[Modbus RTU error code -1 and status code -11]

hi...can you share how your slave are configured as registers read/write and also how you call the modbus function in the ladder?

[Modbus RTU error code -1 and status code -11]

dear alexandre_poliplante,

to read the value of "corrente media [A]" are you point the register 5 (endereco long) or 10 (endereco short)?

I think that you have to point the register 10 and read 2 contiguous registeres...so 10 and 11.

[Multiple schedules for one output]

Dear Antal,

the PLC will execute exactly each single command...so if you have 2 or more contiguous "simple coil" command the status of the last win.

to avoid this you have to use the SET and RESET coil; in this way if cois is SET a RESET event has to arise to set it to "0".

however my suggest is have only one place where a coil,  coupled with an output, is SET or RESET...following the relative conditions.

[SD Management...how to know when the files are deleted?]

Dears,

by the "SD MANAGEMENT" I can select the max files stored in each folder...so the PLC will automatically erase the older files when the limit is exceeded...how to know when this will happens?...is a BIT that I can check or I have to take in care the files count?

thanks

[Append buffer to SD file...how to have a "new line"?]

dears,

i think that I understood the "probem"...at the end I was adding some String items , also the ";" separator and the "EOF" simbol", bu tthis last has to be added directly in the buffer as "costant" and not as String.

Now seems works...I have to try to read from SD file into the buffer...

[Append buffer to SD file...how to have a "new line"?]

Dears All,

i am concatenating 4 String UTF-16 formated; between the strings I insert a ";" separator (also UTF-16 formated)...so...I am able to have the end buffer properly filled with th einformation...but I am not able to have a "new line" when I try again to append the buffer at the SD file.

I tried to insert, at the end of the buffer, a lot of characters (u\2424; u\000D; u\000A...etc alone and conbined )...but nothing works...or better...with the file saved as TXT and with the u\000D in the "windows note pad" I see the right lines...but if I use "notepad ++" or i try read this as CSV i have a long single line.

how to have a "new line" ?

thanks

[Modbus programming]

dear TJ,

some not clear info from you...I mean...you wrote about ModBus TCP but the document attached report, for these devices, ModBus RTU by RS485...have you a gateway in the middle?

[Use Alias Names as Tag:Link in text element]

Hi Dave,

in my opinion this is a good request...because, I think, all of us have one or more debug pages about the I/O status (also to force the output as test)...and always I have to manually write the "name" of the I/O that usualy is the same, or can be, as usedin the "alias".

["Store DTI to file" problems on 29.111]

hi Rivka,

thanks for the update,

[Special request on learning unilogic]

hi remy,

maybe my suggestion is not so smart but...did you take a look at the unilgic examples?

also..did you take a look at the youtube videos that explain how to configure and use the differents functions?

[Modbus 485 with IEEE 754 floating points number]

hi vken,

 

from your picture I saw that the function 1 (maybe is the main function) has no BIT trigger to do the conversion from 2xint16 and REAL...also to perform the byte swapping...so this funciton will called a many times (one for each PLC cycle)...please try to insert a BIT command to perform these actions.

regards

[Modbus 485 with IEEE 754 floating points number]

Just to know...are you trying to read info starting from address 1 or address 0?

because the column called "Modbus Protocol Start Address Hex" show that you have to start from address 0x0000...then 0x0000 and 0x0001 will contain the info about the "Phase 1 line to neutral volts"; address 0x0002 and 0x0003 will contain ythe info of  "Phase 2 line to neutral volts"...and so on

[Best way for data acquisition form UniStream to PC on win10]

2 hours ago, AlexUT said:

Is you link for Linux-like PCs?

...I took the first exampke that I found searching "pythin async modbus client" without any checks...😀

 

[Best way for data acquisition form UniStream to PC on win10]

hi damiankk,

in my opinion with 100 variables you can use the modbus way...what you have to be sure is that at the PC side the python scrip has to use an asynchronous method.

I am not so deeply inside python but I found THIS example about how to implement an async modbus_TCP_client.

["Store DTI to file" problems on 29.111]

Hi Flex,

customer asked for new features then I thought that can be the case to take a look at the new release.
I am testing this in the PLC that I am using as emulator.
At the start up of the program I upload/create 9 DTI as system configuration...then only when the "initialization" is completed I let the program run...with version 1.26 need very few time..with version 1.29, more or less, 30 seconds.

