[R/W Digital/Analog I/O in Sinamics G120 via Modbus]

Hello people!

I need some help to do the follow in sinamics G120 via modbus:

Read a Digital Input: I read parameter  40240 with a V350 (239 in unilogic) but always is in 0

Write a Digital Output: I write parameter  40220 with a V350 (219 in unilogic) but always is in 0

Read Analog input: I read parameter  40260 with a V350 (259 in unilogic) but always is in 0

The communication is ok because I can command the motor with parameter 40100 (writting 47F and 47E) and  change the speed in parameter 40101.

Thanks!!

Best Regards 

 

Mario

[Problem with V350 + Sinamics G120]

On 10/16/2020 at 6:59 PM, kratmel said:

Great news. 

If it possible - please select by red ink parameters in table that you change for rectify problem. 

And this table can be useful for another forum users.

 

Hello,

I can solve my problem setting the G120 parameteres like the information of the table (parameteres marked in yellow) 

Best regards!

 

Mario

[Problem with V350 + Sinamics G120]

Hello People!

I solved the problem!!!! It was a mistake in the stw confiuration, I correct this with the values of the manual:

Thank you for your help and time! If in the future I can help with something, please count on me!

Best Regards

 

Mario

 

[Problem with V350 + Sinamics G120]

On 10/13/2020 at 3:30 PM, kratmel said:

Hi, in

Verifying the Installation

chapter of document in my above post present Modbus registers that can be sw. OFF1 bit directly.

Please try to do this for test - it is the same idea as Joe provide with DI0 but via software.

Hello!

I try set the parameter 40003 ( number 2 in visilogic) but the communication state change to "5". Another question, the "big endian" formtat, used by Siemens, could be  the origin of the problem?

Thanks for your time and help!

 

Best regards

Mario

 

 

[Problem with V350 + Sinamics G120]

On 10/10/2020 at 4:35 PM, kratmel said:

Hi,

Some quastions:

1) Is it speed and 8E1 (simens default) settings  commisioned corectly in V350 com settings?

 2) Is it G120 setpoint channel sw. = Modbus, Control channel = Modbus?

3) Is it G120 correctly commisioned and all self autotune done and all autotune settings written to the drive . Drive do not allow to net control before autotune done (default).

4) What is with modbus status when command was send?

 

maybe this document is useful:

https://static1.squarespace.com/static/5357e4cfe4b02760ee8a9506/t/53ecf6f2e4b03c7a36fcfed3/1408038642976/MicroBridge+Modbus+Plus+to+G120+App+Note.pdf

chapter Verifying the Installation

 

Hi!,

First of all, thanks for your time!. I respond your questions:

1) Is it speed and 8E1 (simens default) settings  commisioned corectly in V350 com settings?

The comunication it´s ok because I can write and read diffents parameters (I set 8 bits, Even and  1 stop bit)

 2) Is it G120 setpoint channel sw. = Modbus, Control channel = Modbus?

I can´t find the control channel parameter.

3) Is it G120 correctly commisioned and all self autotune done and all autotune settings written to the drive . Drive do not allow to net control before autotune done (default).

Autotune is done

4) What is with modbus status when command was send?

The modbus Status is 0 (communication OK

[Problem with V350 + Sinamics G120]

On 10/10/2020 at 11:41 PM, Joe Tauser said:

Do you have the wired Enable signal on the drive terminals connected (DI0)?

Joe T.

Hello Joe, DIO es connected to a sensor, The signal is ok I try with DI0 in ´1´ or ´0´ but the result is the same, the inverter is stopped.

 

All the inputs have the right connection and I chek if the signals are OK.

All is ok, but the problem persist.... 😞

 

 

 

[Problem with V350 + Sinamics G120]

Hello everybody! Please I need some help!
I´m trying to command a G120 with  a V350 via modbus (over Rs485 - two wires). The communication its ok, but I can´t change to Run status the inverter. 

The Starter display the following:

My program is the following

First: I write 0x47E in the parameter 40100

Seond: I write the Main Set point in the parameter 40101

Third: I write the command 0x47F in the parameter 40100

if someone can send me an example or give me some help, I will be very grateful!!

Thanks a lot!!

Mario

 

 

[Communicate a G120 with a V350 in Modbus RTU network]

On 8/6/2020 at 5:23 PM, kratmel said:

Please see correct MODBUS addresing for G120

https://cache.industry.siemens.com/dl/files/159/99685159/att_83708/v1/G120_Field_busses_FH17_0414_eng_en-US.pdf

You use 111 address for reading, maybe it is wrong.

Please see  on p.101 modbus telegram format and use correct  110 as equal to address 40111  (for 40110 used 006D hex = 109 dec in telegram example) 

That was the problem!!! Thanks!!!!

[Communicate a G120 with a V350 in Modbus RTU network]

 

23 hours ago, kratmel said:

Maybe this document is useful

https://cache.industry.siemens.com/dl/files/623/109764623/att_978241/v1/109764623_G120C_Modbus-communication_DOC_V10_en.pdf

Please see STW1-control and   ZSW1-status address.

40100- control byte

40101-setpoint.

Also try to swap RS485 wires.

 

P/S 

Maybe you try to setup V350 PORT 1  as Modbus and at the same time - try to monitor communication via USB port  connected to SAME PORT 1.

You need to use Ehternet card for connect to Visilogic or install add PORT2 RS485 com card as MODBUS com2 for use USB cable as connection to Visilogic 

 

I checked what you indicated, but all was ok, and I still have the problem.... I added a ethernet port and I can see that the status messages is in "4". It´s is possible that the end resistor was the problem?

Thanks for your Help!!

Best Regards

 

Mario

 

 

[Communicate a G120 with a V350 in Modbus RTU network]

Hello!, my name is Mario and I ask if someone can please help me with my problem.

I try to control a Sinamics G120 with a V350 via modbus RTU, but I can´t do it!

The connection of between the PLC and the V350 is:

V350 (jumper set "RS485" - Jumper TERM: off)  

Port 1 - Pins: 1 and 6

Sinamics G120

X128: terminals 2 and 3

Configuration of the project:

Sinamics G120 (Starter):

V350 (Visilogic)

I tried to change some parameters of the communication, but the problem never disappear (status message=5). If somebody can give me some help I will be very grateful!

Best Regards

Mario

 

 

 

 

 

 

 

 

 

 

 

[Unitronics and Siemens MODBUS Communication]

On 3/5/2012 at 2:06 PM, Jesus Torner said:

I have made a little project to communicate Unitronics and Siemens S7-1200 PLC's by MODBUS TCP:

Unitronics:

Software Visilogic 9.31

Unitronics IP: 192.168.1.200

MODBUS_COMM: Connect Sockets 0 and 2 as Slave with different ID to Siemens IP Address 192.168.1.204

 

Siemens:

Siemens IP: 192.168.1.204

PLC: 1214 DC/DC/DC

Software: Tia Portal V11 SP1

PLC Fw: 2.12

Modbus function: MB_CLIENT

 

 

• Unitronics can read DB2.DBW0 from Siemens PLC
• Unitronics can wirte MI3..MI5 to Siemens PLC

 

To donwload the project click HERE

More cuestions in this post.

Hello, could you load again the project? I try download but it doesn´t exists.

Thank you

Best regards

Mario