI31. Suppose it is 12:34 and I want to know the time in hours and minutes. I will use SI31 and read the integer 1234. I divide by 100 to get the hours and in the remainder (SI4) I can find the minutes.

Now I want to do the reverse. I start with 12 and 34. I have to divide 12 by 10, multiply the result by 6 and it this to 12. I then multiply this by 256. I then divide the minutes by 10, multiply by 6 and add the results to the minutes. I finally add the transformed minutes and hours to get the value I need for the indirect clock function:

12/10 = 1

1*6 = 6

12 + 6 = 18

18*256 = 4608

34/10 = 3

3*6 = 18

34+18 = 52

4608 + 52 = 4660 (which is 1234h)

Can this be done simpler? (and as a bonus question: why on earth does this function not use the same format as SI31?)

[Jazz precision]

But is it a device specific deviation? So if it reads 480 (for a 500 signal) does that mean it will read 480 every time? Because, as said, that is simply a matter of calibrating. However if the same device will give 480 one time and 520 the next then I have a problem...

[Jazz precision]

I'm still not completely sure how to interpret this. 3% of 20mA is 0.6mA, or in 'raw-value' it is about 30 (of 1024). If I look at the measured analogue input, it's value is quite constant. So, and perhaps this conclusion is wrong, the 30 is not an error that happens from measurement to measurement. Is it an error between models?

[Jazz precision]

I was reading the specifications for a Jazz (this one: http://www.unitronic...SPEC_ 06-06.pdf). On page 2 it mentions that the precision is 3%. 3% of what?