topic Re: Rotary table WEISS Labview in LabVIEW

Rotary table WEISS Labview

henk1000 — Tue, 16 Jul 2024 14:21:07 GMT

Hello,

Is there someone out there with some experience sending commands via Modbus to a rotary table WEISS.

Re: Rotary table WEISS Labview

Bob_Schor — Wed, 17 Jul 2024 02:07:53 GMT

A picture doesn't give us much information to help you answer your question. Does the company have a LabVIEW driver? Do you have a detailed manual that describes how to control this "Rotary table WEISS" (model number not provided)? Have you contacted WEISS?

Bob Schor

Re: Rotary table WEISS Labview

santo_13 — Wed, 17 Jul 2024 02:25:53 GMT

@henk1000 wrote:

Hello,

Is there someone out there with some experience sending commands via Modbus to a rotary table WEISS.

are you looking to hire or seeking guidance?

Are you familiar with using the Modbus library in LabVIEW?

Re: Rotary table WEISS Labview

henk1000 — Wed, 17 Jul 2024 19:32:42 GMT

I am looking for guidance. I have used the modbus library in Labview. I have not contacted the company yet. I will have a look to see if they provide a driver.

Re: Rotary table WEISS Labview

rolfk — Thu, 18 Jul 2024 11:37:44 GMT

The documentation available from their website doesn't even tell anything about how to interface to that drive. What makes you think you can/need to use Modbus?

Re: Rotary table WEISS Labview

henk1000 — Thu, 18 Jul 2024 18:02:22 GMT

Their documentation mention Modbus communication. I have succeeded using python but not with only the Labview blocks.

Re: Rotary table WEISS Labview

santo_13 — Fri, 19 Jul 2024 03:22:13 GMT

@henk1000 wrote:

Their documentation mention Modbus communication. I have succeeded using python but not with only the Labview blocks.

If you could share your Python code, it is possible to reproduce it in LabVIEW equivalent or in the worst case, use the Python code as such.

Re: Rotary table WEISS Labview

Jay14159265 — Mon, 22 Jul 2024 14:58:25 GMT

@santo_13 wrote:

...in the worst case, use the Python code as such.

lol, terrible option for sure.

But seriously op, post the python code.

Re: Rotary table WEISS Labview

henk1000 — Wed, 24 Jul 2024 08:49:21 GMT

That's the answer from WEISS

"

As I suspected, we cannot help you.

Unfortunately, we do not have anyone who knows anything about programming with LabView.

I cannot give you any further references either, as we have not come across this topic before.
"

😪

Re: Rotary table WEISS Labview

pincpanter — Wed, 24 Jul 2024 10:14:51 GMT

@henk1000 ha scritto:

That's the answer from WEISS

"

As I suspected, we cannot help you.

Unfortunately, we do not have anyone who knows anything about programming with LabView.

I cannot give you any further references either, as we have not come across this topic before.
"

😪

This is not a solution definitely. If you succeded with Python, you can certainly do the same with the LabVIEW library. The matter is to use the proper functions with the proper arguments (addresses, for example, may not match).

Again, post your Python code and whatever you came up with LabVIEW describing what works (if any) and what doesn't.

Re: Rotary table WEISS Labview

henk1000 — Wed, 24 Jul 2024 13:41:18 GMT

That is the Python code. It works for me. I have tried 3 libraries of Modbus in Labview including the NI Modbus library. Tried writing to single registers, multiple registers, coils, etc. Device number, time out, address, etc.
Always comes with an error when Labview executes the block to read.

Re: Rotary table WEISS Labview

pincpanter — Wed, 24 Jul 2024 14:37:26 GMT

So please post the NI Modbus free library version and describe which error and where, so we can check it.

Re: Rotary table WEISS Labview

santo_13 — Wed, 24 Jul 2024 15:14:18 GMT

@henk1000 wrote:

That is the Python code. It works for me. I have tried 3 libraries of Modbus in Labview including the NI Modbus library. Tried writing to single registers, multiple registers, coils, etc. Device number, time out, address, etc.
Always comes with an error when Labview executes the block to read.

Seems pretty simple enough, please attach your LV code to see what could be the problem.

from pymodbus.client import ModbusTcpClient def read_modbus(client, a, b): """A dummy docstring.""" v = client.read_holding_registers(a,b).registers position = hex_to_dec(v[0], v[1], 10000) speed = hex_to_dec(v[4], v[5], 10000) torque = hex_to_dec(v[8], v[9], 1000) motor_state = v[12] print(f"position: {position}") print(f"speed: {speed}") print(f"torque: {torque}") print(f"motor_state: {motor_state}") def hex_to_dec(reg1, reg2, factor): """A dummy docstring.""" a = str(hex(reg1)) a = a[2:] b = hex(reg2) b = b[2:] c = "0x" + b + a c = int(c, 16) / factor # normaly 10000 return c def writeModbus(client, a, b): """A dummy docstring.""" try: write_to_motor = client.write_registers(a, b) assert not write_to_motor.isError() except ConnectionError as errorcom: raise SystemExit from errorcom def modBus(): """A dummy docstring.""" try: client = ModbusTcpClient('192.168.1.200', port=502) print("Modbus connected") except ConnectionError as errorcom: print("Can not connect to PLC!") raise SystemExit from errorcom return client connect = modBus() read_modbus(connect, 60, 13) # Read from 60, 13 registers writeModbus(connect, 0, 1) # Write on register 0, value 1 connect.close()

Re: Rotary table WEISS Labview

Jay14159265 — Wed, 24 Jul 2024 15:15:06 GMT

@henk1000 wrote:

That is the Python code. It works for me. I have tried 3 libraries of Modbus in Labview including the NI Modbus library. Tried writing to single registers, multiple registers, coils, etc. Device number, time out, address, etc.
Always comes with an error when Labview executes the block to read.

Well if you are having so much trouble with the LabVIEW modbus libs and the Python modbus lib works, just call the python code in LabVIEW with a python node, see here in LabVIEW for examples:

Examples for using the Python Node are available in the LabVIEW Example Finder (found in Help >> Find Examples...) under Communicating with External Applications >> Using External Code >> Integrating Python Code.

Or if you must make it work in pure LabVIEW, post the error that you got.

Re: Rotary table WEISS Labview

LVNinja — Wed, 24 Jul 2024 15:48:55 GMT

Ask them for the MODBUS protocol.

Re: Rotary table WEISS Labview

henk1000 — Thu, 25 Jul 2024 06:28:52 GMT

That's what I have been doing, but would nice having only the Labview application.

Re: Rotary table WEISS Labview

henk1000 — Thu, 25 Jul 2024 06:41:38 GMT

Re: Rotary table WEISS Labview

Jay14159265 — Thu, 25 Jul 2024 13:52:31 GMT

@henk1000 wrote:

Thanks, that helps. Error 56 is a timeout error:

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019Lz2SAE&l=en-US

Re: Rotary table WEISS Labview

Jay14159265 — Thu, 25 Jul 2024 13:53:42 GMT

I don't have that modbus library, can you set the timeout?

Re: Rotary table WEISS Labview

LVNinja — Thu, 25 Jul 2024 14:16:55 GMT

What happens if you try this ?