Also, as I wrote, i found that not all .sig files was created...then I removed the "&" from the file name and the .sig was present.

["Store DTI to file" problems on 29.111]

Hi All,

I just update one of my project, that is working perfectly, from version 1.26.90 to 1.29.111...and I saw that the ladder function Store DTI to File need more time referred at the previously version...to be clear I let 1 as F parameters (all file type)...with version 1.26.90 I think that the storage of the file needed much less of 1 seconds for each DTI....with version 1.29.111 I think 4-5 seconds are needed!

I tried to clean the SD...then all the files are generated by the same version...but is the same.

I also saw that some .sig file are added...but if the file name has a special characters like "&" the .sig file creation fail and avery time that I tried to save the file the "SD store failure counter" increase....I removed the "&" and all works fine.

what can be?

[Data Table as Function In]

hi Daniel_EWW,

i think that the "problem" is that the DT_Index as FunctionIn variable is not able to define the type/lenght of sructure that it is referring (seems somthing like late binding)...then is not able to let you select the right local or global structure variable to store the "value".

[Data Table Warning Alarm]

Hi Flex727,

usually I also use "insert" and "remove" row in the DTI...and this "warning" is present, I think, from version 1.25.xx...also a warning when you use the "indirect modbus ID or Group ID" function was added...to remember that the FB has not to be the first element in the ladder but a small delay or a "enabling contact" is needed.

However ...as I wrote...I usually use "insert" and "remove" command for table about 200-300 rows and I didn't have problem.

As Kratmel wrote this can be a problem (watchdog) when the DTI include thousands of rows and you have to insert/remove row 0,1,2...

[Information about Modbus module]

hi,

what is the aim of the "MODBUS SET SLAVE ID" module  and how this must be configured?

I don't found any description in the help file...

thanks

[Unistream notifier don't let me remove the USB stick...]

hi Saragani,

so...I did some "test"...at the end if I open the unistream program and after recall my project, then close it, the USB seems always "free" and I can safetly remove this. If I open the project by a double click on the .ulrp file, then close the program, the USB still be busy but not all the times...let me say 7 out of 10. This happens in 2 different PC (one with W10 PRO and a second with W10 HOME).

PS: in these 7/10 cases the only way to let the USB stick free is close by task manager the unistream notifier.

[Unistream notifier don't let me remove the USB stick...]

Hi AlexUT,

thanks for the answer and to explained me that "This may lead to project corruption"...I will follow your suggestion

regards

[Unistream notifier don't let me remove the USB stick...]

Dear All,

I saw that if I open a project uploaded in a USB stick when I close this and ask to "safetly remove" the USB stick I have an error message that the USB stick still be used...if I close the unistream notifier, by the task manager (windows 10) I can do this without problem...then the unistream notifier take busy the USB stick.

This is not a real problem but is a little"annoying".

[We want to know!]

Hi Stojan,

all depends about what you need to do/transfer/check with the remote PC.

1) you can setup the PLC as Modbus SLAVE by TCP/IP connection....to do this you have to search in the "solution explorer" window: PLC communication -> Protocols -> MODBUS -> Slaves -> Panel Ethernet.

done this you have to create SLAVE and add coils or registers ...Unistream expose some types of operation to manage the modbus coils/reguster...so I think that is better if you take a look at the online help.

in this way you will create your own registers list...that can be only readable or readable and writable...

2) you can create structs that contain the information that you need...then write these information in some Data Tables...store these Tables in some files (SD card in the PLC is needed) and transfer by FTP these files (CSV format) in the remote PC...the remote PC will manage these files.

3) store all the information in some DB in the remote PC

 

all these possible way need that the PC is able to manage the information...then some specific program has to be or created or uploaded and installed...

from your message I don't understood if you will create the PC program; if this program is already present...or what.

[HMI on Tablet]

Hi Swervomotor,

if I well remember the webserver don't manage the custom control elements...then...are you using custom control?...in this case the VNC is the way.

[C Function to convert string to upper case]

Dear dhazelman

the position "D" in the UDFB "find DTI colum value" is the starting row of the column where to search...and the position "E" is how many rows must be checked...you setted this last as "0".